EARTHQUAKES

Destruction From Earthquakes

1. Intensity of the earthquake
2. Duration of the vibrations
3. The nature of the ground material
4. Design of the structure

Tsunami or Seismic Sea Waves

• 300-600 mph
• produced by earthquakes, submarine landslides, volcanic eruptions, and meteorite impacts
• in the open ocean, waves are only 1 meter
• in shallow water, the wave can reach 30 meters
• first sign is water withdrawing from the beaches
• seismograms act as warning system for tsunamis