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Earthquake Notes. Elastic Rebound. Elastic Rebound. Fault and Joint. Fault: Joint:. Faults. San Andreas Fault. Focus & Epicenter. Seismograph. Seismograph. Foreshocks & Aftershocks. Earthquake Waves Seismic Waves. Body Waves Primary Wave:

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Fault and joint
Fault and Joint

  • Fault:

  • Joint:








Earthquake waves seismic waves
Earthquake WavesSeismic Waves

  • Body Waves

    • Primary Wave:

    • Secondary Wave:


Earthquake waves seismic waves1
Earthquake WavesSeismic Waves

  • Surface Waves


Seismic waves
Seismic Waves

  • Seismic WavesVideo

  • Recent Seismic Activity

http://quake.usgs.gov/recenteqs/Anim/index.html


Earthquake intensity scales
Earthquake Intensity Scales

  • Mercalli:

    • Measures the amount of damage done at each location


Earthquake intensity scales1
Earthquake Intensity Scales

  • Richter

    • Measures the amount of energy released at the focus of the earthquake.

Richter TNT for Energy Yield (approximate)

1.0 30 pounds Large Blast at a Construction Site

2.0 1 ton Large Quarry or Mine Blast

3.0 29 tons

4.0 1,000 tons Small Nuclear Weapon

5.0 32,000 tons

6.0 1 million tons

7.0 32 million tons, Largest Thermonuclear Weapon

8.0 1 billion tons San Francisco, CA Quake,

9.0 32 billion tons

10.0 1 trillion tons

12.0 160 trillion tons (Fault Earth in half through center, OR Earth's daily receipt of solar energy)