Tuesday, April 5, 2011

More information on tsunami wave heights along the Japanese coast

Information from NOAA (National Oceanographic and Atmospheric Administration) on the maximum tsunami heights along the Japanese coast is a bit more subdued than the information I listed in the last post:
The highest wave from the March 11, 2011 tsunami was 13 meters reported by an eyewitness at Minami Sanriku town. Tide gauge recordings in Japan range from 1 to 7 meters. Three meter waves were observed by eyewitnesses in the Kuril Islands, Russia. Two meter waves were observed at tide gauges in South America, Hawaii, and the west coast of the United States. The highest wave ever recorded by an ocean-bottom sensor was measured at 1.08 meters by DART® station 21418 located 450 nautical miles northeast of Tokyo. NGDC [National Geophysical Data Center] will continue to update the historic tsunami database as eyewitness and field survey reports are received.
The map below shows the near-field effects of the event including deaths, missing, maximum wave heights and arrival times at tide gauges, water heights from field surveys (data current as of March 28, 2011, will be updated weekly).
Source: NGDC/NOAA. Click to enlarge

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