[SSS13-P02] Spatial and temporal change in b values on the fault plane of the 2016 Kumamoto earthquakes.
Keywords:2016 Kumamoto earthquakes, b value, visualization
Since b values are known to be inversely dependent on differential stress (Scholz, 1968, 2015), the observed low b values in the epicenter area was interpreted as an indication of highly stressed area.
This study visualized the spatial and temporal change in b values on the fault plane of the 2016 Kumamoto earthquakes. The result showed that zones of low b value near the epicenter of two events (M6.5 quake on April 14 and M7.3 quake on April 16) overlapped with the slip distribution estimated by the analysis of near-field data of strong ground motions.
This is consistent with the result of Nanjo et al.(2012) on the case of the Tohoku Earthquake on March 11, 2011.
This study visualized the spatial and temporal change in b values on the fault plane of the 2016 Kumamoto earthquakes. The result showed that zones of low b value near the epicenter of two events (M6.5 quake on April 14 and M7.3 quake on April 16) overlapped with the slip distribution estimated by the analysis of near-field data of strong ground motions.
This is consistent with the result of Nanjo et al.(2012) on the case of the Tohoku Earthquake on March 11, 2011.