THE SCATTER OF TIME-DELAYS IN SHEAR-WAVE SPLITTING ABOVE SMALL EARTHQUAKES
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dc.contributor.author | Crampin S. | |
dc.contributor.author | Peacock Sh. | |
dc.contributor.author | Gao Yu. | |
dc.contributor.author | Chastin S. | |
dc.date.accessioned | 2022-09-21T01:18:30Z | |
dc.date.available | 2022-09-21T01:18:30Z | |
dc.date.issued | 2004 | |
dc.identifier | https://elibrary.ru/item.asp?id=5203198 | |
dc.identifier.citation | Geophysical Journal International, 2004, 156, 1, 39-44 | |
dc.identifier.issn | 0956-540X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/38653 | |
dc.description.abstract | Measurements of time-delays in seismic shear-wave splitting above small earthquakes typically display a scatter of often as much as ±80 per cent about the mean. Changes in the average time-delay appear to be related to changes of stress, but applications of this potentially powerful tool have been handicapped by the previously inexplicable scatter in time-delays above earthquakes. In contrast, measurements of shear-wave time-delays in controlled-source exploration seismics are typically well controlled and display little scatter. Previous estimates of possible causes of scatter cannot produce sufficient variation specifically above earthquakes. Here we show that 90°-flips in shear-wave polarizations due to fluctuating high pore-fluid pressures on seismically-active fault planes are the most likely cause of the scatter. | |
dc.subject | CRACK-CRITICAL SYSTEMS | |
dc.subject | CRITICALLY-HIGH PORE-FLUID PRESSURES | |
dc.subject | SCATTER IN TIME-DELAYS | |
dc.subject | SHEAR-WAVE SPLITTING | |
dc.subject | 90°-FLIPS | |
dc.title | THE SCATTER OF TIME-DELAYS IN SHEAR-WAVE SPLITTING ABOVE SMALL EARTHQUAKES | |
dc.type | Статья |
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