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During post-tsunami field surveys, inundation and runup measurements are taken to describe the tsunami effects. Inundation is defined as the maximum horizontal distance inland that a tsunami penetrates. Runup is the maximum vertical height above mean sea level that the sea surface attains during a tsunami. Actual tsunami wave heights can be measured from the amplitude of the wave signals seen on sea level or tide gauge instruments.

Today in Earthquake History

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April 25, 1992
M 7.2, California – Ninety-eight people injured and considerable damage in southwestern Humboldt County. Preliminary estimate of damage in this area from… Read More

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