Preliminary Results of the March 11, 2011 M9.0 Earthquake in Japan on Geospatial Information Authority Website

Dear colleagues,

I would like to inform you that preliminary results of the crustal deformation associated with the M9.0 earthquake in Japan on March 11, 2011 and the fault models obtained by the routine solutions of GEONET has been uploaded to the English web page of Geospatial Information Authority of Japan (GSI):

Click the items in the "New topics" for detail. I note that the temporal resolution of the three types of the routine solutions are 6 hours for the quick solutions (Solution ID: Q3), and 24 hours for the rapid (R3) and final (F3) solutions. A certain amount of post-seismic deformation is therefore not separated from the "co-seismic" displacement and models.

According to the Geodetic Observation Center of GSI, at least 3 GEONET stations were damaged by the tsunami and terminated observations. As of March 17, we cannot retrieve data from 25 stations around the epicenter due to the failures of power or communication line. IGS stations operated by GSI are safe, but coordinates of TSKB are affected by the crustal deformation from the earthquake.


Yuki Hatanaka, Ph.D,
Geospatial Information Authority of Japan (GSI) e-mail :