GEOG 1 Lecture Notes - Lecture 28: Epicenter, Seismic Gap, Seismometer
Document Summary
Elastic strain can be though of as temporary deformation, when the stress is released, the elastically deformed material returns to its original shape. Long-term predictions can result from examining historical data, research, and mapping of previous and historical events. A record of activity can provide an estimate of the recurrence interval (how often an earthquake will occur or repeat itself). Similarly, if there has been a large break in activity when an earthquake should have occurred based on the recurrence interval then it is expected that one is overdue and could happen soon. This is referred to as a seismic gap. Geological survey of canada and the us have developed programs to reduce earthquake hazards, and has 5 main goals. Operate national seismograph networks to detect and located all earthquakes larger than m 3. 5. Develop an understanding of earthquake sources by obtaining info on the physical properties and mechanical behaviour of faults.
