| Abstract: | A two-step finite-fault waveform inversion scheme is applied to the broadband teleseismic P waves recorded for the strike-slip, Cariaco, Venezuela, earthquake of 9 July 1997 to recover the distribution of mainshock slip. The earthquake is first analyzed using a long narrow fault with a maximum rise time of 20 sec. This line-source analysis indicates that slip propagated to the west with a constant rupture velocity and a relatively short rise time. The results are then used to constrain a second inversion of the P waveforms using a 60-km by 20-km two-dimensional fault. The rupture shows a zone of large slip (1.3-m peak) near the hypocenter and a second, broader source extending updip and to the west at depths shallower than 5 km. The second source has a peak slip of 2.1 meters and accounts for most of the moment of 1.1 ?? 1026 dyne-cm (6.6 MW) estimated from the P waves. The inferred rupture pattern is consistent with macroseismic effects observed in the epicentral area. |
| Genre: | Article |
| ProdID: | 70022276 |
| Citation Author: | Mendoza, C. |
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| Citation End Page: | 1558 |
| Citation Issue: | 10 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysical Research Letters |
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| Citation Number Of Pages: | 4 |
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| Citation Search Results Text: | Rupture history of the 1997 Cariaco, Venezuela, earthquake from teleseismic P waves; 2000; Article; Journal; Geophysical Research Letters; Mendoza, C. |
| Citation Start Page: | 1555 |
| Citation Volume: | 27 |
| Citation Year: | 2000 |
| Type: | citation/reference |
| Text: | Rupture history of the 1997 Cariaco, Venezuela, earthquake from teleseismic P waves; 2000; Article; Journal; Geophysical Research Letters; Mendoza, C. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Sat, 1 Jan 2000 00:00 -0600 |
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