Results 281 to 290 of about 2,622 (303)
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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 the Koyna earthquakes with a new velocity model
Bulletin of the Seismological Society of America, 1986abstractHypocenter 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
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Machine learning enhanced earthquake relocation
Seismic activity provides critical insights into subsurface processes such as tectonic movements, volcanic activity, and fluid migrations, with accurate earthquake locations being essential for enhancing our understanding of these seismic behaviors. However, seismic array geometry significantly influences earthquake location accuracy. Over the past twoFarzaneh Mohammadi +3 more
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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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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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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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Relocation of Early Instrumental Earthquakes in the Arctic
Seismic Instruments, 2022A. N. Morozov +3 more
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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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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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