| Abstract: | The 51 global events that occurred from January 1980 to March 1984, which were chosen by the convenors of the Symposium on Seismological Theory and Practice, have been analyzed using a moment tensor inversion algorithm (Sipkin). Many of the events were routinely analyzed as part of the National Earthquake Information Center‘s (NEIC) efforts to publish moment tensor and first-motion fault-plane solutions for all moderate- to large-sized (mb>5.7) earthquakes. In routine use only long-period P-waves are used and the source-time function is constrained to be a step-function at the source (??-function in the far-field). Four of the events were of special interest, and long-period P, SH-wave solutions were obtained. For three of these events, an unconstrained inversion was performed. The resulting time-dependent solutions indicated that, for many cases, departures of the solutions from pure double-couples are caused by source complexity that has not been adequately modeled. These solutions also indicate that source complexity of moderate-sized events can be determined from long-period data. Finally, for one of the events of special interest, an inversion of the broadband P-waveforms was also performed, demonstrating the potential for using broadband waveform data in inversion procedures. ?? 1987. |
| Genre: | Article |
| ProdID: | 70014167 |
| Citation Author: | Sipkin, S. A. |
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| Citation End Page: | 79 |
| Citation Issue: | C |
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| Citation Language: | English |
| Citation Larger Work Title: | Physics of the Earth and Planetary Interiors |
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| Citation Number Of Pages: | 13 |
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| Citation Publisher: | Elsevier |
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| Citation Search Results Text: | Moment tensor solutions estimated using optimal filter theory for 51 selected earthquakes, 1980-1984; 1987; Article; Journal; Physics of the Earth and Planetary Interiors; Sipkin, S. A. |
| Citation Start Page: | 67 |
| Citation Volume: | 47 |
| Citation Year: | 1987 |
| Type: | citation/reference |
| Text: | Moment tensor solutions estimated using optimal filter theory for 51 selected earthquakes, 1980-1984; 1987; Article; Journal; Physics of the Earth and Planetary Interiors; Sipkin, S. A. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0031-9201(87)90068-9 |
| Date Other: | Thu, 1 Jan 1987 00:00 -0600 |
| Publisher: | Elsevier |
