We will be performing a system maintenance on Wednesday, October 21, from 3:00 PM to 4:00 PM.As a re...

On Monday, October 26, during 3:10 PM and 5:10 PM, the restart of the IISEE web server is scheduled....

Due to scheduled electrical equipment maintenance, this site will be temporarily unavailable from 7:...

Special page of Flores Earthquake of August 14, 2026 is posted....

Special page of Kumamoto Earthquake of July 28, 2026 is posted....

Special page of Eastern Region・Fuji Five Lakes, Yamanashi Prefecture Earthquake of June 26, 2026 is ...