Three Years Later: Tohoku Earthquake and Tsunami

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 which hit Hawaii and the West Coast caused relatively minor damage, it reminds us of the need to be aware of how tsunami alerts and warnings are issued. There are various alerting tools available, including the City’s Outdoor Public Warning siren system (Tuesday Noon Sirens); Wireless Emergency Alerts; and AlertSF, our text-based message system that delivers emergency information to mobile phones and other text-enabled devices, as well as email accounts. DEM also issues public alerts and warnings on Facebook and Twitter (@sf_emergency). In an emergency, the SF72 Crisis Map will also serve as San Francisco’s real-time information hub.  You’ll find official updates, reports from our partners, and crisis map to navigate city resources.

SF Tsunami Walk

The last week in March 23-29 is National Tsunami Preparedness Week and San Francisco is hosting our annual tsunami preparedness walk. The SF Tsunami Walk begins on Saturday March 29 at 10:30 AM at the Marina Green (Marina & Scott).  For more details visit www.sfdem.org/tsunamiwalk.

In addition to the Tsunami Walk, the San Francisco Department of Emergency Management is conducting a three-day (March 26-28) tsunami exercise to practice with City’s alert and warning procedures, response capabilities, and recovery operations in a tsunami.

For information on how can you become better prepared visit www.sf72.org.

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Posted on March 11, 2014, in Alert and Warning, Disasters, Recovery, Resilience, Stories and tagged , , , , , , , , . Bookmark the permalink. 1 Comment.

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