Three Years Later: Tohuku Earthquake and Tsunami

San Francisco DEM

Today marks the third anniversary of the Tohoku, Japan Earthquake and Tsunami. The earthquake was a magnitude 9.0 and was the most powerful known earthquake ever to have hit Japan. The earthquake triggered powerful tsunami waves that reached heights of up to 133 feet and traveled up to six miles inland. 

Immediately after the earthquake, the National Oceanic and Atmospheric Administration’s (NOAA) Pacific Tsunami Warning Center and the West Coast and Alaska Tsunami Warning Center both issued tsunami warnings for Hawaii, the U.S. West Coast, Alaska and the island territories in the Pacific. A tsunami warning is the highest level of alert so DEM got to work, gathering in the early morning hours at our Emergency Operations Center and began issuing public alerts and warnings about the tsunami expected to hit the California coast line. Thankfully, the tsunami caused little damage. We were lucky.

While the tsunami generated by the Tohoku Earthquake…

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