EVIDENCE FOR A GLOBAL SEISMIC-MOMENT RELEASE SEQUENCE
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dc.contributor.author | Bufe C.G. | |
dc.contributor.author | Perkins D.M. | |
dc.date.accessioned | 2023-12-23T04:12:16Z | |
dc.date.available | 2023-12-23T04:12:16Z | |
dc.date.issued | 2005 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=31270715 | |
dc.identifier.citation | Bulletin of the Seismological Society of America, 2005, 95, 3, 833-843 | |
dc.identifier.issn | 0037-1106 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/42373 | |
dc.description.abstract | Temporal clustering of the larger earthquakes (foreshock-mainshock-aftershock) followed by relative quiescence (stress shadow) are characteristic of seismic cycles along plate boundaries. A global seismic-moment release history, based on a little more than 100 years of instrumental earthquake data in an extended version of the catalog of Pacheco and Sykes (1992), illustrates similar behavior for Earth as a whole. Although the largest earthquakes have occurred in the circum-Pacific region, an analysis of moment release in the hemisphere antipodal to the Pacific plate shows a very similar pattern. Monte Carlo simulations confirm that the global temporal clustering of great shallow earthquakes during 1952-1964 at M ≥ 9.0 is highly significant (4% random probability) as is the clustering of the events of M ≥ 8.6 (0.2% random probability) during 1950-1965. We have extended the Pacheco and Sykes (1992) catalog from 1989 through 2001 using Harvard moment centroid data. Immediately after the 1950-1965 cluster, significant quiescence at and above M 8.4 begins and continues until 2001 (0.5% random probability). In alternative catalogs derived by correcting for possible random errors in magnitude estimates in the extended Pacheco-Sykes catalog, the clustering of M ≥ 9 persists at a significant level. These observations indicate that, for great earthquakes, Earth behaves as a coherent seismotectonic system. A very-large-scale mechanism for global earthquake triggering and/or stress transfer is implied. There are several candidates, but so far only viscoelastic relaxation has been modeled on a global scale. | |
dc.subject | earthquakes | |
dc.title | EVIDENCE FOR A GLOBAL SEISMIC-MOMENT RELEASE SEQUENCE | |
dc.type | Статья | |
dc.identifier.doi | 10.1785/0120040110 |
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