Today in Earthquake History

Today's Earthquake Fact:
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.

Year at a Glance

August

Note: All earthquake dates are UTC, not local time.

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Year	Location	Magnitude	Comment

1968	Northern Celebes	7.4	In the Manimbaja Bay area, between Tandjung, Manimbaja, and Sabang, Sulawesi, slipping of the fault resulted in subsidence of 2 to 3 meters on part of the coast, and the apparent raising of Togian Island. Tsunami waves, reaching up to 300 meters inland, took some 200 lives and destroyed 700 houses. Wave heights were estimated at 8 to 10 meters From United States Earthquakes, 1968.

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