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Journal articles on the topic 'Seismic swarms'

Author: Grafiati

Published: 19 July 2023

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1

Passarelli, Luigi, Paul Antony Selvadurai, Eleonora Rivalta, and Sigurjón Jónsson. "The source scaling and seismic productivity of slow slip transients." Science Advances 7, no. 32 (2021): eabg9718. http://dx.doi.org/10.1126/sciadv.abg9718.

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Slow slip events (SSEs) represent a slow faulting process leading to aseismic strain release often accompanied by seismic tremor or earthquake swarms. The larger SSEs last longer and are often associated with intense and energetic tremor activity, suggesting that aseismic slip controls tremor genesis. A similar pattern has been observed for SSEs that trigger earthquake swarms, although no comparative studies exist on the source parameters of SSEs and tremor or earthquake swarms. We analyze the source scaling of SSEs and associated tremor- or swarm-like seismicity through our newly compiled dat

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2

Gambino, Salvatore, and Giovanni Distefano. "Intrusive Seismic Swarms as Possible Precursors of Destructive Earthquakes on Mt. Etna’s Eastern Flank." International Journal of Geophysics 2022 (February 7, 2022): 1–10. http://dx.doi.org/10.1155/2022/8565536.

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The Timpe Fault System (TFS) represents the source of shallow earthquakes that strike numerous towns and villages on Mt. Etna’s eastern flank. In the last 40 years, three destructive seismic events reached I 0 = VIII EMS (heavily damaging) in 1984 (October 25), 2002 (October 29), and 2018 (December 26). These events followed a few days after the occurrence of strong seismic swarms and the sudden acceleration of the eastern flank seaward. The damaging seismic events in 2002 and 2018 were associated with dike intrusions and eruptions of the volcano; however, no eruptive activity was observed at

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3

Magee, Craig, and Christopher Aiden-Lee Jackson. "Seismic reflection data reveal the 3D structure of the newly discovered Exmouth Dyke Swarm, offshore NW Australia." Solid Earth 11, no. 2 (2020): 579–606. http://dx.doi.org/10.5194/se-11-579-2020.

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Abstract. Dyke swarms are common on Earth and other planetary bodies, comprising arrays of dykes that can extend laterally for tens to thousands of kilometres. The vast extent of such dyke swarms, and their presumed rapid emplacement, means they can significantly influence a variety of planetary processes, including continental break-up, crustal extension, resource accumulation, and volcanism. Determining the mechanisms driving dyke swarm emplacement is thus critical to a range of Earth Science disciplines. However, unravelling dyke swarm emplacement mechanics relies on constraining their 3D s

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4

Horálek, Josef, and Tomás Fischer. "Intraplate earthquake swarms in West Bohemia/Vogtland (Central Europe)." Jökull 60, no. 1 (2010): 67–87. http://dx.doi.org/10.33799/jokull2010.60.067.

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West Bohemia (Czech Republic) and Vogtland (Germany) are among the most active intraplate earthquake-swarm areas in Europe with the largest events mostly of magnitudes $M_L$ \< 4.0. The principal char-acteristics of the West Bohemia/Vogtland earthquake swarms are derived on the basis of local observations from the network WEBNET during the period between 1991 and 2009. Swarm microearthquakes clustered in number of small focal areas; however, about 90\% of the total seismic moment was released in the Nový Kostel (NK) focal zone, which was formed by an NNW striking and steeply dipping fault p

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Sycheva, N. A., and L. M. Bogomolov. "Modified data on geoeffective solar flares and seismic noise variations." IOP Conference Series: Earth and Environmental Science 929, no. 1 (2021): 012033. http://dx.doi.org/10.1088/1755-1315/929/1/012033.

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Abstract The problem of the relationship between strong magnetic swarms caused by solar flares and variations in seismicity is considered. The data on the temporal dependences of the parameters of seismic noise (average level, and standard deviation, RMS) recorded by the stations of the KNET seismic network have been used as the output data of monitoring the territory of the Bishkek geodynamic proving ground (Northern Tien Shan). The signatures of the influence of a magnetic swarm that occurred after an ultra-strong solar flare on September 6, 2017 have been established. The results obtained o

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Ingale, Vaibhav Vijay, Sara Bazin, and Jean-Yves Royer. "Hydroacoustic Observations of Two Contrasted Seismic Swarms along the Southwest Indian Ridge in 2018." Geosciences 11, no. 6 (2021): 225. http://dx.doi.org/10.3390/geosciences11060225.

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In 2018, two earthquake swarms occurred along spreading ridge segments of the ultra-slow Southwest Indian Ridge (SWIR). The first swarm was located at the spreading-ridge intersection with the Novara Fracture Zone, comprising 231 events (ISC catalogue) and spanning over 6 days (10 July to 15 July). The second swarm was more of a cluster of events focusing near a discontinuity, 220 km west of the Rodrigues Triple Junction, composed of 92 events and spanning over 31 days (27 September to 27 October). We examined these two swarms using hydroacoustic records from the OHASISBIO network with seven t

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7

Grocholski, Brent. "Seismic swarms show the structure." Science 368, no. 6497 (2020): 1324.1–1324. http://dx.doi.org/10.1126/science.368.6497.1324-a.

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8

Bellucci Sessa, Eliana, Mario Castellano, and Patrizia Ricciolino. "GIS applications in volcano monitoring: the study of seismic swarms at the Campi Flegrei volcanic complex, Italy." Advances in Geosciences 52 (February 23, 2021): 131–44. http://dx.doi.org/10.5194/adgeo-52-131-2021.

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Abstract. Campi Flegrei caldera (Southern Italy) is one of the most hazardous volcanic complexes in the world since it is located inside the densely inhabited urban district of Naples-Pozzuoli. In the past, the caldera has produced devastating to moderate eruptions and periodically undergoes from strong to minor uplift episodes, named “bradyseism”, almost always accompanied by seismic swarms. Starting from 2005 Campi Flegrei has undergone an unrest crisis, characterized by ground uplift, localized gas emissions and seismicity, often occurring in seismic swarms. As a consequence, the monitoring

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9

Liu, Yajing, Jeffrey J. McGuire, and Mark D. Behn. "Aseismic transient slip on the Gofar transform fault, East Pacific Rise." Proceedings of the National Academy of Sciences 117, no. 19 (2020): 10188–94. http://dx.doi.org/10.1073/pnas.1913625117.

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Oceanic transform faults display a unique combination of seismic and aseismic slip behavior, including a large globally averaged seismic deficit, and the local occurrence of repeating magnitude (M) ∼6 earthquakes with abundant foreshocks and seismic swarms, as on the Gofar transform of the East Pacific Rise and the Blanco Ridge in the northeast Pacific Ocean. However, the underlying mechanisms that govern the partitioning between seismic and aseismic slip and their interaction remain unclear. Here we present a numerical modeling study of earthquake sequences and aseismic transient slip on ocea

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10

Eyre, Thomas S., Megan Zecevic, Rebecca O. Salvage, and David W. Eaton. "A Long-Lived Swarm of Hydraulic Fracturing-Induced Seismicity Provides Evidence for Aseismic Slip." Bulletin of the Seismological Society of America 110, no. 5 (2020): 2205–15. http://dx.doi.org/10.1785/0120200107.

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ABSTRACT Seismic swarms are defined as an increase in seismicity that does not show a clear mainshock–aftershock sequence. Typically, swarms are primarily associated with either fluid migration or slow earthquakes (aseismic slip). In this study, we analyze a swarm induced by hydraulic fracturing (HF) that persisted for an unusually long duration of more than 10 months. Swarms ascribed to fluid injection are usually characterized by an expanding seismicity front; in this case, however, characteristics such as a relatively steady seismicity rate over time and lack of hypocenter migration cannot

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11

Govoni, Aladino, Luigi Passarelli, Thomas Braun, et al. "Investigating the Origin of Seismic Swarms." Eos, Transactions American Geophysical Union 94, no. 41 (2013): 361–62. http://dx.doi.org/10.1002/2013eo410001.

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12

Kriegerowski, Marius, Simone Cesca, Matthias Ohrnberger, Torsten Dahm, and Frank Krüger. "Event couple spectral ratio <i>Q</i> method for earthquake clusters: application to northwest Bohemia." Solid Earth 10, no. 1 (2019): 317–28. http://dx.doi.org/10.5194/se-10-317-2019.

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Abstract. We develop an amplitude spectral ratio method for event couples from clustered earthquakes to estimate seismic wave attenuation (Q−1) in the source volume. The method allows to study attenuation within the source region of earthquake swarms or aftershocks at depth, independent of wave path and attenuation between source region and surface station. We exploit the high-frequency slope of phase spectra using multitaper spectral estimates. The method is tested using simulated full wave-field seismograms affected by recorded noise and finite source rupture. The synthetic tests verify the

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13

Llenos, Andrea L., Jeffrey J. McGuire, and Yosihiko Ogata. "Modeling seismic swarms triggered by aseismic transients." Earth and Planetary Science Letters 281, no. 1-2 (2009): 59–69. http://dx.doi.org/10.1016/j.epsl.2009.02.011.

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14

Alexandrakis, C., M. Calò, F. Bouchaala, and V. Vavryčuk. "Velocity structure and the role of fluids in the West Bohemia Seismic Zone." Solid Earth 5, no. 2 (2014): 863–72. http://dx.doi.org/10.5194/se-5-863-2014.

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Abstract. In this study, we apply the double-difference tomography to investigate the detailed 3-D structure within and around the Nový Kostel Seismic Zone, an area in the Czech Republic known for frequent occurrences of earthquake swarms. We use data from the 2008 swarm since it has already been analysed in terms of earthquake focal mechanisms, principal faults, tectonic stress and foci migration. We selected about 500 microearthquakes recorded at 22 local seismic stations of the West Bohemia seismic monitoring network (WEBNET). Applying double-difference tomography, combined with weighted av

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15

De Angelis, S. "Seismic source displacement by coda wave interferometry at Soufrière Hills Volcano, Montserrat, WI." Natural Hazards and Earth System Sciences 9, no. 4 (2009): 1341–47. http://dx.doi.org/10.5194/nhess-9-1341-2009.

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Abstract. Since the start of the ongoing eruption, on 18 July 1995, the Soufrière Hills Volcano (SHV) on Montserrat, WI, has been monitored with a network of seismometers providing an unparalleled wealth of observations. A recurrent and intriguing feature of the seismicity at SHV is the occurrence of regular swarms of low-frequency earthquakes during episodes of volcanic unrest. A notable example of this type of activity was recorded during the summer of 2008 when SHV erupted, on 29 July, following 15 days of seismic unrest. An impressive swarm of low-frequency earthquakes with strikingly simi

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Fojtíková, Lucia, and Václav Vavryčuk. "Tectonic stress regime in the 2003–2004 and 2012–2015 earthquake swarms in the Ubaye Valley, French Alps." Pure and Applied Geophysics 175, no. 6 (2018): 1997–2008. http://dx.doi.org/10.1007/s00024-018-1792-2.

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Abstract We study two earthquake swarms that occurred in the Ubaye Valley, French Alps within the past decade: the 2003–2004 earthquake swarm with the strongest shock of magnitude ML = 2.7, and the 2012–2015 earthquake swarm with the strongest shock of magnitude ML = 4.8. The 2003–2004 seismic activity clustered along a 9-km-long rupture zone at depth between 3 and 8 km. The 2012–2015 activity occurred a few kilometres to the northwest from the previous one. We applied the iterative joint inversion for stress and fault orientations developed by Vavryčuk (2014) to focal mechanisms of 74 events

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17

Fischer, Tomáš, Josef Vlček, and Martin Lanzendörfer. "Monitoring crustal CO<sub>2</sub> flow: methods and their applications to the mofettes in West Bohemia." Solid Earth 11, no. 3 (2020): 983–98. http://dx.doi.org/10.5194/se-11-983-2020.

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Abstract. Monitoring of CO2 degassing in seismoactive areas allows the study of correlations of gas release and seismic activity. Reliable continuous monitoring of the gas flow rate in rough field conditions requires robust methods capable of measuring gas flow at different types of gas outlets such as wet mofettes, mineral springs, and boreholes. In this paper we focus on the methods and results of the long-term monitoring of CO2 degassing in the West Bohemia/Vogtland region in central Europe, which is typified by the occurrence of earthquake swarms and discharge of carbon dioxide of magmatic

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18

Chochlaki, Kalliopi, Georgios Michas, and Filippos Vallianatos. "Complexity of the Yellowstone Park Volcanic Field Seismicity in Terms of Tsallis Entropy." Entropy 20, no. 10 (2018): 721. http://dx.doi.org/10.3390/e20100721.

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The Yellowstone Park volcanic field is one of the most active volcanic systems in the world, presenting intense seismic activity that is characterized by several earthquake swarms over the last decades. In the present work, we focused on the spatiotemporal properties of the recent earthquake swarms that occurred on December–January 2008–2009 and the 2010 Madison Plateau swarm, using the approach of Non Extensive Statistical Physics (NESP). Our approach is based on Tsallis entropy, and is used in order to describe the behavior of complex systems where fracturing and strong correlations exist, s

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19

Alexandrakis, C., M. Calò, F. Bouchaala, and V. Vavryčuk. "Velocity structure and the role of fluids in the West Bohemia Seismic Zone." Solid Earth Discussions 6, no. 1 (2014): 511–34. http://dx.doi.org/10.5194/sed-6-511-2014.

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Abstract. In this study, we apply the double-difference tomography method to investigate the detailed 3-D structure within and around the Nový Kostel seismic zone, an area in the Czech Republic known for frequent occurrences of earthquake swarms. We use data from the extensively analyzed 2008 swarm, which has known focal mechanisms, principal faults, tectonic stress, source migration and other basic characteristics. We selected about 500 microearthquakes recorded at 22 local seismic stations of the West Bohemia Network (WEBNET). Applying double-difference tomography, combined with Weighted Ave

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20

Bachura, M., T. Fischer, J. Doubravová, and J. Horálek. "From earthquake swarm to a main shock–aftershocks: the 2018 activity in West Bohemia/Vogtland." Geophysical Journal International 224, no. 3 (2020): 1835–48. http://dx.doi.org/10.1093/gji/ggaa523.

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SUMMARY In earthquake swarms, seismic energy is released gradually by many earthquakes without a dominant event, which offers detailed insight into the processes on activated faults. The swarm of May 2018 that occurred in West Bohemia/Vogtland region included more than 4000 earthquakes with ML =〈0.5, 3.8&x3009 x232A;and its character showed significant changes during the two weeks duration: what started as a pure earthquake swarm ended as a typical main shock–aftershock sequence. Based on precise double-difference relocations, four fault segments differing in strikes and dips were identifi

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21

Valenzuela-Malebrán, Carla, Simone Cesca, Sergio Ruiz, et al. "Seismicity clusters in Central Chile: investigating the role of repeating earthquakes and swarms in a subduction region." Geophysical Journal International 224, no. 3 (2020): 2028–43. http://dx.doi.org/10.1093/gji/ggaa562.

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SUMMARY Seismicity along subduction interfaces is usually dominated by large main-shock–aftershock sequences indicative of a continuum distribution of highly coupled large asperities. In the past decades, however, the increased resolution of seismic catalogues at some subduction zone seems to indicate instead a more complex rheological segmentation of the interface. Large and megathrust earthquake ruptures seem interspersed among regions of low seismic coupling and less stress buildup. In this weaker zone, the strain is primarily released via a combination of moderate-size swarm-like seismicit

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22

SRIVASTAVA, H. N., S. N. BHATTACHARYA, D. T. RAO, and S. SRIVASTAVA. "Strange attractor in earthquake swarms near Valsad (Gujarat), India." MAUSAM 58, no. 4 (2021): 543–50. http://dx.doi.org/10.54302/mausam.v58i4.1439.

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Valsad district in south Gujarat near the western coast of the peninsular India experienced earthquake swarms since early February 1986. Seismic monitoring through a network of micro earthquake seismographs showed a well concentrated seismic activity over an area of 7 × 10 km2 with the depth of foci extending from 1 to 15 km. A total number of 21,830 earthquakes were recorded during March 1986 to June 1988. The daily frequency of earthquakes for this period was utilized to examine deterministic chaos through evaluation of dimension of strange attractor and Lyapunov exponent. The low dimension

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23

Ventura-Valentín, Wilnelly, and Michael R. Brudzinski. "Characterization of Swarm and Mainshock–Aftershock Behavior in Puerto Rico." Seismological Research Letters 93, no. 2A (2022): 641–52. http://dx.doi.org/10.1785/0220210329.

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Abstract The recent Indios, Puerto Rico earthquake sequence has drawn attention, as the increased seismicity rate in this area was unprecedented. The sequence began on 28 December 2019, caused a 6.4 magnitude earthquake on 7 January 2020, and remained active over a year later. This sequence fits the nominal definition of an earthquake swarm in that it had an abrupt onset, a sustained high rate of seismicity without a clear triggering mainshock or evidence for Omori decay, and a lack of adherence to Bath’s law. However, the sequence also had several prominent mainshock–aftershock (MS–AS) sequen

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24

CARUSO, FILIPPO, SERGIO VINCIGUERRA, VITO LATORA, ANDREA RAPISARDA, and STEPHEN MALONE. "MULTIFRACTAL ANALYSIS OF MOUNT St. HELENS SEISMICITY AS A TOOL FOR IDENTIFYING ERUPTIVE ACTIVITY." Fractals 14, no. 03 (2006): 179–86. http://dx.doi.org/10.1142/s0218348x06003180.

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We present a multifractal analysis of Mount St. Helens seismic activity during 1980–2002. The seismic time distribution is studied in relation to the eruptive activity, mainly marked by the 1980 major explosive eruptions and by the 1980–1986 dome building eruptions. The spectrum of the generalized fractal dimensions, i.e. Dq versus q, extracted from the data, allows us to identify two main earthquake time distribution patterns. The first one exhibits a multifractal clustering correlated to the intense seismic swarms of the dome building activity. The second one is characterized by an almost co

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Ulfiana, Emi, Wandono Wandono, Dimas Salomo Sianipar та Nova Heryandoko. "Study of P and S Wave Quality Factor (Qα and Qβ) Around Mt. Jailolo". Jurnal Geofisika 18, № 2 (2020): 33. http://dx.doi.org/10.36435/jgf.v18i2.437.

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Mt. Jailolo is a B type volcano that has never erupted after 1600. Seismic activities around Mt. Jailolo have never been recorded until the swarm in November 2015. Several studies have been done to determine thecause of the swarm, but it is not certain whether the cause of the swarm is tectonic or volcanic activities. The study of attenuation characteristics has never been carried out in the area around Mt. Jailolo. Attenuation characteristics are important to provide the medium information which seismic waves pass through and it can also be applied to the volcanic areas as preliminary disaste

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26

Sardeli, Eirini, Georgios Michas, Kyriaki Pavlou, Filippos Vallianatos, Andreas Karakonstantis, and Georgios Chatzopoulos. "Complexity of Recent Earthquake Swarms in Greece in Terms of Non-Extensive Statistical Physics." Entropy 25, no. 4 (2023): 667. http://dx.doi.org/10.3390/e25040667.

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Greece exhibits the highest seismic activity in Europe, manifested in intense seismicity with large magnitude events and frequent earthquake swarms. In the present work, we analyzed the spatiotemporal properties of recent earthquake swarms that occurred in the broader area of Greece using the Non-Extensive Statistical Physics (NESP) framework, which appears suitable for studying complex systems. The behavior of complex systems, where multifractality and strong correlations among the elements of the system exist, as in tectonic and volcanic environments, can adequately be described by Tsallis e

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27

Morozov, Alexey Nikolaevich, Natalya V. Vaganova, Galina N. Antonovskaya, et al. "Low-Magnitude Earthquakes at the Eastern Ultraslow-Spreading Gakkel Ridge, Arctic Ocean." Seismological Research Letters 92, no. 4 (2021): 2221–33. http://dx.doi.org/10.1785/0220200308.

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Abstract Thanks to the new permanent seismic stations installed in the Franz Joseph Land and Severnaya Zemlya arctic archipelagoes, it has become possible at present to record earthquakes occurring in the eastern Gakkel ridge with a much lower detection threshold than that provided by the global network. At present, the lowest recorded magnitude is ML 2.4 and the magnitude of completeness is 3.4. We examined the results of seismic monitoring conducted from December 2016 through January 2020 to show that the earthquake epicenters are not uniformly distributed both in space and over time within

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Carpinteri, Alberto, and Oscar Borla. "Acoustic, electromagnetic, and neutron emissions as seismic precursors: The lunar periodicity of low-magnitude seismic swarms." Engineering Fracture Mechanics 210 (April 2019): 29–41. http://dx.doi.org/10.1016/j.engfracmech.2018.04.021.

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29

Wakita, Hiroshi, Yuji Sano, and Megumi Mizoue. "High3He emanation and seismic swarms observed in a nonvolcanic, forearc region." Journal of Geophysical Research 92, B12 (1987): 12539. http://dx.doi.org/10.1029/jb092ib12p12539.

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30

De Gori, P., F. P. Lucente, and C. Chiarabba. "Stressing of fault patch during seismic swarms in central Apennines, Italy." Geophysical Research Letters 42, no. 7 (2015): 2157–63. http://dx.doi.org/10.1002/2015gl063297.

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31

Ren, Tao, Xinliang Liu, Hongfeng Chen, et al. "Seismic severity estimation using convolutional neural network for earthquake early warning." Geophysical Journal International 234, no. 2 (2023): 1355–62. http://dx.doi.org/10.1093/gji/ggad137.

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SUMMARY In this study, magnitude estimation in earthquake early warning (EEW) systems is seen as a classification problem: the single-channel waveform, starting from the P-wave onset and lasting 4 s, is given in the input, and earthquake severity (medium and large earthquakes: local magnitude (ML) ≥ 5; small earthquakes: ML &lt; 5) is the classification result. The convolutional neural network (CNN) is proposed to estimate the severity of the earthquake, which is composed of several blocks that can extract the latent representation of the input from different receptive fields automatically

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BEZERRA, FRANCISCO HILÁRIO REGO, VANILDO PEREIRA DA FONSCECA, and FRANCISCO PINHEIRO LIMA FILHO. "Seismites: origin, criteria of identification and examples from the Quaternary record of Northeastern Brasil." Pesquisas em Geociências 28, no. 2 (2001): 205. http://dx.doi.org/10.22456/1807-9806.20295.

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Seismites are soft-sediment features produced by (paleo)earthquakes. They are formed after sediment deposition, before sediment compaction, and during sudden breakdown of a loosely packet, water saturated grain framework. Fundamental controls on seismite generation are exerted mainly by earthquake size, sediment properties, and water-table depth. Hydroplastic deformation, liquefaction, and fluidization are the three mechanisms related to seismite origin. The most common types of seismites are hydroplastic mixing layers, pillars, pockets, dikes, sills, and folds. Outcrop features are among the

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Leva, Carola, Georg Rümpker, and Ingo Wölbern. "Remote monitoring of seismic swarms and the August 2016 seismic crisis of Brava, Cabo Verde, using array methods." Natural Hazards and Earth System Sciences 20, no. 12 (2020): 3627–38. http://dx.doi.org/10.5194/nhess-20-3627-2020.

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Abstract. During the first two days of August 2016 a seismic crisis occurred on Brava, Cabo Verde, which – according to observations based on a local seismic network – was characterized by more than a thousand volcano-seismic signals. Brava is considered an active volcanic island, although it has not experienced any historic eruptions. Seismicity significantly exceeded the usual level during the crisis. We report on results based on data from a temporary seismic-array deployment on the neighbouring island of Fogo at a distance of about 35 km. The array was in operation from October 2015 to Dec

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Bassis, Jeremy N., Helen A. Fricker, Richard Coleman, et al. "Seismicity and deformation associated with ice-shelf rift propagation." Journal of Glaciology 53, no. 183 (2007): 523–36. http://dx.doi.org/10.3189/002214307784409207.

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Previous observations have shown that rift propagation on the Amery Ice Shelf (AIS), East Antarctica, is episodic, occurring in bursts of several hours with typical recurrence times of several weeks. Propagation events were deduced from seismic swarms (detected with seismometers) concurrent with rapid rift widening (detected with GPS receivers). In this study, we extend these results by deploying seismometers and GPS receivers in a dense network around the tip of a propagating rift on the AIS over three field seasons (2002/03, 2004/05 and 2005/06). The pattern of seismic event locations shows

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Saccorotti, Gilberto, Francesca Bianco, Mario Castellano, and Edoardo Del Pezzo. "The July-August 2000 seismic swarms at Campi Flegrei Volcanic Complex, Italy." Geophysical Research Letters 28, no. 13 (2001): 2525–28. http://dx.doi.org/10.1029/2001gl013053.

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Lengliné, O., J. E. Elkhoury, G. Daniel, et al. "Interplay of seismic and aseismic deformations during earthquake swarms: An experimental approach." Earth and Planetary Science Letters 331-332 (May 2012): 215–23. http://dx.doi.org/10.1016/j.epsl.2012.03.022.

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Nava, F. Alejandro, and Ewa Glowacka. "Automatic identification of seismic swarms and other spatio-temporal clustering from catalogs." Computers & Geosciences 20, no. 5 (1994): 797–820. http://dx.doi.org/10.1016/0098-3004(94)90114-7.

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Amato, Jeffrey M., Elizabeth L. Miller, James E. Wright, and William C. McIntosh. "Dike swarms on Seward Peninsula, Alaska, and their implications for the kinematics of Cretaceous extension in the Bering Strait region." Canadian Journal of Earth Sciences 40, no. 6 (2003): 865–86. http://dx.doi.org/10.1139/e03-019.

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Late Cretaceous dike swarms on Seward Peninsula, northwestern Alaska, represent the youngest local manifestation of a ~11575 Ma magmatic event in the Bering Strait region. Magmatism accompanied and followed high-grade metamorphism and ductile deformation. A Late Cretaceous extensional tectonic setting for the region is suggested by the thickness and seismic-reflection characteristics of the crust, regional basin development, formation of high-strain tectonites with subhorizontal foliations, bimodal magmatism, and dike swarms. The orientation of the dike swarms is used to address the kinematic

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39

Fischer, Tomáš, Pavla Hrubcová, Torsten Dahm, et al. "ICDP drilling of the Eger Rift observatory: magmatic fluids driving the earthquake swarms and deep biosphere." Scientific Drilling 31 (October 28, 2022): 31–49. http://dx.doi.org/10.5194/sd-31-31-2022.

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Abstract. The new in situ geodynamic laboratory established in the framework of the ICDP Eger project aims to develop the most modern, comprehensive, multiparameter laboratory at depth for studying earthquake swarms, crustal fluid flow, mantle-derived CO2 and helium degassing, and processes of the deep biosphere. In order to reach a new level of high-frequency, near-source and multiparameter observation of earthquake swarms and related phenomena, such a laboratory comprises a set of shallow boreholes with high-frequency 3-D seismic arrays as well as modern continuous real-time fluid monitoring

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Dutta, Pradyumna, Sunil Kumar Singh, Jarrah Al-Genai, Azhar Akhtar, and Mahmood Akbar. "An Approach to Fracture Characterization Using Borehole Seismic Data." SPE Reservoir Evaluation & Engineering 12, no. 03 (2009): 371–79. http://dx.doi.org/10.2118/105427-pa.

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Summary The Najmah, Sargelu, and Marrat reservoirs are the main Jurassic reservoirs in Kuwait. These fractured-carbonate reservoirs that have moderate-to-low porosity were deposited in an inner- to midramp warm marine environment. The fracture systems play a significant role in production in these reservoirs, and it is essential to identify areas of high fracture density. It has been observed that fractures associated with certain faults have facilitated the flow in the Jurassic reservoirs. Identification of faults and associated fractures mainly has been on the basis of 3D-/2D-seismic data, i

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Merzlikin, Dmitrii, and Sergey Fomel. "Analytical path-summation imaging of seismic diffractions." GEOPHYSICS 82, no. 1 (2017): S51—S59. http://dx.doi.org/10.1190/geo2016-0140.1.

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Diffraction imaging aims to emphasize small subsurface objects, such as faults, fracture swarms, and channels. Similar to classical reflection imaging, velocity analysis is crucially important for accurate diffraction imaging. Path-summation migration provides an imaging method that produces an image of the subsurface without picking a velocity model. Previous methods of path-summation imaging involve a discrete summation of the images corresponding to all possible migration velocity distributions within a predefined integration range and thus involve a significant computational cost. We have

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Svejdar, V., H. Küchenhoff, L. Fahrmeir, and J. Wassermann. "External forcing of earthquake swarms at Alpine regions: example from a seismic meteorological network at Mt. Hochstaufen SE-Bavaria." Nonlinear Processes in Geophysics 18, no. 6 (2011): 849–60. http://dx.doi.org/10.5194/npg-18-849-2011.

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Abstract. In the last few years, it has been shown that above-average rainfall and the following diffusion of excess water into subsurface structures is able to trigger earthquake swarms in the uppermost brittle portion of the Earth's crust. However, there is still an ongoing debate on whether the crust already needs to be in a critical-to-failure state or whether it is sufficient that water is transported rapidly within channels and veins of karst or similar geological formations to the underlying, earthquake-generating layers. Also unknown is the role of other forcing mechanisms, possible co

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Mesimeri, M., E. Papadimitriou, V. Karakostas, and G. Tsaklidis. "Earthquake clusters in NW Peloponnese." Bulletin of the Geological Society of Greece 47, no. 3 (2016): 1167. http://dx.doi.org/10.12681/bgsg.10972.

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Clusters commonly occur as main shock – aftershock (MS-AS) sequences but also as earthquake swarms, which are empirically defined as an increase in seismicity rate above the background rate without a clear main shock. A delcustering algorithm is employed to identify clusters from a complete catalog of earthquakes that occurred in the area of NW Peloponnese (Greece) during 1980-2007. In order to distinguish these clusters we calculate the skewness and kurtosis of seismic moment release for each cluster, since swarm-like sequences generally have lower skew value of moment release history than MS

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Maeda, Takuto, Kazushige Ohara, and Yohei Yukutake. "Seismic velocity decrease and recovery related to earthquake swarms in a geothermal area." Earth, Planets and Space 62, no. 9 (2010): 685–91. http://dx.doi.org/10.5047/eps.2010.08.006.

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Cebry, Sara Beth L., and Gregory C. McLaskey. "Seismic swarms produced by rapid fluid injection into a low permeability laboratory fault." Earth and Planetary Science Letters 557 (March 2021): 116726. http://dx.doi.org/10.1016/j.epsl.2020.116726.

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Saccorotti, Gilberto, Guido Ventura, and Giuseppe Vilardo. "Seismic swarms related to diffusive processes: The case of Somma‐Vesuvius volcano, Italy." GEOPHYSICS 67, no. 1 (2002): 199–203. http://dx.doi.org/10.1190/1.1451551.

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Novotný, Oldřich. "A preliminary seismic model for the region of the west-Bohemian earthquake swarms." Studia Geophysica et Geodætica 40, no. 4 (1996): 353–66. http://dx.doi.org/10.1007/bf02300764.

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PRAKASH, RAJESH, S. K. SRIVASTAV, H. V. GUPTA, and H. N. SRIVASTAVA. "Spatio temporal seismicity variation in earthquakes of Uttaranchal region." MAUSAM 55, no. 4 (2022): 681–90. http://dx.doi.org/10.54302/mausam.v55i4.1402.

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The spatio temporal variations of seismicity preceding Uttarkashi, 1991 and Chamoli, 1999 earthquakes were studied based on the data during the period 1981 to 2000 using the catalogues of earthquakes prepared by the India Meteorological Department. Two scenarios were examined. In one case the epicentral distance from the respective impending earthquakes were worked out for all the earthquakes recorded during a ten years period prior to the earthquake of Uttarkashi and Chamoli respectively. In the other case, the epicenter near latitude 30.2° N and longitude 80.2° E near India Nepal border (whe

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Wang, Binhao, and Sylvain Barbot. "Pulse-like ruptures, seismic swarms, and tremorgenic slow-slip events with thermally activated friction." Earth and Planetary Science Letters 603 (February 2023): 117983. http://dx.doi.org/10.1016/j.epsl.2022.117983.

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Gabsatarova, I. P., B. A. Assinovskaya, S. V. Baranov, et al. "SEISMICITY of the RUSSIAN PART of EAST EUROPEAN PLATFORM and ADJACENT TERRITORIES in 2016–2017." Earthquakes in Northern Eurasia, no. 25 (December 20, 2022): 196–205. http://dx.doi.org/10.35540/1818-6254.2022.25.17.

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Seismic observations by 46 stationary seismic stations, including seven temporary seismic stations located in the area of Novovoronezh and Kursk nuclear power plants, and by two arrays were carried out on the Russian territory of the East European Platform. A feature of seismicity in 2016–2017 is a manifestation of swarms of weak earthquakes in the northwest in the Leningrad region and the adjacent territory of Finland, as well as earthquakes on the Ukrainian Shield with Мs(est.)=3.8 in Krivoy Rog, where mass explosions are carried out in mines, but earthquakes of moderate magnitude МL=2.6–3.9

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