Precise hypocenter locations of midcrustal low-frequency earthquakes beneath Mt. Fuji, Japan
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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.
Study Area
Publication type | Article |
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Publication Subtype | Journal Article |
Title | Precise hypocenter locations of midcrustal low-frequency earthquakes beneath Mt. Fuji, Japan |
Series title | Earth, Planets and Space |
DOI | 10.1186/BF03352542 |
Volume | 56 |
Issue | 12 |
Year Published | 2004 |
Language | English |
Publisher | Springer |
Description | 4 p. |
First page | e37 |
Last page | e40 |
Country | Japan |
Other Geospatial | Mt. Fuji |
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