| Abstract: | Following the episodes of inflation of the resurgent dome associated with the May 1980 earthquake sequence (four M 6 earthquakes) and the January 1983 earthquake swarm (two M 5.2 events), 7 years of frequently repeated two-color geodimeter measurements spanning the Long Valley caldera document gradually decreasing extensional strain rates from 5 ppm/yr in mid-1983, when the measurements began, to near zero in mid-1989. Early October 1989 marked a change in activity when measurements of the two-color geodimeter network showed a significant increase in extensional strain rate (9 ppm/yr) across the caldera. The seismic activity began exceeding 10 M ??? 1..2 per week in early December 1989 and rapidly increased to a sustained level of tens of M ??? 1.2 per week with bursts having hundreds of events per day. The episode of inflation can be modeled by a single Mogi point source located about 7 km beneath the center of the resurgent dome. -from Authors |
| Genre: | Article |
| ProdID: | 70017949 |
| Citation Author: | Langbein, J.; Hill, D. P.; Parker, T. N.; Wilkinson, S. K. |
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| Citation Issue: | B9 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Search Results Text: | An episode of reinflation of the Long Valley Caldera, eastern California: 1989-1991; 1993; Article; Journal; Journal of Geophysical Research; Langbein, J.; Hill, D. P.; Parker, T. N.; Wilkinson, S. K. |
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| Citation Volume: | 98 |
| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | An episode of reinflation of the Long Valley Caldera, eastern California: 1989-1991; 1993; Article; Journal; Journal of Geophysical Research; Langbein, J.; Hill, D. P.; Parker, T. N.; Wilkinson, S. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
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