classifying earthquakes Flashcards
1
Q
earthquakes
A
- release of stress that has built up within the earth’s crust caused by tension, compression or shearing of rock
- occur daily at different scales
- unpredictable = hard to detect
2
Q
earthquake statistics
A
- 2000-2015 -> 800,000-900,000 people killed in earthquakes
- Average 100 large earthquakes annually
3
Q
seismicity
A
the occurrence or frequency of earthquakes in a region
4
Q
seismogram / seismograph
A
- records and measures the ground shaking
- records the energy and magnitude of an earthquake
5
Q
shallow focus
A
- concerning for us because they’re shakes closer to the surface
6
Q
deep focus
A
- close to the ocean floor
7
Q
what plate margin are they prevalent on
A
conservative plate margins
