|
| | Abstract | | The 2016 Kumamoto earthquake occurred successively on April 14 (Mj6.5), and April 16 (Mj7.3), 2016, in Kumamoto region, Japan. The region suffered devastating damages from strong ground shakings with a seismic intensity of 7 at most. We implemented aftershock observation, aiming at detecting localized zone on a fault plane where short-period strong motions are radiated. We started installing 6 seismometers around the region from April 22 to April 29, and added 11 seismometers on May 5 to June 27. We deployed 17 temporary seismic stations in total. As an initial step for this aim, we analyzed recordings of these aftershocks, and determined the spatial distribution of the hypocenter location, the focal mechanism, and the direction of tension axis. It results in that the focal depth range is between 2km and 18km, primary fault types are the strike-slip and the normal-slip faults, and the tension axis is extended north-northwest to south-southeast. |
|
|
|
| |
|