NDC-Type Tectonic Earthquakes in the Subduction Zones within Northwestern Segment of the Pacific Ring of Fire

Marshakova, E.; Smirnov, V.; Mikhailov, V.

Авторы: Marshakova EA, Smirnov VB, Mikhailov VO
Журнал: Izvestiya. Physics of the Solid Earth
Том: 61
Номер: 6
Год издания: 2025
Издательство: Pleiades Publishing, Inc.
Местоположение издательства: New York, USA
Первая страница: 913
Последняя страница: 924
Оригинальные версии: ТЕКТОНИЧЕСКИЕ ЗЕМЛЕТРЯСЕНИЯ NDC-ТИПА В ЗОНАХ СУБДУКЦИИ СЕВЕРО-ЗАПАДНОЙ ЧАСТИ ТИХООКЕАНСКОГО СЕЙСМИЧЕСКОГО КОЛЬЦА
DOI: 10.1134/S1069351325700843
Аннотация: A systematic analysis of seismic moment tensors is conducted for earthquakes in the subductionzones of the Aleutian, Kuril-Kamchatka, and Japan island arcs. Earthquakes whose sources are not fit by thedouble-couple model (non-double-couple (NDC-type) earthquakes) are identified by estimating the anglebetween the slip vector and the rupture plane in the source based on seismic moment tensor eigenvalues. Byanalyzing error distribution of moment tensor component estimates, we revealed earthquakes with a significantNDC component in their source. Some features of the distribution of such earthquakes in the studiedregion are discussed. We compared the results of identifying sources containing a significant NDC componentbased on data from various seismological agencies. The comparison has shown that the catalogs of theU.S. Geological Survey (NEIC) and the Japan National Research Institute for Earth Science and DisasterResilience (NIED) slightly underestimate the magnitude of the angle between the slip vector and the ruptureplane compared to the Global Centroid Moment Catalog (GCMT). The applied method and the obtainedestimates of NDC source slip component can be used in the numerical modeling of slip motion in the sourcesof strong earthquakes based on the combination of ground-based and satellite strain data.
Добавил в систему: Смирнов Владимир Борисович

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NDC-Type Tectonic Earthquakes in the Subduction Zones within Northwestern Segment of the Pacific Ring of Fireстатья

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