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Partitioning between seismogenic and aseismic slip as highlighted from slow slip events in Hyuga‐nada, Japan
Author(s) -
Yagi Yuji,
Kikuchi Masayuki
Publication year - 2003
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl015664
Subject(s) - seismology , geology , slip (aerodynamics) , episodic tremor and slip , subduction , slow earthquake , pacific plate , global positioning system , seismic gap , induced seismicity , interplate earthquake , tectonics , telecommunications , physics , computer science , thermodynamics
We present a numerical method to analyze the GPS data, and examine slow fault‐slips in Hyuga‐nada, a region in western Japan where the Philippine Sea plate subducts under the Eurasian plate and earthquakes of Magnitude 7 class are frequent. We found that, after two large earthquakes in 1996, a slow fault‐slip expanded from the source area to the north and then triggered another slow event with a characteristic source duration of about one year. The aseismic slip has increasingly highlighted a particular site where little slow fault‐slip takes place but where the subducting plate drags the overriding plate. It is noteworthy that the highlighted area is just the site of a past large earthquake. We propose that this area is a possible site for a future large earthquake.