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Today’s Earthquake Fact

Before electronics allowed recordings of large earthquakes, scientists built large spring-pendulum seismometers in an attempt to record the long-period motion produced by such quakes. The largest one weighed about 15 tons. There is a medium-sized one, three stories high, in Mexico City that is still in operation.

Today in Earthquake History


October 10, 1986
M 5.5, El Salvador – One of the world's deadliest earthquakes. At least 1,000 people killed, 10,000 injured, 200,000… Read More

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