| Abstract: | Midcrustal low-frequency earthquakes (MLFs) have been observed at seismic stations around Mt. Fuji, Japan. In September - December 2000 and April - May 2001, abnormally high numbers of MLFs occurred. We located hypocenters for the 80 MLFs during 1998-2003 by using the hypoDD earthquake location program (Waldhauser and Ellsworth, 2000). The MLF hypocenters define an ellipsoidal volume some 5 km in diameter ranging from 11 to 16 km in focal depth. This volume is centered 3 km northeast of the summit and its long axis is directed NW-SE. The direction of the axis coincides with the major axis of tectonic compression around Mt. Fuji. The center of the MLF epicenters gradually migrated upward and 2-3 km from southeast to northwest during 1998-2001. We interpret that the hypocentral migration of MLFs reflects magma movement associated with a NW-SE oriented dike beneath Mt. Fuji. Copyright ?? The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. |
| Genre: | Article |
| ProdID: | 70026478 |
| Citation Author: | Nakamichi, H.; Ukawa, M.; Sakai, S. |
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| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Earth, Planets and Space |
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| Citation Search Results Text: | Precise hypocenter locations of midcrustal low-frequency earthquakes beneath Mt. Fuji, Japan; 2004; Article; Journal; Earth, Planets and Space; Nakamichi, H.; Ukawa, M.; Sakai, S. |
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| Citation Volume: | 56 |
| Citation Year: | 2004 |
| Type: | citation/reference |
| Text: | Precise hypocenter locations of midcrustal low-frequency earthquakes beneath Mt. Fuji, Japan; 2004; Article; Journal; Earth, Planets and Space; Nakamichi, H.; Ukawa, M.; Sakai, S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Thu, 1 Jan 2004 00:00 -0600 |
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