Today’s Earthquake Fact
The core of the earth was the first internal structural element to be identified. In 1906 R.D. Oldham discovered the core from his studies of earthquake records. The inner core is solid, and the outer core is liquid and does not transmit the shear wave energy released during an earthquake.
Today in Earthquake History
September 24, 1910
M , Arizona – September 23 local time. Intensity VII At Cedar Wash, a house was moved off its foundation, its chimney was shaken down, and one corner… Read More