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Journal articles on the topic 'Crustal scattering'

Author: Grafiati

Published: 10 March 2023

Last updated: 31 July 2025

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1

Leary, P. C. "Quantifying crustal fracture heterogeneity by seismic scattering." Geophysical Journal International 122, no. 1 (1995): 125–42. http://dx.doi.org/10.1111/j.1365-246x.1995.tb03541.x.

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2

Sahroni, Anang, Leni Sophia Heliani, Cecep Pratama, Hidayat Panuntun, and Wiwit Suryanto. "Preliminary result for crustal properties derivation related to tectonics for hazard mitigation in Eastern Indonesia using Teleseismic P Coda." E3S Web of Conferences 325 (2021): 01012. http://dx.doi.org/10.1051/e3sconf/202132501012.

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Eastern Indonesia is tectonically complex, formed by different plates and microplates interactions from different origins. This complexity gives geoscientists a challenge to solve the ’jigsaw’ of the complex interactions. The understanding of tectonic processes can lead to a breakthrough in both resource exploration and disaster risk reduction. We utilize teleseismic P wave coda for random coda from scattering and deterministic coda originated from the crust-mantle boundary (Moho) to derive the crustal properties, including thickness, Vp/Vs, and qualitative scattering characteristics. For the

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3

Hearn, Thomas Martin. "Global Rayleigh Wave Attenuation and Group Velocity from International Seismological Centre Data." Geosciences 14, no. 2 (2024): 50. http://dx.doi.org/10.3390/geosciences14020050.

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This paper presents a study of global Rayleigh wave attenuation and group velocity at a period of around 20 s using data from the International Seismological Centre (ISC) bulletin. Rayleigh waves at this period are sensitive to the crustal structure beneath continents and the uppermost mantle beneath oceans. Tomographic imaging reveals strong continental-ocean contrasts due to this. Oceanic group velocities are high but vary with seafloor depth, while oceanic attenuation shows mid-ocean ridges. Subduction zone regions display high attenuation but little velocity reduction, indicating scatterin

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4

Morozov, I. B. "Crustal Scattering and Some Artifacts in Receiver Function Images." Bulletin of the Seismological Society of America 94, no. 4 (2004): 1492–99. http://dx.doi.org/10.1785/012003117.

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5

Nielsen, L., H. Thybo, I. B. Morozov, S. B. Smithson, and L. Solodilov. "TeleseismicPnarrivals: influence of mantle velocity gradient and crustal scattering." Geophysical Journal International 152, no. 2 (2003): F1—F7. http://dx.doi.org/10.1046/j.1365-246x.2003.01873.x.

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6

Hearn, Thomas M. "Crustal attenuation from USArray ML amplitude tomography." Geophysical Journal International 224, no. 1 (2020): 199–206. http://dx.doi.org/10.1093/gji/ggaa445.

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SUMMARY Seismic attenuation across the US is estimated using station ML magnitude data from the USArray. Station magnitudes are recalibrated back to amplitude and back projected in a 2-D tomography. Data represent the amplitudes of the horizontal components of the Lg phase. The western US shows regions of very high attenuation and contrasts with the lesser attenuation of the eastern US. Individual attenuation anomalies can be clearly tied to regional geology. Station gains show broad regional variations that match geographic regions. Most of the high-attenuation areas are regions of high geoth

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7

Przybilla, Jens, Ulrich Wegler, and Michael Korn. "Estimation of crustal scattering parameters with elastic radiative transfer theory." Geophysical Journal International 178, no. 2 (2009): 1105–11. http://dx.doi.org/10.1111/j.1365-246x.2009.04204.x.

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8

Bertrand, E., A. Deschamps, and J. Virieux. "Crustal structure deduced from receiver functions via single-scattering migration." Geophysical Journal International 150, no. 2 (2002): 524–41. http://dx.doi.org/10.1046/j.1365-246x.2002.01723.x.

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9

Revenaugh, Justin. "The relation of crustal scattering to seismicity in southern California." Journal of Geophysical Research: Solid Earth 105, B11 (2000): 25403–22. http://dx.doi.org/10.1029/2000jb900304.

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10

Jordan, Thomas H. "Crustal Structure of Southern California from Velocity and Attenuation Tomography." Annals of Geophysics 67 (October 9, 2024): S429. http://dx.doi.org/10.4401/ag-9149.

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Recent studies of Southern California have employed velocity and attenuation tomography to elucidate two aspects of crustal structure. Low-frequency velocity tomography reveals large-scale heterogeneity that can be approximated by a discrete set (𝐾 ≤ 10) of tectonic regions, each characterized by an isostatically balanced lithospheric column reflecting the composition and tectonic history of the region. The boundaries between tectonic regions are typically localized structures expressed at the surface by major faults, topographic fronts, and geochemical transitions. The efficacy with which tom

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11

Ebel, John E. "The effect of crustal scattering on observed high-frequency earthquake seismograms." Geophysical Journal International 98, no. 2 (1989): 329–41. http://dx.doi.org/10.1111/j.1365-246x.1989.tb03356.x.

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12

Rost, S., G. A. Houseman, A. W. Frederiksen, et al. "Structure of the northwestern North Anatolian Fault Zone imaged via teleseismic scattering tomography." Geophysical Journal International 227, no. 2 (2021): 922–40. http://dx.doi.org/10.1093/gji/ggab265.

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SUMMARY Information on fault zone structure is essential for our understanding of earthquake mechanics, continental deformation and seismic hazard. We use the scattered seismic wavefield to study the subsurface structure of the North Anatolian Fault Zone (NAFZ) in the region of the 1999 İzmit and Düzce ruptures using data from an 18-month dense deployment of seismometers with a nominal station spacing of 7 km. Using the forward- and back-scattered energy that follows the direct P-wave arrival from teleseismic earthquakes, we apply a scattered wave inversion approach and are able to resolve cha

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13

Tao, Jun, Zhisheng Zhang, Yunfei Wu, et al. "Impact of particle number and mass size distributions of major chemical components on particle mass scattering efficiency in urban Guangzhou in southern China." Atmospheric Chemistry and Physics 19, no. 13 (2019): 8471–90. http://dx.doi.org/10.5194/acp-19-8471-2019.

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Abstract. To grasp the key factors affecting particle mass scattering efficiency (MSE), particle mass and number size distribution, PM2.5 and PM10 and their major chemical compositions, and the particle scattering coefficient (bsp) under dry conditions were measured at an urban site in Guangzhou, southern China, during 2015–2016. On an annual average, 10±2 %, 48±7 % and 42±8 % of PM10 mass were in the condensation, droplet and coarse modes, respectively, with mass mean aerodynamic diameters (MMADs) of 0.78±0.07 in the droplet mode and 4.57±0.42 µm in the coarse mode. The identified chemical sp

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14

Audet, P. "Temporal Variations in Crustal Scattering Structure near Parkfield, California, Using Receiver Functions." Bulletin of the Seismological Society of America 100, no. 3 (2010): 1356–62. http://dx.doi.org/10.1785/0120090299.

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15

Rietbrock, A., and F. Scherbaum. "Crustal scattering at the KTB from a combined microearthquake and receiver analysis." Geophysical Journal International 136, no. 1 (1999): 57–67. http://dx.doi.org/10.1046/j.1365-246x.1999.00708.x.

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16

Butler, Rhett. "Bulk, shear and scattering attenuation beneath Hawaiian Volcanos and in the oceanic crust extending to the Aloha Cabled Observatory." Geophysical Journal International 223, no. 1 (2020): 543–60. http://dx.doi.org/10.1093/gji/ggaa309.

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SUMMARY Seismic attenuation is measured from a swarm of 50 earthquakes in Kīlauea volcano in 2018, associated with caldera collapse. The traverse extends at nearly constant azimuth to the saddle between Mauna Loa and Mauna Kea, continuing to Maui beneath the distal flanks of three dormant volcanos. From Maui the traverse then extends seaward to the Aloha Cabled Observatory (ACO) on the seafloor north of O‘ahu. The effective attenuation is measured with respect to an ${\omega ^{ - 2}}$ earthquake source model. Frequency dependent ${Q_P}$ and ${Q_S}$ are derived. The initial path is shallow and

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17

Pham, N. D., H. Igel, J. Wassermann, M. Kaser, J. de la Puente, and U. Schreiber. "Observations and Modeling of Rotational Signals in the P Coda: Constraints on Crustal Scattering." Bulletin of the Seismological Society of America 99, no. 2B (2009): 1315–32. http://dx.doi.org/10.1785/0120080101.

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18

Rachman, Asep Nur, and Tae Woong Chung. "Depth‐Dependent Crustal Scattering Attenuation Revealed Using Single or Few Events in South Korea." Bulletin of the Seismological Society of America 106, no. 4 (2016): 1499–508. http://dx.doi.org/10.1785/0120150351.

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19

Poppe, A. R., J. S. Halekas, C. Lue, and S. Fatemi. "ARTEMIS observations of the solar wind proton scattering function from lunar crustal magnetic anomalies." Journal of Geophysical Research: Planets 122, no. 4 (2017): 771–83. http://dx.doi.org/10.1002/2017je005313.

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20

Wu, R. S. "Seismic Wave Propagation and Scattering in Heterogeneous Crustal Waveguides Using Screen Propagators: I SH Waves." Bulletin of the Seismological Society of America 90, no. 2 (2000): 401–13. http://dx.doi.org/10.1785/0119990102.

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21

Martini, Francesca, Christopher J. Bean, Sean Dolan, and David Marsan. "Seismic image quality beneath strongly scattering structures and implications for lower crustal imaging: numerical simulations." Geophysical Journal International 145, no. 2 (2001): 423–35. http://dx.doi.org/10.1046/j.1365-246x.2001.01391.x.

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22

Line, C. E. R., R. W. Hobbs, and D. B. Snyder. "Estimates of upper-crustal heterogeneity in the Baltic Shield from seismic scattering and borehole logs." Tectonophysics 286, no. 1-4 (1998): 171–83. http://dx.doi.org/10.1016/s0040-1951(97)00263-1.

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23

Lillis, Robert J., and Xiaohua Fang. "Electron impact ionization in the Martian atmosphere: Interplay between scattering and crustal magnetic field effects." Journal of Geophysical Research: Planets 120, no. 7 (2015): 1332–45. http://dx.doi.org/10.1002/2015je004841.

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24

Eulenfeld, Tom, and Ulrich Wegler. "Crustal intrinsic and scattering attenuation of high-frequency shear waves in the contiguous United States." Journal of Geophysical Research: Solid Earth 122, no. 6 (2017): 4676–90. http://dx.doi.org/10.1002/2017jb014038.

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25

Olsen, Kim B., Michael Begnaud, Scott Phillips, and Bo Holm Jacobsen. "Constraints of Crustal Heterogeneity and Q(f) from Regional (<4 Hz) Wave Propagation for the 2009 North Korea Nuclear Test." Bulletin of the Seismological Society of America 108, no. 3A (2018): 1369–83. http://dx.doi.org/10.1785/0120170195.

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Abstract We carried out 3D finite‐difference (FD) simulations (<4 Hz) of regional wave propagation for the 2009 North Korea nuclear explosion and compared the synthetics with instrument‐corrected records at stations INCN and TJN in South Korea. The source is an isotropic explosion with a moment magnitude of 4.1. Synthetics computed in the relatively smooth Sandia/Los Alamos National Laboratory SALSA3D (SAndia LoS Alamos 3D) velocity model significantly overpredict Rayleigh‐wave amplitudes by more than an order of magnitude while underpredicting coda amplitudes. The addition to SALSA3D of a

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26

Kennett, B. L. N., M. G. Bostock, and J. K. Xie. "Guided-wave tracking in 3-D: A tool for interpreting complex regional seismograms." Bulletin of the Seismological Society of America 80, no. 3 (1990): 633–42. http://dx.doi.org/10.1785/bssa0800030633.

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Abstract The tracking of guided-wave trains by raytracing in 3-D structures can provide a means of interpreting complex seismograms at regional distances. The method relies on the interpretation of Lg as the constructive interference of multiple S reflections within the crust, and strong scattering can be simulated by the inclusion of secondary sources. This approach has been applied to Californian events observed in the southwestern United States whose records at regional distances frequently exhibit an extended and complex Lg coda with significant late energy arriving with group velocities o

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27

Varadan, Vijay K., Akhlesh Lakhtakia, Vasundara V. Varadan, and Charles A. Langston. "Radiation characteristics of elastodynamic line sources buried in layered media with periodic interfaces. I. SH- wave analysis." Bulletin of the Seismological Society of America 77, no. 6 (1987): 2181–91. http://dx.doi.org/10.1785/bssa0770062181.

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Abstract Using the T matrix method, or the extended boundary condition, the solution for a class of problems involving an SH line source in an elastic wave guide is determined. The boundaries of the wave guide may be periodically corrugated and the wave guide may be embedded between elastic media. Numerical results are given for a seismically interesting case of wave propagation in a one-layer crustal model over a mantle half-space with a corrugated free surface representing the Basin and Range topography in the Western United States. Analysis of the scattered fields at the surface, and of the

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28

Dominguez, L. A., F. J. Sanchez-Sesma, and P. M. Davis. "Scattering of Teleseismic Body Waves by the Lateral Crustal Heterogeneity at the Pacific Trench of Mexico." Bulletin of the Seismological Society of America 101, no. 3 (2011): 1281–90. http://dx.doi.org/10.1785/0120100181.

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29

Gaebler, Peter J., Christoph Sens-Schönfelder, and Michael Korn. "The influence of crustal scattering on translational and rotational motions in regional and teleseismic coda waves." Geophysical Journal International 201, no. 1 (2015): 355–71. http://dx.doi.org/10.1093/gji/ggv006.

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30

Zhang, Tianrun, and Thorne Lay. "Effects of crustal structure under the Barents and Kara Seas on short-period regional wave propagation for Novaya Zemlya explosions: Empirical relations." Bulletin of the Seismological Society of America 84, no. 4 (1994): 1132–47. http://dx.doi.org/10.1785/bssa0840041132.

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Abstract Short-period seismic recordings at regional and upper mantle distances from underground explosions at Novaya Zemlya demonstrate that propagation across the continental shelf under the Barents and Kara Seas appears to modify the partitioning of energy between Lg and Sn phases relative to purely continental paths in the Eurasian crust. While the underwater segments of the paths are relatively short, variations in bathymetric characteristics from path to path influence the regional wave field, with systematic behavior that can be used to establish empirical amplitude corrections for regi

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31

Sambolian, S., A. Gorszczyk, S. Operto, A. Ribodetti, and B. Tavakoli F. "Mitigating the ill-posedness of first-arrival traveltime tomography using slopes: application to the eastern Nankai Trough (Japan) OBS data set." Geophysical Journal International 227, no. 2 (2021): 898–921. http://dx.doi.org/10.1093/gji/ggab262.

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SUMMARY First-arrival traveltime tomography is one of the most used velocity model building techniques especially in sparse wide-angle acquisitions for deep crustal seismic imaging cases. Relying on the inversion of a picked attribute, the absolute traveltimes, the approach is ill-posed in terms of non-uniqueness of the solution. The latter is remedied by proper regularization or the introduction of prior information. Indeed, since traveltime kernels are vulnerable to the velocity–depth ambiguity, the inversion is stabilized by the introduction of complementary data like reflections and explic

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32

Zhang, Bing. "Coherent Inverse Compton Scattering by Bunches in Fast Radio Bursts." Astrophysical Journal 925, no. 1 (2022): 53. http://dx.doi.org/10.3847/1538-4357/ac3979.

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Abstract The extremely high brightness temperature of fast radio bursts (FRBs) requires that their emission mechanism must be “coherent,” either through concerted particle emission by bunches or through the exponential growth of a plasma wave mode or radiation amplitude via certain maser mechanisms. The bunching mechanism has been mostly discussed within the context of curvature radiation or cyclotron/synchrotron radiation. Here we propose a family of models invoking the coherent inverse Compton scattering (ICS) of bunched particles that may operate within or just outside of the magnetosphere

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33

Qu, Yuanhong, and Bing Zhang. "Coherent Inverse Compton Scattering in Fast Radio Bursts Revisited." Astrophysical Journal 972, no. 1 (2024): 124. http://dx.doi.org/10.3847/1538-4357/ad5d5b.

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Abstract Growing observations of temporal, spectral, and polarization properties of fast radio bursts (FRBs) indicate that the radio emission of the majority of bursts is likely produced inside the magnetosphere of its central engine, likely a magnetar. We revisit the idea that FRBs are generated via coherent inverse Compton scattering (ICS) off low-frequency X-mode electromagnetic waves (fast magnetosonic waves) by bunches at a distance of a few hundred times the magnetar radius. The following findings are revealed: (1) Crustal oscillations during a flaring event would excite kHz Alfvén waves

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34

Frankel, Arthur, and Robert W. Clayton. "Finite difference simulations of seismic scattering: Implications for the propagation of short-period seismic waves in the crust and models of crustal heterogeneity." Journal of Geophysical Research 91, B6 (1986): 6465. http://dx.doi.org/10.1029/jb091ib06p06465.

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35

Konovalov, Alexey, Ilia Orlin, Andrey Stepnov, and Yulia Stepnova. "Physically Based and Empirical Ground Motion Prediction Equations for Multiple Intensity Measures (PGA, PGV, Ia, FIV3, CII, and Maximum Fourier Acceleration Spectra) on Sakhalin Island." Geosciences 13, no. 7 (2023): 201. http://dx.doi.org/10.3390/geosciences13070201.

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In the present study, empirical attenuation relations for multiple ground motion intensity measures (PGA, PGV, Ia, FIV3, CII, and MFAS) were developed for Sakhalin Island (in the far east of Russia). A recorded strong motion dataset was used, making GMPEs applicable in active crustal regions with an earthquake magnitude range of 4–6 and a distance range of up to 150 km. The hypocentral distance was used as a basic distance metric. For the first time in the research, an analytical representation of Arias intensity (Ia) was obtained in the framework of a multi-asperity source model. Asperities a

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36

Leng, K., J. Korenaga, and T. Nissen-Meyer. "3-D scattering of elastic waves by small-scale heterogeneities in the Earth’s mantle." Geophysical Journal International 223, no. 1 (2020): 502–25. http://dx.doi.org/10.1093/gji/ggaa331.

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SUMMARY Small-scale heterogeneities in the Earth’s mantle, the origin of which is likely compositional anomalies, can provide critical clues on the evolution of mantle convection. Seismological investigation of such small-scale heterogeneities can be facilitated by forward modelling of elastic wave scattering at high frequencies, but doing so with conventional 3-D numerical methods has been computationally prohibitive. We develop an efficient approach for computing high-frequency synthetic wavefields originating from small-scale mantle heterogeneities. Our approach delivers the exact elastodyn

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37

Cao, S., B. L. N. Kennett, and B. R. Goleby. "A 3D isochronal modelling technique and its applications." Exploration Geophysics 20, no. 2 (1989): 205. http://dx.doi.org/10.1071/eg989205.

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Reflection seismic datasets are obtained in both the exploration of oil and mineral resources and the probing of the deep crust and the upper mantle. To interpret the datasets, considerable effort has been spent on the understanding of seismic wave propagation phenomena by simulating seismic wave propagations in some a priori physical models. A rather simple and efficient modelling technique has been developed to study elastic wave reflections with full inclusion of diffractions.This modelling technique employs an integral representation of reflections from a surface or a scatterer. High frequ

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38

Kinczyk, Mallory J., Brett W. Denevi, Hiroyuki Sato, et al. "Photometry of Lunar Swirls in Comparison to Fresh Crater Ejecta." Planetary Science Journal 6, no. 3 (2025): 57. https://doi.org/10.3847/psj/adafa6.

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Abstract Swirls are sinuous high-reflectance lunar surface features collocated with crustal magnetic anomalies. These bright features and their geographical relationship to magnetic anomalies have been studied for decades, although their cause remains unclear. Several mechanisms for swirl formation have been proposed, including altered space weathering due to solar wind shielding, scouring of the surface by cometary impacts, and sorting of regolith materials. We use an empirical phase curve analysis and Hapke radiative transfer modeling of single-scattering albedo, bidirectional reflectance, a

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39

Leary, Peter, and Rachel Abercrombie. "Frequency dependent crustal scattering and absorption at 5-160 Hz from coda decay observed at 2.5 km Depth." Geophysical Research Letters 21, no. 11 (1994): 971–74. http://dx.doi.org/10.1029/94gl00977.

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40

Izgi, Gizem, Tuna Eken, Peter Gaebler, Tülay Kaya-Eken, and Tuncay Taymaz. "Frequency-dependent shear wave attenuation across the Central Anatolia region, Türkiye." Solid Earth 15, no. 6 (2024): 657–69. http://dx.doi.org/10.5194/se-15-657-2024.

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Abstract. The Central Anatolian Plateau with its volcanic provinces represents a broad transition zone between the compressional deformation in the east and the extensional regime in the west. The Central Anatolian Fault Zone separates the Kırşehir Block in the north and the Anatolide–Tauride Block in the south within the plateau. A proper understanding of physical properties such as seismic attenuation in the crustal volume of this region can provide hints toward the possible source for the geodynamic events in the past and present that likely lead to the observed deformation. In order to mod

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41

Rizzo, L. V., P. Artaxo, T. Müller, et al. "Long term measurements of aerosol optical properties at a primary forest site in Amazonia." Atmospheric Chemistry and Physics 13, no. 5 (2013): 2391–413. http://dx.doi.org/10.5194/acp-13-2391-2013.

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Abstract. A long term experiment was conducted in a primary forest area in Amazonia, with continuous in-situ measurements of aerosol optical properties between February 2008 and April 2011, comprising, to our knowledge, the longest database ever in the Amazon Basin. Two major classes of aerosol particles, with significantly different optical properties were identified: coarse mode predominant biogenic aerosols in the wet season (January–June), naturally released by the forest metabolism, and fine mode dominated biomass burning aerosols in the dry season (July–December), transported from region

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42

Brito, J., L. V. Rizzo, P. Herckes, et al. "Physical-chemical characterization of the particulate matter inside two road tunnels in the São Paulo Metropolitan Area." Atmospheric Chemistry and Physics Discussions 13, no. 8 (2013): 20839–83. http://dx.doi.org/10.5194/acpd-13-20839-2013.

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Abstract. The notable increase in biofuel usage by the road transportation sector in Brazil during recent years has significantly altered the vehicular fuel composition. Consequently, many uncertainties are currently found in particulate matter vehicular emission profiles. In an effort to better characterize the emitted particulate matter, measurements of aerosol physical and chemical properties were undertaken inside two tunnels located in the São Paulo Metropolitan Area (SPMA). The tunnels show very distinct fleet profiles: in the Jânio Quadros (JQ) tunnel, the vast majority of the circulati

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43

Brito, J., L. V. Rizzo, P. Herckes, et al. "Physical–chemical characterisation of the particulate matter inside two road tunnels in the São Paulo Metropolitan Area." Atmospheric Chemistry and Physics 13, no. 24 (2013): 12199–213. http://dx.doi.org/10.5194/acp-13-12199-2013.

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Abstract. The notable increase in biofuel usage by the road transportation sector in Brazil during recent years has significantly altered the vehicular fuel composition. Consequently, many uncertainties are currently found in particulate matter vehicular emission profiles. In an effort to better characterise the emitted particulate matter, measurements of aerosol physical and chemical properties were undertaken inside two tunnels located in the São Paulo Metropolitan Area (SPMA). The tunnels show very distinct fleet profiles: in the Jânio Quadros (JQ) tunnel, the vast majority of the circulati

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44

Xu, Song, Xiaoming Tang, Yuanda Su, and Chunxi Zhuang. "Seismic shear wave anisotropy of an anisotropic rock containing aligned cracks: theory and applications to experiment and field data." Geophysical Journal International 220, no. 1 (2019): 404–14. http://dx.doi.org/10.1093/gji/ggz456.

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SUMMARY Cracks universally exist in Earth's crustal rocks. Many rocks are intrinsically anisotropic, which, when coupled with crack-induced anisotropy, significantly affect seismic wave propagation through the rocks. Using the method of sphere equivalency of effective scattering, we have developed a technique to model the effective moduli of transversely isotropic (TI) media containing cracks. The modelling results show that the wave characteristics are significantly affected by the interaction of the two anisotropy mechanisms. To validate the validity and accuracy, the theory was applied to a

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45

Hartse, Hans E., W. Scott Phillips, Michael C. Fehler, and Leigh S. House. "Single-station spectral discrimination using coda waves." Bulletin of the Seismological Society of America 85, no. 5 (1995): 1464–74. http://dx.doi.org/10.1785/bssa0850051464.

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Abstract Spectral discrimination methods applied at regional distances are based on the observation that there is a difference in the frequency content of the seismic waves radiated from the source region of earthquakes and explosions. We have investigated a spectral discrimination method that exploits the scattered energy contained in the event codas of seismograms to measure the relative source excitation of earthquakes and explosions as a function of frequency. Key strengths of the coda method include the following: (1) it is not affected by source radiation pattern because the scattering p

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46

Rizzo, L. V., P. Artaxo, T. Müller, et al. "Long term measurements of aerosol optical properties at a pristine forest site in Amazonia." Atmospheric Chemistry and Physics Discussions 12, no. 9 (2012): 23333–401. http://dx.doi.org/10.5194/acpd-12-23333-2012.

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Abstract. A long term experiment was conducted in a pristine area in the Amazon forest, with continuous in situ measurements of aerosol optical properties between February 2008 and April 2011, comprising, to our knowledge, the longest database ever in Amazonia. Two types of aerosol particles, with significantly different optical properties were identified: coarse mode predominant biogenic aerosols in the wet season (January–June), naturally released by the forest metabolism, and fine mode dominated biomass burning aerosols in the dry season (July–December), transported from regional fires. Dry

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47

Finlay, Tori S., Lindsay L. Worthington, Brandon Schmandt, Nishath R. Ranasinghe, Susan L. Bilek, and Richard C. Aster. "Teleseismic Scattered‐Wave Imaging Using a Large‐N Array in the Albuquerque Basin, New Mexico." Seismological Research Letters 91, no. 1 (2019): 287–303. http://dx.doi.org/10.1785/0220190146.

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Abstract The advent of low‐cost continuously recording cable‐free autonomous seismographs, commonly referred to as nodes, enables dense spatiotemporal sampling of seismic wavefields. We create virtual source reflection profiles using P waves from five teleseismic events recorded by the Sevilleta node array experiment in the southern Albuquerque basin. The basin geology records a structurally complex history, including multiple Phanerozoic orogenies, Rio Grande rift extension, and ongoing uplift from a midcrustal magma body. The Sevilleta experiment densified the long term, regionally sparse se

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Shillington, Donna J., John R. Hopper, and W. Steven Holbrook. "Seismic signal penetration beneath postrift sills on the Newfoundland rifted margin." GEOPHYSICS 73, no. 5 (2008): B99—B107. http://dx.doi.org/10.1190/1.2972131.

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Analysis of averaged, smoothed instantaneous frequency and amplitude of seismic-reflection data collected on the Newfoundland magma-starved rifted margin along the Ocean Drilling Program (ODP) leg 210 transect demonstrate that the transparency of “transitional” crust arises from poor signal penetration. In principle, the high-frequency spectral content and amplitude of seismic reflection data should decrease with increasing traveltime as a result of absorption, geometric spreading, and scattering so long as seismic energy continues to return from deeper levels of the subsurface. As a result, i

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ANDREI, BĂLĂ, RADULIAN MIRCEA, and TOMA-DĂNILĂ DRAGOȘ. "CRUSTAL STRESS FIELD IN THE ACTIVE SEISMIC ZONES IN AND AROUND VRANCEA AREA, ROMANIA." REVUE ROUMAINE DE GEOPHYSIQUE / ROMANIAN GEOPHYSICAL JOURNAL 63 - 64 / 2019 - 2020 (February 18, 2021): 80. https://doi.org/10.5281/zenodo.4548646.

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The mechanisms involved in the geodynamic evolution and the links with present day seismicity in and around an active orogenic area such as Vrancea area, located at the arc bend of the South-Eastern Carpathians in Romania, are of fundamental importance for studies concerning the seismic hazard assessment in Romania. The task is attempted through the partitioning of seismic events and corresponding stress at crustal level in and around the Vrancea zone. We start in this respect with the configuration of seismogenic zones as defined in previous investigations and then we use all the available an

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Filippucci, Marilena, Salvatore Lucente, Edoardo Del Pezzo, Salvatore de Lorenzo, Giacomo Prosser, and Andrea Tallarico. "3D-Kernel Based Imaging of an Improved Estimation of (Qc) in the Northern Apulia (Southern Italy)." Applied Sciences 11, no. 16 (2021): 7512. http://dx.doi.org/10.3390/app11167512.

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We investigate crustal seismic attenuation by the coda quality parameter (Qc) in the Gargano area (Southern Italy), using a recently released dataset composed of 191 small earthquakes (1.0 ≤ ML ≤ 2.8) recorded by the local OTRIONS and the Italian INGV seismic networks, over three years of seismic monitoring. Following the single back-scattering theoretical assumption, Qc was computed using different frequencies (in the range of 2–16 Hz) and different lapse times (from 10 to 40 s). The trend of Qc vs. frequency is the same as that observed in the adjacent Umbria-Marche region. Qc at 1 Hz varies

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