Earthquakes. Earthquake. An earthquake is the vibration of Earth produced by the rapid release of elastic energy accumulated in rocks. Earthquakes occur when: Elastic energy exceeds rock strength and the rock breaks forming a fault .
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An earthquake is the vibration of Earth produced by the rapid release of elastic energy accumulated in rocks. Earthquakes occur when:
Released energy is in the form of waves, which cause movement on the earth’s surface and interior
An earthquake occurs in Pakistan. Pakistanis report a magnitude of 6.2. Scientists in California would probably measure a magnitude of:
Richter Magnitude (ML)
Moment Magnitude (Mm)
The table at the right shows the amount of energy released (in terms of TNT needed) for Richter Scale measurements (corrected to account for saturation)
Friction along sliding blocks (transform faults)