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Journal articles on the topic 'Fault plane solution (FPS)'

Author: Grafiati

Published: 3 June 2025

Last updated: 19 July 2025

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1

Telesca, L., V. Alcaz, and I. Sandu. "The stress field of Vrancea region from fault plane solution (FPS)." Natural Hazards and Earth System Sciences 11, no. 10 (2011): 2817–20. http://dx.doi.org/10.5194/nhess-11-2817-2011.

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Abstract. The fault plane solutions (FPS) of 247 seismic events were used for stress field investigation of the region. The eigenvectors t, p, b, and moment tensor M components for each FPS were defined and computed numerically. The obtained results confirm the hypothesis of subduction-type intermediate depth earthquakes for the Vrancea seismic region and this may be considered the first approximation of the stress field for the whole of the Vrancea (intermediate depth) region.

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2

Du, Jing, and Norm R. Warpinski. "Uncertainty in FPSs from moment-tensor inversion." GEOPHYSICS 76, no. 6 (2011): WC65—WC75. http://dx.doi.org/10.1190/geo2011-0024.1.

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Although microseismic monitoring of hydraulic fractures has primarily been concerned with the dimensions, complexity, and growth of fractures or fracture systems, there is an ever-increasing desire to extract more information about the hydraulic-fracturing and/or natural fractures from microseismic data. Source mechanism analysis, which is concerned with deducing details of the failure process from the microseismic waveform data, is, therefore, attracting more attention. However, most of the studies focus more on the moment-tensor inversion than on extracting fault-plane solutions (FPSs) from

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3

Yilmazer, Mehmet, Bilal Bektas, and Miklos Kozlovszky. "Gridification of regional Fault Plain Solution (FPS)." Earth Science Informatics 3, no. 4 (2010): 239–45. http://dx.doi.org/10.1007/s12145-010-0068-x.

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4

Ma, Ju, Shuang Wu, Yuan Zhao, and Guoyan Zhao. "Cooperative P-Wave Velocity Measurement with Full Waveform Moment Tensor Inversion in Transversely Anisotropic Media." Sensors 22, no. 5 (2022): 1935. http://dx.doi.org/10.3390/s22051935.

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Precise stochastic approaches to quantitatively calculate the source uncertainties offers the opportunity to eliminate the influence of anisotropy on moment tensor inversion. The effects of ignoring anisotropy were tested by using homogeneous Green’s functions. Results indicate the influence of anisotropy and noise on fault plane rotation is very small for a pure shear source whether it is restricted to double couple solution or full moment tensor solution. Green’s functions with different prior rough anisotropy information were tested, indicating that the complex source is more sensitive to v

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5

Wong, Ivan G., and James R. Humphrey. "The 14 August 1983 Cimarron, Colorado Earthquake and the Cimarron Fault." Mountain Geologist 23, no. 1 (1986): 14–18. http://dx.doi.org/10.31582/rmag.mg.23.1.14.

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On 14 August 1983, a small earthquake of Richter magnitude 3.4 occurred near the town of Cimarron in southwestern Colorado. The analysis of data collected from seismographic stations located within the intermountain U.S. suggests the earthquake occurred on the Cimarron fault, a major west-northwest trending Precambrian fault which has experienced displacement possibly since Oligocene time. A fault plane solution determined for the earthquake exhibits normal faulting on a moderately dipping, west-northwest- or east-west-trending fault plane in good agreement with the geologic observations of th

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6

Eva, Elena, Franco Pettenati, Stefano Solarino, and Livio Sirovich. "The focal mechanism of the 7 September 1920, Mw 6.5 earthquake: insights into the seismotectonics of the Lunigiana–Garfagnana area, Tuscany, Italy." Geophysical Journal International 228, no. 3 (2021): 1465–77. http://dx.doi.org/10.1093/gji/ggab411.

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SUMMARY To understand the seismotectonics and the seismic hazard of the study sector of the Northern Apennines (Italy), one of the most important earthquakes of magnitude Mw = 6.5 which struck the Lunigiana and Garfagnana areas (Tuscany) on 7 September 1920 should be studied. Given the early instrumental epoch of the event, neither geometric and kinematic information on the fault-source nor its fault-plane solution were available. Both areas were candidates for hosting the source fault and there was uncertainty between a normal fault with Apenninic direction or an anti-Apenninic strike-slip. W

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Daniarsyad, Gatut, Aprilia Nur Vita, and Shengji Wei. "Focal Mechanism Analysis of the September 25^th, 2019 Mw 6.5 Ambon Earthquake and Its Implication for Seismotectonics." IOP Conference Series: Earth and Environmental Science 873, no. 1 (2021): 012032. http://dx.doi.org/10.1088/1755-1315/873/1/012032.

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Abstract On September 25th, 2019, an Mw 6.5 earthquake occurred in Ambon, Maluku Province, Indonesia, and caused casualties and infrastructures damages. The epicenter located in a tectonically active region with the potential strike-slip and thrust faulting earthquake sources, yet the responsible fault is still not well understood. Based on focal mechanism solutions from available seismological agencies, i.e. USGS, GFZ, GCMT, and BMKG, the earthquake has a similar strike-slip focal mechanism, although there are discrepancies on detailed source parameters. To provide a better understanding of t

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8

Kiratzi, Anastasia A., and Constantinos B. Papazachos. "Moment-tensor summation to derive the active crustal deformation in Japan." Bulletin of the Seismological Society of America 86, no. 3 (1996): 821–31. http://dx.doi.org/10.1785/bssa0860030821.

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Abstract The country of Japan and the surrounding area has been divided into 12 seismogenic sources, which belong to five belts with an almost uniform orientation of the stress field. In each one of these sources, the active crustal deformation has been determined, using the summation of the seismic moment tensors of mainly post-1964 earthquakes. The analysis showed that due to the subduction of the Philippine Sea plate beneath the Eurasian plate, the deformation is expressed as compression at a mean direction of N53°W and an average rate of 1.5 cm/yr. The fault-plane solution corresponding to

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9

Hasegawa, Henry S., and John Adams. "Reanalysis of the 1963 Baffin Island Earthquake (MS 6.2) and its Seismotectonic Environment." Seismological Research Letters 61, no. 3-4 (1990): 181–92. http://dx.doi.org/10.1785/gssrl.61.3-4.181.

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Abstract The 1963 Baffin Island earthquake of MS 6.2 is reanalyzed to determine whether or not it involved normal faulting, as previously suggested. The revised fault-plane solution has nodal planes with strike 113°, dip 66°, rake 235° and strike 352°, dip 41°, rake 322°. The T-axis trends 227° and plunges 14°, and the P-axis trends 338° and plunges 55°. Thus though this solution confirms normal faulting, it suggests a larger strike-slip component than most previous studies. The tension axis is oriented SW, which is normal to the NW geographic trend of Baffin Island. We consider that the norma

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10

Torres-Contreras, Ignacio, Juan Carlos Jáuregui-Correa, Carlos Santiago López-Cajún, and Salvador Echeverría-Villagómez. "Effects of Phase Shift Errors in Recurrence Plot for Rotating Machinery Fault Diagnosis." Applied Sciences 11, no. 2 (2021): 873. http://dx.doi.org/10.3390/app11020873.

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For fault diagnosis and predictive maintenance of rotating machinery, the phase errors generated by the integration processing of a vibration signal are an essential investigation subject. Phase errors affect the solution of mechanical systems with multiple vibration sources and also the information transmitted through the vibration that is used for fault diagnosis. This work proposes the use of phase plane, recurrence plot (RP), and cross recurrence plot (CRP) to evaluate phase shift error effects on the solution of multiple asynchronous and simple periodic functions, and on the smoothing of

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11

Shimizu, Kousuke, Yuji Yagi, Ryo Okuwaki, and Yukitoshi Fukahata. "Development of an inversion method to extract information on fault geometry from teleseismic data." Geophysical Journal International 220, no. 2 (2019): 1055–65. http://dx.doi.org/10.1093/gji/ggz496.

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SUMMARY Teleseismic waveforms contain information on fault slip evolution during an earthquake, as well as on the fault geometry. A linear finite-fault inversion method is a tool for solving the slip-rate function distribution under an assumption of fault geometry as a single or multiple-fault-plane model. An inappropriate assumption of fault geometry would tend to distort the solution due to Green’s function modelling errors. We developed a new inversion method to extract information on fault geometry along with the slip-rate function from observed teleseismic waveforms. In this method, as in

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12

Fehler, Michael. "Identifying the plane of slip for a fault plane solution from clustering of locations of nearby earthquakes." Geophysical Research Letters 17, no. 7 (1990): 969–72. http://dx.doi.org/10.1029/gl017i007p00969.

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13

Lima, Williams A., and João B. C. Silva. "Combined modeling and smooth inversion of gravity data from a faulted basement relief." GEOPHYSICS 79, no. 6 (2014): F1—F10. http://dx.doi.org/10.1190/geo2013-0357.1.

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We have combined modeling and gravity inversion to estimate an overall smooth but locally discontinuous basement relief of a sedimentary basin. Through an initial global smoothness solution, the method indicates fault positions that may be accepted or modified. Then, the interpreter specifies the fault dip and a tentative fault slip, so the fault plane is fixed on the estimated relief. The segments of the current interpreted relief that are not accepted faults are estimated through smoothness inversion, and the response of the current estimated relief is computed. The slip of the fault being i

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14

White, Randall A., David H. Harlow, and Salvador Alvarez. "The San Salvador Earthquake of October 10, 1986—Seismological Aspects and Other Recent Local Seismicity." Earthquake Spectra 3, no. 3 (1987): 419–34. http://dx.doi.org/10.1193/1.1585439.

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The San Salvador earthquake of October 10, 1986 originated along the Central American volcanic chain within the upper crust of the Caribbean Plate. Results from a local seismograph network show a tectonic style main shock-aftershock sequence, with a magnitude, Mw, 5.6. The hypocenter was located 7.3 km below the south edge of San Salvador. The main shock ruptured along a nearly vertical plane toward the north-northeast. A main shock fault-plane solution shows a nearly vertical fault plane striking N32\sz\E, with left-lateral sense of motion. This earthquake is the second Central American volca

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15

Chander, R., and Kalpna. "Evidence from Earthquake Fault Plane Solutions on Upper Crustal Stresses in the Garhwahl Himalaya." Journal Geological Society of India 45, no. 6 (1995): 695–701. http://dx.doi.org/10.17491/jgsi/1995/450608.

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Abstract The individual thrust-fault type fault plane solution of the 1991 Uttarkashi earthquake is considered along with a reverse fault type and a strike-slip type composite fault plane solutions for the Garhwal Himalaya. The two latter solutions are based on data from 49 small and micro-earthquakes. All 50 earthquakes occured in the vicinityof Main Central Thrust over a distance of about 150km from Yamuna to Alaknanda valleys. The data are consistent with the view that a thrust-fault type stress environment prevails throughout the uppercrust in the region. The maximum effective principal st

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16

Delouis, Bertrand, and Denis Legrand. "Focal mechanism determination and identification of the fault plane of earthquakes using only one or two near-source seismic recordings." Bulletin of the Seismological Society of America 89, no. 6 (1999): 1558–74. http://dx.doi.org/10.1785/bssa0890061558.

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Abstract A waveform inversion scheme was developed in order to explore the resolving power of one or two seismic recordings at short epicentral distance for the determination of focal mechanisms and the identification of the fault plane of earthquakes. Two key features are used to constrain the fault parameters with a reduced number of stations: (1) a simple finite-dimension source model and (2) the modeling of the complete displacement field, including the near-field waves. The identification of the fault plane should be possible, even with a single station, as soon as the seismograms produce

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17

Dube, R. K. "Relocation of the Koyna earthquakes with a new velocity model." Bulletin of the Seismological Society of America 76, no. 2 (1986): 395–407. http://dx.doi.org/10.1785/bssa0760020395.

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abstract Hypocenter locations of 380 earthquakes of magnitude ≧ 3 in the Koyna region, recorded by the Central Water and Power Research Station Network of Seismological Observatories and the India Meteorological Department stations during the period December 1967 to December 1973, are determined after selection of an appropriate crustal model. The model is chosen from among the few available for the region on the basis of comparatively better hypocenter locations in terms of error parameters in the location of 32 events of magnitude ≧ 4 (master events). An epicenter map and hypocentral depth c

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18

Ndikum, Eric N., Charles T. Tabod, Alain-Pierre K. Tokam, and Bernard Z. Essimbi. "Fault-Plane Solution of the Earthquake of 19 March 2005 in Monatele (Cameroon)." Open Journal of Geology 04, no. 06 (2014): 289–93. http://dx.doi.org/10.4236/ojg.2014.46021.

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19

Thomas, G. C., R. S. Crosson, D. L. Carver, and T. S. Yelin. "The 25 March 1993 Scotts Mills, Oregon, earthquake and aftershock sequence: Spatial distribution, focal mechanisms, and the Mount Angel Fault." Bulletin of the Seismological Society of America 86, no. 4 (1996): 925–35. http://dx.doi.org/10.1785/bssa0860040925.

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Abstract The 25 March 1993 ML = 5.7 crustal earthquake near Scotts Mills, Oregon, was the largest earthquake to occur in the Pacific Northwest in over a decade. The mainshock was located at 45.033°N, 122.586°W and at a depth of about 15.1 km, based on arrival time data from the short-period Pacific Northwest Seismograph Network. Beginning about 12 h after the mainshock, investigators from the U.S. Geological Survey deployed 22 digital seismographs to record aftershocks. Using data from the temporary and permanent stations, we analyzed a subset of 50 aftershocks with quality locations. Hypocent

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20

Octhav, Asyer, David P. Sahara, and Dian Kusumawati. "The principal stress analysis of Matano Fault segment from focal mechanism inversion." IOP Conference Series: Earth and Environmental Science 1472, no. 1 (2025): 012013. https://doi.org/10.1088/1755-1315/1472/1/012013.

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Abstract The Matano Fault is an active left-lateral strike slip fault located in Sulawesi as continuation segment of the Palu-Koro Fault that separate Makassar Block from the North Sula Block. Many published studies revealed that the focal mechanism parameter can be used as useful information to estimate the principal stress orientation of an existing fault. We utilized the new moment tensor catalogue of Sulawesi which were produced from waveform inversion in the previous study. We selected twenty-five good-waveform-fitting solution from the catalogue. The solutions composed of shallow earthqu

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Wahlstreöm, Rutger. "The North Gower, Ontario, Earthquake of 11 October 1983: Focal Mechanism and Aftershocks." Seismological Research Letters 58, no. 3 (1987): 65–72. http://dx.doi.org/10.1785/gssrl.58.3.65.

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Abstract An earthquake near Ottawa (45.20°N, 75.75°W, focal depth 12 km) of unusually large size for the region's seisrhicity (mb(Lg) = 4.1) provided good P-wave first-motion data for a focal-mechanism solution. The maximum intensity was V(MM) and the area of perceptibility in Canada about 80,000 km2. The first and largest recorded aftershock occurred nine minutes after the main shock with magnitude mb(Lg) = 1.7. Two further small aftershocks ware recorded by a field network. The mechanism is thrust faulting with a predominantly horizontal pressure axis trending 154°. Thrust mechanisms have be

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22

Ebel, J. E., and K. P. Bonjer. "Moment tensor inversion of small earthquakes in southwestern Germany for the fault plane solution." Geophysical Journal International 101, no. 1 (1990): 133–46. http://dx.doi.org/10.1111/j.1365-246x.1990.tb00763.x.

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23

Jupe, Andrew. "How well are principal stress axes constrained by non-unique fault plane solution data?" Geophysical Journal International 115, no. 1 (1993): 319–22. http://dx.doi.org/10.1111/j.1365-246x.1993.tb05606.x.

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24

Lee, Jimin, Duk Kee Lee, and Jae-Kwang Ahn. "Automatic Fault Plane Solution for the Provision of Rapid Earthquake Information in South Korea." Sustainability 15, no. 1 (2022): 520. http://dx.doi.org/10.3390/su15010520.

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The Korea Meteorological Administration (KMA) provides detailed hypocenter information after the earthquake early warning (EEW) service, due to increased public interest and for the study of fault movements. However, the rapid production of hypocenter information has limitations, including the necessity for the calculation of focal mechanisms, which requires expertise in seismology. Therefore, we developed automatic focal mechanisms (AFMs) based on the time domain moment tensor inversion method. A key feature of AFMs is the automatic collection and reforming of waveform data using information

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Gao, Yongguo, and Xinxin Yin. "Research of Focal Mechanism and Focal Depth of Qilian, Qinghai Ms5.2 Earthquake." E3S Web of Conferences 131 (2019): 01062. http://dx.doi.org/10.1051/e3sconf/201913101062.

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This paper selects the waveform records of 16 broadband digital seismic stations in the regional seismic network of Gansu province, Qinghai province, and Sichuan province involved inversion, use CAP focal mechanism solution method to calculate the Ms 5.2 earthquake which occurred in Qilian County, Qinghai Province, November 23, 2015. Obtained the focal mechanism solution of this earthquake is a strike-slip fault with thrust property. The inversion results show the optimal double couple solution is nodal plane I: The strike is 112°, the dip, 51.7°; and the rake, 24.5°. Nodal plane II: The strik

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Abbaszadeh, M., K. Asakawa, H. Cinco-Ley, and N. Arihara. "Interference Testing in Reservoirs With Conductive Faults or Fractures." SPE Reservoir Evaluation & Engineering 3, no. 05 (2000): 426–34. http://dx.doi.org/10.2118/66406-pa.

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Summary This paper addresses interference testing in reservoirs with conductive faults allowing fluid flow along and across the fault plane. An altered skin region around fault thrusts is also included. It is found that the classical line-source solution does not apply. When active and observation wells are located across a fault, the interference behavior resembles that of a hydraulically fractured well with bilinear flow characteristics. However, different flow regimes are developed on the pressure derivative when the well pairs are situated at the same side: initially, the basic line-source

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Nasri, Rawia, Regaya Ksiksi, Mohsen Graia, and Mohamed Faouzi Zid. "A New Decavanadate with Organic Cation: Synthesis, Crystal Structure, and Hirshfeld Surface Analysis." Advances in Materials Science and Engineering 2021 (July 28, 2021): 1–8. http://dx.doi.org/10.1155/2021/5542315.

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A new 2,6-bis aminomethyl piperidine decavanadate hydrate, (C7N3H20)2V10O28.4.21H2O, was synthesized by slow evaporation of a solution at room temperature. The molecular structure was investigated by single-crystal X-ray diffraction. In the crystal structure, the layers of decavanadate groups, organic cations, and water molecules are arranged parallel to the (010) plane. Also, the prepared compound has been analysed by FTIR spectroscopy and scanning electron microscopy (SEM). The crystal structure of the title compound is stabilized by hydrogen bonds and van der Waals interactions. The cohesio

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Acharyya, S. K., J. R. Kayal, A. Roy, and R. K. Chaturvedi. "Jabalpur Earthquake of May 22, 1997: Constraint from Aftershock Study." Journal Geological Society of India 51, no. 3 (1998): 295–304. http://dx.doi.org/10.17491/jgsi/1998/510303.

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Abstract Macroseismic and microseismic (aftershock) investigations were carried out by the Geological Survey of India immediately after the Jabal pur earthquake (M 6.0) of May 22, 1997. The meizoseismal area of an intensity VIII (MSK) is 35 km long and 15 km wide, trending ENE-WSW. The aftershock investigation was earned out by a five-station temporary microearthquake (MEQ) network. Five felt aftershocks (M=3.0) and 23 aftershocks in the magnitude range 1.5 to &lt; 3.0 were recorded by the network. These are mostly clustered in an elongated area, 15 ×10 krn, near the main shock epicentre.

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Dreger, Douglas S., and Donald V. Helmberger. "Complex faulting deduced from broadband modeling of the 28 February 1990 Upland earthquake (ML = 5.2)." Bulletin of the Seismological Society of America 81, no. 4 (1991): 1129–44. http://dx.doi.org/10.1785/bssa0810041129.

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Abstract The 1990 Upland earthquake was one of the first sizable local events to be recorded broadband at Pasadena, where the Green's functions appropriate for the path are known from a previous study. The synthetics developed in modeling the 1988 Upland sequence were available for use in rapid assessment of the activity. First-motion studies from the Caltech-USGS array data gave two solutions for the 1990 main shock based on the choice of regional velocity models. Although these focal mechanisms differ by less than 5° in strike and 20° rake, it proved possible to further constrain the solutio

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Petersen, Tanja, John Ristau, John Beavan, et al. "The Mw 6.7 George Sound earthquake of October 15, 2007." Bulletin of the New Zealand Society for Earthquake Engineering 42, no. 2 (2009): 129–41. http://dx.doi.org/10.5459/bnzsee.42.2.129-141.

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The Mw 6.7 George Sound earthquake of October 15, 2007, occurred only a few kilometres offshore of Fiordland, within a region where the subduction zone of the Australian Plate beneath the Pacific Plate intersects the offshore extension of the Alpine Fault. Rapid response deployments of portable seismographs, a strong motion recorder and GPS receivers relatively close to the epicentre soon after the main shock allowed us to relate the event to thrusting at the subduction interface. The main shock moment tensor solution places the event at a shallow depth of 21 km. The sequence of aftershocks th

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Andrews, D. J. "Dynamic plane-strain shear rupture with a slip-weakening friction law calculated by a boundary integral method." Bulletin of the Seismological Society of America 75, no. 1 (1985): 1–21. http://dx.doi.org/10.1785/bssa0750010001.

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Abstract A numerical boundary integral method, relating slip and traction on a plane in an elastic medium by convolution with a discretized Green function, can be linked to a slip-dependent friction law on the fault plane. Such a method is developed here in two-dimensional plane-strain geometry. The method is more efficient for a planar source than a finite difference method, and it does not suffer from dispersion of short wavelength components. The solution for a crack growing at constant velocity agrees closely with the analytic solution, and the energy absorbed at the smeared-out crack tip

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Hamada, Shinkichi, Hisashi Yoshioka, Hiroshi Kawami, et al. "Frank Partial Dislocation in 4H-SiC Epitaxial Layer by MSE Method." Materials Science Forum 725 (July 2012): 31–34. http://dx.doi.org/10.4028/www.scientific.net/msf.725.31.

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We have been trying to improve a quality of crystal, using the metastable solvent epitaxy (MSE) method, one of the solution methods. In MSE, a Frank-type fault is formed by conversion of a threading screw dislocation (TSD) in the substrate. To study the status of the growth, we performed plane-viewed TEM observation. Analysis of Burgers vectors in the TEM image showed Frank PDs (Partial Dislocations) which do not include a components and Frank PDs which include a components. The total Burgers vectors of Frank-type fault including a components are represented as b=a/3+c, which indicates some TS

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Zhang, Ning, Yunfei Zhang, Denghui Dai, Yu Zhang, Baoyin Sun, and Xin Chen. "Propagation of Nonplanar SH Waves Emanating from a Fault Source around a Lined Tunnel." Sustainability 14, no. 16 (2022): 10127. http://dx.doi.org/10.3390/su141610127.

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An analytical solution is presented for scattering nonplanar SH waves emanating from a fault source using a lined tunnel. The lined tunnel is assumed to be an annular elastic solid in half-space. A simplified circular arc fault model is employed to represent the wave source. By means of the separation of variables method, all wave fields are given in terms of the wave function series with unknown coefficients. Taking advantage of the method of images, the zero-stress boundary condition on the horizontal ground surface is satisfied automatically. By applying Graf’s addition formula, a system of

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Ji, Chen, Don V. Helmberger, and David J. Wald. "A Teleseismic Study of the 2002 Denali Fault, Alaska, Earthquake and Implications for Rapid Strong-Motion Estimation." Earthquake Spectra 20, no. 3 (2004): 617–37. http://dx.doi.org/10.1193/1.1778388.

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Slip histories for the 2002 M7.9 Denali fault, Alaska, earthquake are derived rapidly from global teleseismic waveform data. In phases, three models improve matching waveform data and recovery of rupture details. In the first model (Phase I), analogous to an automated solution, a simple fault plane is fixed based on the preliminary Harvard Centroid Moment Tensor mechanism and the epicenter provided by the Preliminary Determination of Epicenters. This model is then updated (Phase II) by implementing a more realistic fault geometry inferred from Digital Elevation Model topography and further (Ph

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Zhong, Zixuan, Zhijian Liang, and Bin Liu. "Adaptive distance protection against transition resistance for distribution networks containing distributed generation." Journal of Physics: Conference Series 3033, no. 1 (2025): 012040. https://doi.org/10.1088/1742-6596/3033/1/012040.

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Abstract With the introduction of a large number of inverter interfaced distributed generators (IIDG), the measured impedance under a non-metallic short-circuit fault will not correctly reflect the distance from the protection installation to the fault point. Aiming at this problem, this paper analyzes the composite sequence diagrams under different types of faults in distribution networks containing IIDGs, uses the power-side fault components to find the additional impedance angle, and calculates the corresponding short-circuit impedance by combining with the impedance complex-plane relations

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Nishioka, Gail K., and Andrew J. Michael. "A detailed seismicity study of the Middle Mountain zone at Parkfield, California." Bulletin of the Seismological Society of America 80, no. 3 (1990): 577–88. http://dx.doi.org/10.1785/bssa0800030577.

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Abstract In order to better understand the preparation zone of the predicted Parkfield earthquake, a detailed study of the seismicity at middle Mountain in the Parkfield, California, area was made using 71 digitally recorded earthquakes that located within, or close to, the Middle Mountain alert box. These earthquakes were retimed on an interactive graphics system. Based on these new arrival times, new station corrections were developed; however the data did not support changing the velocity model developed from refraction and 1966 aftershock data. The process of retiming the earthquakes and u

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Purba, Siti M., Yaumil F. Alyssa, Mustika Nadia, Nadiatul Asra, and Umar Muksin. "The Influence of Seismometer Coverage on the Earthquake Focal Mechanism Solution (Case Study: Toba Swarm Earthquake)." IOP Conference Series: Earth and Environmental Science 1479, no. 1 (2025): 012014. https://doi.org/10.1088/1755-1315/1479/1/012014.

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Abstract The focal mechanism of an earthquake is necessary to describe the plane and characteristics of the fault. In the case of local earthquakes, the focal mechanism is often determined based on the first polarity of the primary wave. Therefore, the quality of the earthquake focal mechanism depends on the station coverage and the number of first polarities of primary waves. This study aims to investigate the variation in solution and quality of earthquake focal mechanisms with different station coverage. We conducted experiments on Toba swarm earthquake data for the May-June 2021 period wit

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Niu, Shengsuo, Xiaosen Zhou, Dasen Zhou, Zhiyao Yang, Haiping Liang, and Haifeng Su. "Fault Detection in Power Distribution Networks Based on Comprehensive-YOLOv5." Sensors 23, no. 14 (2023): 6410. http://dx.doi.org/10.3390/s23146410.

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Real-time fault detection in power distribution networks has become a popular issue in current power systems. However, the low power and computational capabilities of edge devices often fail to meet the requirements of real-time detection. To overcome these challenges, this paper proposes a lightweight algorithm, named Comprehensive-YOLOv5, for identifying defects in distribution networks. The proposed method focuses on achieving rapid localization and accurate identification of three common defects: insulator without loop, cable detachment from the insulator, and cable detachment from the spa

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Hu, Zongkai, Tao Li, Jessica Thompson Jobe, and Xiaoping Yang. "Lower Portion Rupture of a Thrust Fault during the 2017 Mw 6.3 Jinghe Earthquake: Implications to Seismic Hazards in the Tian Shan Region." Seismological Research Letters 92, no. 4 (2021): 2134–44. http://dx.doi.org/10.1785/0220200295.

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Abstract The 2017 Mw 6.3 Jinghe earthquake represents one of the few large earthquakes that are well recorded by seismic instruments and Interferometric Synthetic Aperture Radar (InSAR) observations in the seismically active Tian Shan region. In this study, we use the rupture fault solution (dip, dip direction, and slip sense) from seismologic and InSAR results, along with analysis of our collected surface mapping data, to determine the subsurface fault-plane geometry of the seismogenic Jinghenan fault. This geometric model, integrated with the coseismic slip distribution from seismologic and

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Hu, Zhaozheng, Hanbiao Xiao, Zhe Zhou, and Na Li. "Detection of parking slots occupation by temporal difference of inverse perspective mapping from vehicle-borne monocular camera." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 235, no. 12 (2021): 3119–26. http://dx.doi.org/10.1177/09544070211005579.

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Detection of parking slots occupation is a crucial task for parking assistance, automatic parking, and autonomous driving systems. This paper proposed a novel method, called Temporal Difference of Inverse Perspective Mapping Difference (TD-IPM), without explicit 3D reconstruction or objection detection. In this method, temporal images from monocular camera are first inverse perspective mapped (IPM) onto the ground plane based on camera calibration results. Second, we proposed an algorithm, called Block Consensus based on Rotation Invariance Phase-Only Correlation (BC-RIPOC), for fast and robus

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Purser, Jodi L., and Roy B. Van Arsdale. "Structure of the Lake County uplift: New Madrid seismic zone." Bulletin of the Seismological Society of America 88, no. 5 (1998): 1204–11. http://dx.doi.org/10.1785/bssa0880051204.

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Abstract The central segment of the New Madrid seismic zone lies within a left step-over zone between two northeast-striking, right-lateral, strike-slip fault systems. Within this compressional step-over zone is the topographically and structurally high Lake County uplift, which includes the Tiptonville dome and Ridgely ridge. We believe these structures are a consequence of deformation in the hanging wall above the northwest-striking, southwest-dipping Reelfoot reverse fault. Reelfoot fault dips 73° from the surface to the top of the Precambrian at a depth of approximately 4 km. From 4 to 12

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Papazachos, B., A. Kiratzi, B. Karacostas, D. Panagiotopoulos, E. Scordilis, and D. M. Mountrakis. "Surface fault traces, fault plane solution and spatial distribution of the aftershocks of the September 13, 1986 earthquake of Kalamata (Southern Greece)." Pure and Applied Geophysics PAGEOPH 126, no. 1 (1988): 55–68. http://dx.doi.org/10.1007/bf00876914.

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Li, Yongsheng, Wenliang Jiang, Yujiang Li, et al. "Coseismic Rupture Model and Tectonic Implications of the January 7 2022, Menyuan Mw 6.6 Earthquake Constraints from InSAR Observations and Field Investigation." Remote Sensing 14, no. 9 (2022): 2111. http://dx.doi.org/10.3390/rs14092111.

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A Mw 6.6 earthquake struck Menyuan, Qinghai, China, on 7 January 2022. To determine the rupture parameters of this event, the coseismic InSAR deformation fields were mapped and further employed to estimate the focal mechanism. The best-fitting solution emphasized that the 2022 Menyuan earthquake ruptured at the junction of the Tuolaishan fault and the Lenglongling fault. Both rupturing faults were dominated by sinistral strike-slip, and the main slip was concentrated on the shallow part of the rupture plane. The latter was the main rupture segment with a strike of 106° and a dip of 86°. The sl

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Guatteri, Mariagiovanna, and Massimo Cocco. "On the variation of slip direction during earthquake rupture: Supporting and conflicting evidence from the 1989 Loma Prieta earthquake." Bulletin of the Seismological Society of America 86, no. 6 (1996): 1935–51. http://dx.doi.org/10.1785/bssa0860061935.

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Abstract The direction of the slip can change during a rupture episode as a function of time and/or of the position on the fault plane. In this work, we focus on the spatial variations of slip direction during an earthquake. Theoretically, the spatial variations of rake are caused by changes in the direction of the static and dynamic traction. The 1989 Loma Prieta earthquake provides one of the most striking examples of slip direction rotation during the coseismic rupture. All the source models obtained by using different inversion procedures show strong spatial partitioning of slip into strik

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Fukuyama, Eiichi, and Raul Madariaga. "Integral equation method for plane crack with arbitrary shape in 3D elastic medium." Bulletin of the Seismological Society of America 85, no. 2 (1995): 614–28. http://dx.doi.org/10.1785/bssa0850020614.

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Abstract We have derived stress integral equations for an arbitrary shaped plane crack in a three-dimensional (3D) infinite homogeneous isotropic elastic medium. First we obtained the integral equation for static crack, which is consistent with previous works. Then we derived a new boundary integral equation for the study of dynamic tensile and shear cracks. We removed the hypersingularity that appears in the usual formulation of the stress-boundary integral equation method by a regularization technique. The dynamic stress integral equation consists of three terms which can be physically expla

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Chen, YingXian, HongXia Yang, YongChao Ye, and JiaYing Li. "Generation of 3D finite element mesh of layered geological bodies in intersecting fault zones." PLOS ONE 19, no. 1 (2024): e0293193. http://dx.doi.org/10.1371/journal.pone.0293193.

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As the geological fault surface divides the 3D space of stratified ores and rocks into complex spatial surface domains, it is necessary to fully consider the spatial relationship between intersecting fault zones and geological bodies in the process of 3D modeling, and how to accurately establish the 3D finite element mesh of geological bodies in intersecting fault zones is a difficult point in modeling complex geological structure. The laminated geological body in intersecting fault zone is a multifaceted domain grid model consisting of a ground-level grid, a geological fault plane grid, and a

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Koper, Keith D., Michael E. Wysession, and Douglas A. Wiens. "Multimodal function optimization with a niching genetic algorithm: A seismological example." Bulletin of the Seismological Society of America 89, no. 4 (1999): 978–88. http://dx.doi.org/10.1785/bssa0890040978.

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Abstract We present a variant of a traditional genetic algorithm, known as a niching genetic algorithm (NGA), which is effective at multimodal function optimization. Such an algorithm is useful for geophysical inverse problems that contain more than one distinct solution. We illustrate the utility of an NGA via a multimodal seismological inverse problem: the inversion of teleseismic body waves for the source parameters of the MW 7.2 Kuril Islands event of 2 February 1996. We assume the source to be a pure double-couple event and so parametrize our models in terms of strike, dip, and slip, guar

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Kim, Jin-Mi, Jai Bok Kyung, and Kwang-Hee Kim. "An Analysis of the Fault Plane Solution and Intensity on the Iksan Earthquake of 22 December 2015." Journal of the Korean earth science society 38, no. 7 (2017): 561–69. http://dx.doi.org/10.5467/jkess.2017.38.7.561.

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Över, Semir, Süha Özden, Esra Kalkan Ertan, Fatih Turhan, Zeynep Coşkun, and Ali Pınar. "20 July 2017 Bodrum-Kos Earthquake (Mw:6.6) in southwestern Anatolia, Turkey." Earth Sciences Research Journal 25, no. 3 (2021): 309–21. http://dx.doi.org/10.15446/esrj.v25n3.87080.

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In the Aegean Sea, the western part of Gökova Gulf, Kos and Bodrum were struck by a 6.6 (Mw) earthquake on July 20, 2017. The fault plane solution for the main shock shows an E-W striking normal type fault with approximately N-S (N4°E) tensional axis (T-axis). Fault plane solutions of 33 aftershocks show two groups of normal type fault with E-W and NE-SW to ENE-WSW orientations. The inversion of the focal mechanisms of the aftershocks yields two different normal faulting stress regimes: one is characterized by an approximately N-S (N5°E) σ3 axis (minimum horizontal stress axis). This extension

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Adekunle Eluyemi, Ayodeji. "Tectonic activity in Gulf of Guinea and Sub-Sahara West Africa: A validation of Freeth (1977) using focal mechanism solutions." Earthquake 2, no. 1 (2024): 1883. http://dx.doi.org/10.59429/ear.v2i1.1883.

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Fault plane solutions for a group of 104; 4.0 ≤ Mw ≤ 7.1 earthquakes between January 1979 and December 2016, extracted from the Global Centroid Moment Tensor Project catalog. Were used to investigate the regional tectonic stress regime of the Gulf of Guinea region. The idea is to validate the theory of membrane tectonics put forward by Freeth (1977)[1] in which the tectonic of the Gulf of Guinea and the sub-Sahara West Africa region were described based on Freeth (1977)[1]. The tectonic of the Gulf of Guinea and the sub-Sahara West Africa region are based on the movement of the African plate,

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