| Term | Definition |
|---|
| Secondary waves motion | up and down |
| wave that travels through all types of matter | P wave |
| slowest wave | surface wave |
| largest earthquake recorded with seismometer | 9.5 in chile |
| earthquakes occurring each year | 1,000,000 |
| push-pull (back and forth) motion | P wave |
| earthquake occurs here | focus |
| data must be obtained from at least ____ seisometers | 3 |
| potential causes of tsunamis | asteroid, earthquake, landslide |
| largest known tsunami | lituya bay, alaska |
| most violent eruptions of volcano | composite cone |
| shield volcanoes | liquid, easily flowing nature of their lava |
| supervolcanoes of last million years | mt. toba and yellowstone |
| last supervolcanic eruption | mt. toba 78,000 years ago |
| largest supervolcanic eruption in past 2.5 million years emitted | 2800km3 |
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