Northridge Earthquake

I learned that the magnitude of the Northridge Earthquake was 6.7 and earthquake caused very large ground motions with peak accelerations of 0.5 to 1.0 g in the Northridge area.

Japans Earthquake Tsunami

I learned that the magnitude of Japans earthquake was 8.9

Earthquake Hazards in California

 

I learned Earthquake shaking hazards are calculated by projecting earthquake rates based on earthquake history and fault slip rates, the same data used for calculating earthquake probabilities.

Seismic Waves

I learned that vibration generated by an earthquake , explosion, or similar energetic source and propagated within the Earth or along its surface. Earthquakes generate four principal types of elastic waves; two, known as body waves , travel within the Earth, whereas the other two, called surface waves , travel.