1.Previous
3.Next

was deployed to record its aftershocks. Data from the seismograph would eventually determine that the mainshock was produced along a shallow crustal fault.

In 1926, Harold Jeffreys was the first to claim, based on his study of earthquake waves, that below the mantle, the core of the Earth is liquid.

In 1937, Inge Lehmann determined that within Earth's liquid outer core there is a solid inner core.

1.Previous
3.Next