scholarly journals Temporal variation characteristics of shear-wave splitting for the Rushan earthquake swarm of Shandong Province

2017 ◽  
Author(s):  
Qingjie Miao ◽  
Xiqiang Liu
Keyword(s):  
Temporal Variation ◽  
Shear Wave ◽  
Earthquake Swarm ◽  
Shear Wave Splitting ◽  
Shandong Province ◽  
Wave Splitting ◽  
Variation Characteristics

Crustal anisotropy from local observations of shear-wave splitting in West Bohemia, Czech Republic

1993 ◽  
Vol 83 (5) ◽  
pp. 1420-1441 ◽  
Author(s):  
Václav Vavryčuk
Keyword(s):  
Shear Wave ◽  
Delay Time ◽  
Epicentral Distance ◽  
Earthquake Swarm ◽  
Tectonic Stress ◽  
Shear Wave Splitting ◽  
Horizontal Projection ◽  
Crustal Anisotropy ◽  
Maximum Delay ◽  
Wave Splitting

Abstract The results of a systematic study of shear-wave splitting, observed in the three-component digital seismograms of about 400 local microearthquakes that occurred during the 1985/1986 West-Bohemian earthquake swarm are presented. Two shear phases, polarized nearly perpendicularly in horizontal projection, were observed at all five stations of the local seismic network for most of the events. The polarization of the faster shear wave is aligned in the WNW-ESE direction, regardless of the mechanism and hypocenter location of the individual events, and coincides with the direction of the maximum horizontal compressive tectonic stress in the region. These effects are interpreted in terms of effective anisotropy of the upper crust in the region. The maximum delay time between the split shear waves is 0.15 sec and corresponds to 6% anisotropy. Directional variation of the delay time was observed at the nearest station (epicentral distance ≈ 5 km). This variation was compared with functions predicted by theoretical models of cracked media to resolve which model is the most appropriate for crustal anisotropy. Surprisingly, no agreement could be found for Hudson's model of dry or water-filled parallel cracks that is widely used by many authors. A successful fit was obtained for Schoenberg — Douma's model of a medium with parallel fractures. The fracture normal pointed N31°E, and the optimum fracture parameters were EN = 0.4 and ET = 0.02. The theoretically calculated fractures are aligned parallel to the tectonic stress direction and do not correspond to any real tectonic lines in the region.

scholarly journals Temporal variation of shear-wave splitting parameters before and after the 2008 Movri Mountain earthquake in northwest Peloponnese (Greece)

2013 ◽  
Vol 55 (5) ◽  
Author(s):  
Dimitrios Giannopoulos ◽  
Efthimios Sokos ◽  
Konstantinos I. ◽  
Athanasios Lois ◽  
G-Akis Tselentis
Keyword(s):  
Temporal Variation ◽  
Shear Wave ◽  
Shear Wave Splitting ◽  
Wave Splitting ◽  
Before And After

Temporal changes in shear wave splitting during an earthquake swarm in Arkansas

1990 ◽  
Vol 95 (B7) ◽  
pp. 11151 ◽  
Author(s):  
David C. Booth ◽  
Stuart Crampin ◽  
John H. Lovell ◽  
Jer-Ming Chiu
Keyword(s):  
Shear Wave ◽  
Earthquake Swarm ◽  
Shear Wave Splitting ◽  
Temporal Changes ◽  
Wave Splitting

Analysis of shear wave splitting anisotropy in the Tres Virgenes Volcanic Complex, Baja California Sur, Mexico

Geothermics ◽  
2021 ◽  
Vol 94 ◽  
pp. 102115
Author(s):  
F. Chacón-Hernández ◽  
F.R. Zúñiga ◽  
J.O. Campos-Enríquez ◽  
J. Lermo-Samaniego ◽  
N. Jiménez-Méndez
Keyword(s):  
Shear Wave ◽  
Baja California ◽  
Shear Wave Splitting ◽  
Volcanic Complex ◽  
Baja California Sur ◽  
Wave Splitting

Effects of oil‐water saturation on shear‐wave splitting in multicomponent seismic data

2007 ◽  
Author(s):  
Zhongping Qian ◽  
Xiang‐Yang Li ◽  
Mark Chapman ◽  
Yonggang Zhang ◽  
Yanguang Wang
Keyword(s):  
Shear Wave ◽  
Seismic Data ◽  
Water Saturation ◽  
Shear Wave Splitting ◽  
Multicomponent Seismic ◽  
Wave Splitting ◽  
Oil Water
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