Physics
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005georl..3210307m&link_type=abstract
Geophysical Research Letters, Volume 32, Issue 10, CiteID L10307
Physics
27
Seismology: Earthquake Dynamics (1242), Seismology: Earthquake Source Observations (1240), Seismology: Earthquake Interaction, Forecasting, And Prediction (1217, 1242), Seismology: Seismicity And Tectonics (1207, 1217, 1240, 1242), Seismology: Surface Waves And Free Oscillations
Scientific paper
We show the level of increased/decreased seismicity mapped across Japan immediately following the 2003 Tokachi-oki earthquake (Mw 8.1) of September 25, 2003 (UT) by use of the β-statistic. Significant dynamic triggering of events is found near the Nankai subduction zone 900-1400 km from the earthquake. The events are inferred to be dynamically triggered deep low-frequency earthquakes, of a type that often occur in this region. The triggering appears to be caused by the long-period oscillations of the surface waves, which may be effective in triggering fluid-related events. The region that showed the highest level of triggered events, was an area of elevated activity in the Bungo strait where a slow-slip event was in progress.
Miyazawa Masatoshi
Mori Jim J.
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