Earthquakes
Earthquake – a sudden shaking of the ground
Earthquakes get their energy from sudden slipping of the earth’s crust
Earthquakes get their energy from sudden slipping of the earth’s crust
•Fault – a fracture in the crust where one side has moved compared to the other
Here's a youtube on the Wasatch Fault if you're interested:
http://geology.utah.gov/utahgeo/hazards/eqfault/wfault_flyby.htm
•Focus – place on the fault where the crust breaks and energy is released
•Epicenter – location on the surface of the earth directly above the focus
Here's a youtube on the Wasatch Fault if you're interested:
http://geology.utah.gov/utahgeo/hazards/eqfault/wfault_flyby.htm
•Focus – place on the fault where the crust breaks and energy is released
•Epicenter – location on the surface of the earth directly above the focus
Waves from earthquakes
Primary Wave (P) - Compression Wave. Fastest moving seismic wave. Travels through solids, liquids, and gases.
Secondary Wave (S)- Shear wave. Second fastest wave. Can travel through solids.
Surface Wave - The slowest wave. They cause the
most damage.
Magnitude- A measure of the energy released by an earthquake as measured on the Richter Scale, which goes from 1 (weakest) to 10 (strongest).
Seismograph- Instrument used to measure earthquake magnitude.
Liquefaction- Water is shaken to the surface and the soil becomes an unstable, fluid-like substance. Watch the following youtube video to understand liquefaction a little better.
http://www.youtube.com/watch?v=JrAaHmOErrQ
Seismograph- Instrument used to measure earthquake magnitude.
Liquefaction- Water is shaken to the surface and the soil becomes an unstable, fluid-like substance. Watch the following youtube video to understand liquefaction a little better.
http://www.youtube.com/watch?v=JrAaHmOErrQ