Earthquake under the Ocean Area near Iwotou Island on January 6
On January 6, 2016 at 06:59 (JST), there was a M6.0 earthquake (maximum seismic intensity 1) at a depth of 185 km under the ocean area near Iwotou Island. This event occurred within the Pacific plate. The focal mechanism of this event had a tension axis in an E-W direction.
For the seismic activity since January 2000, in the area around the recent event (Area b), there were 2 earthquakes of M7.0 or over: on March 28, 2000 (M7.9, maximum seismic intensity 3) and on September 28, 2007 (M7.6, maximum seismic intensity 2).
For the seismic activity since January 1923, in the area around the recent event, there have sometimes been earthquakes of M7.0 or over.
Japan Meteorological Agency
[Evaluation of Seismic Activities for January 2016 (February 9, 2016)]