16th September, 2015 at 7:54PM(Chile time), a magnitude 8.3 Earthquake struck Chile. (cited from USGS)
Tsunami caused by this earthquake might be reaching Japan.
(Earthquake and Volcano Information Center: Aditya Gusman/Kenji Satake)
Earthquake source model
We estimated a single fault model based on W phase solution. The strike, dip, and rake angles are from the focal mechanism. The fault length, width and slip amount are estimated from the W phase seismic moment.
The plots of observed vs simulated tsunami waveforms at TM1 and TM2
(Center for Geophysical Observation and Instrumentation: Shinichi Sakai)
Change in sea level observed by the Ocean Bottom Seismograph System set off the coast of Kamaishi
The hydraulic gauge of TM1( located on the trench side) is set approx. 76km from land and at 1600m depth. TM2 (located on the land side) is set approx. 47km from land and is at 1000m below sea surface.
(Earthquake and Volcano Information Center: Kenji Satake)
Predicted waveforms at TM1 and TM2
Horizontal axis indicate for the time (hours) since earthquake occurence (at 7:54 AM this morning-Japan time)
A few cm (about 1cm for the first wave）height tsunami is expected to reach Japan from 5:30AM tomorrow morning.