Results 281 to 290 of about 310,222 (307)
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Relocation of local earthquakes by seismic ray tracing
Journal of Geophysical Research, 1976Seismic ray tracing is used to relocate a set of local earthquakes recorded by a dense seismic array in Bear Valley, California. The crustal velocity structure is two-dimensional and incorporates most of the known and inferred velocity differences in the region.
E. R. Engdahl, W. H. K. Lee
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Acta Seismologica Sinica, 2000
The northeastern region of Qinghai-Xizang plateau is the junction part of the Qinghai-Xizang block, Alxa block and Ordos block. To explore tectonic feature of this region 4 study profiles are selected by taking geological background into consideration.
Su-yun Wang +4 more
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The northeastern region of Qinghai-Xizang plateau is the junction part of the Qinghai-Xizang block, Alxa block and Ordos block. To explore tectonic feature of this region 4 study profiles are selected by taking geological background into consideration.
Su-yun Wang +4 more
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Relocation of Early Instrumental Earthquakes in the Arctic
Seismic Instruments, 2022A. N. Morozov +3 more
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On the Mathematics of Using Difference Operators to Relocate Earthquakes
Bulletin of the Seismological Society of America, 2002This article examines the properties of difference operators that are used to relocate earthquakes and remove path anomaly biases. There are presently three established algorithms based on such techniques: (1) the method of Jordan and Sverdrup (1981), (2) the double-difference method of Got et al.
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Evaluation of the instrumental and relocated epicentres of Iranian earthquakes
Geophysical Journal International, 1979Summary. Comparison of the instrumentally located and relocated epicentres (ISS, BCIS, USGS, Nabavi (IGS), Nowroozi, etc.) of Iranian earthquakes with the macroseismic epicentres of the largest magnitude and best studied earth- quakes, reveals deficiencies in the deteimination of the earthquake epicentres.
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Relocation of Earthquakes by Source‐Specific Station Corrections in Iran
Bulletin of the Seismological Society of America, 2015Abstract Accurate earthquake locations are crucial for investigating seismogenic processes, as well as for applications like verifying compliance to the Comprehensive Nuclear‐Test‐Ban Treaty. Modeling errors of calculated travel times, in addition to the density of the stations, their epicentral distances, and their azimuthal coverage, may have the ...
V. Materni +4 more
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High precision relocation of earthquakes at Iliamna Volcano, Alaska
Journal of Volcanology and Geothermal Research, 2009Abstract In August 1996, a period of elevated seismicity commenced beneath Iliamna Volcano, Alaska. This activity lasted until early 1997, consisted of over 3000 earthquakes, and was accompanied by elevated emissions of volcanic gases. No eruption occurred and seismicity returned to background levels where it has remained since.
Patrick Statz-Boyer +3 more
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Relocated Earthquakes Confined to the Upper Crust in the Southern Tibet
We have located a total of 202 local earthquakes, based on the data recorded by the Hi-CLIMB seismic stations from 2002-2005, in the southern Tibet. The focal depths of all relocated earthquakes, in the Lhasa terrane, are shallow than 30km, however, the depths can extend to 50km under Himalaya, although there are many earthquakes deeper than 80 km ...Gaochun Wang +2 more
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Relocations of Earthquakes (1899–1917) in South-Central Alaska
Pure and Applied Geophysics, 2006I have relocated 18 earthquakes occurring in the south-central Alaska region between 1899 and 1917 using a bootstrap relocation technique. Locations of events within the Yakutat region suggest that the 1899 sequence began on 4 September with a MS = 7.9 event within the area of the Pamplona fault zone/western Transition fault zone, rupturing the western
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