The 2011 off the Pacific coast of Tohoku Earthquake -Portal-

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."

More Info on Aftershock / Aftershock Outlook

After the earthquake on 11 March, many weather observation data from AMeDAS (JMA's automated weather observation and collection system) stations in Northern Japan had been suspended due to tsunami damage, network failure, and power outage. As of 15 April, JMA has resumed most of its AMeDAS stations. You can see the related story on recovery of weather observation systems.

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.
Observed Data in last 6 hours (Japanese)

• Centroid Moment Tensor Solution
• Source process analysis with local strong motion data
• Distribution of JMA Seismic Intensity
• Tsunami Warnings and Advisories
  (11Mar 15:33JST, 12Mar 03:20JST, 12Mar 13:50JST, 12Mar 20:20JST, 13Mar 07:30JST)
• Observed Tsunami
• Location of the Main Shock and Aftershocks
• Cumulative Number of Aftershocks (Magnitude>=5.0)

• Tsunami Warnings/Advisories
• Earthquake Information

• Monitoring of Earthquakes, Tsunamis and Volcanic Activity

Weather Warnings/Advisories

Fukushima, Iwate, Miyagi, Yamagata, Aomori, Akita, Ibaraki

Daily Weather Forecast

Fukushima, Iwate, Miyagi, Yamagata, Aomori, Akita, Ibaraki

Three-hourly Forecast

Fukushima, Iwate, Miyagi, Yamagata, Aomori, Akita, Ibaraki

• Three-hourly Distribution Forecast

One-week Forecast

Fukushima, Iwate, Miyagi, Yamagata, Aomori, Akita, Ibaraki

Local Weather Information around Fukushima Nuclear Power Stations

• Fukushima Daiichi and Daini Power Stations (PDF file - 100 Kbytes in Japanese)
• Wind Forecast in Hamadori (Fukushima Prefecture)
  -> please see three-hourly forecast for Fukushima

Weather at Airports and Airspace

• Aerodrome Observations (METAR)
• Aerodrome Forecasts (TAF)
• Aerodrome short-term sequential forecasts
  Aomori (RJSA)
  Sendai (RJSS)
  Akita (RJSK)
  Fukushima (RJSF)
  Niigata (RJSN)
  Hanamaki (RJSI)
  Yamagata (RJSC)
• FBJP - Domestic SIGWX Prognostic Chart

Wind, Wave and Tide Forecast at Marine Ports (PDF)

• Aomori Pref.
  Aomori (Wind and Wave / Tide)
  Hachinohe (Wind and Wave / Tide)
• Iwate Pref.
  Kuji (Wind and Wave / Tide)
  Miyako (Wind and Wave / Tide)
  Kamaishi (Wind and Wave / Tide)
  Ofunato (Wind and Wave / Tide)
• Miyagi Pref.
  Ishinomaki (Wind and Wave / Tide)
  Shiogama (Wind and Wave / Tide)
• Fukushima Pref.
  Soma (Wind and Wave / Tide)
  Onahama (Wind and Wave / Tide)

AMeDAS (Automated Weather Station Network)

• Hourly Observations (Select Prefecture from Tohoku)
• Northern Tohoku District
• Southern Tohoku District

Weather Observation at Airports

• Hourly Observations (Select Airport)

• A strong aftershock of "The 2011 off the Pacific coast of Tohoku Earthquake" occurred Monday 11 April (12 April 2011)
• A strong aftershock of "The 2011 off the Pacific coast of Tohoku Earthquake" occurred Thursday 7 April (8 April 2011)
• Lowering criteria for warnings and advisories of heavy rain and flooding in the earthquake affected area (30 March 2011)
• The 2nd Message from Dr. Hatori, Director-General of the Japan Meteorological Agency on "The 2011 off the Pacific coast of Tohoku Earthquake" (25 March 2011)
• Lowering criteria for heavy rain warnings or advisories in the earthquake affected area (25 March 2011)
• Increase of the risk of the submergence and flood during the spring tide associated with the ground sink caused by the 2011 off the Pacific coast of Tohoku Earthquake (17 March 2011)
• The 2011 off the Pacific coast of Tohoku Earthquake ~fourth report~ (16 March 2011)
• The 2011 off the Pacific coast of Tohoku Earthquake ~third report~ (15 March 2011)
• Message from Dr. Hatori, Director-General of the Japan Meteorological Agency on "The 2011 off the Pacific coast of Tohoku Earthquake" (15 March 2011)
• The 2011 off the Pacific coast of Tohoku Earthquake ~second report~ (14 March 2011)
• The 2011 off the Pacific coast of Tohoku Earthquake ~first report~ (13 March 2011)

• Countermeasures for 2011 Tohoku - Pacific Ocean Earthquake (Prime Minister of Japan and His Cabinet)
• Information about the 2011 off the Pacific coast of Tohoku Earthquake (Ministry of Foreign Affairs of Japan)
• Portal site on Policies for Foreign Residents (Cabinet Office)
• Information for Foreigners on 2011 Tohoku-Pacific Ocean Earthquake (Ministry of Internal Affairs and Communications)
• 2011 Tohoku district -- off the Pacific Ocean Earthquake (Ministry of Land, Infrastructure, Transport and Tourism)