A massive earthquake of magnitude of 9.0 occurred Friday 11 March, off the Pacific coast of the northeastern part of the Japanese main land (Tohoku Region), causing devastating damages. The Japan Meteorological Agency named this earthquake "The 2011 off the Pacific coast of Tohoku Earthquake."
Possibility: (maximum JMA Seismic Intensity 5+ or higher)
(period: 12:00JST, 25 March ~ 12:00JST, 28 March)
(period: 12:00JST, 28 March ~ 12:00JST, 31 March)
Status of Observation Facilities (as of 23 March 2011)Edit
Number of troubled facilities
Total number of facilities
11 March 2011
23 March 2011
Automatic Weather Stations *
(Eastern Japan) 799
(Tohoku District) 26
Seismic Intensity Stations
(Tohoku District) 88
(Tohoku District) 25
In addition, NTT docomo (a mobile telecommunication company in Japan) has provided JMA with meteorological observation data at its 5 environmental monitoring stations (verified and notified in advance) near the tsunami affected areas in Tohoku District, based on the Meteorological Service Law.