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.

Batholith

I learned that a batholith is a main magma chamber and it ranges from hundreds to thousands of cubic kilometers across km beneath earths surface.

strata vs. shield volcanoes

Shield Volcano is made up of basalt like Hawaii. It's slopes are made by liquid basalt lava that pushes up from a vent under the ground.

More than one kind of magma builds up in Stratovolcanoes. They are basalt, andesite, dacite, and rhyolite magma.

Gulf Current

I learned a current of warm water that keeps Western Europe warm is the Gulf Stream and 71% of the world is covered by Ocean Water.