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Chapter Four Vocabulary - Recurrence interval-the average...

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Chapter Four Vocabulary- Foreshocks- minor earthquakes that may warn of major earthquakes. Microearthquakes- precisely determine the focus of large numbers of minute earthquakes. Forecast- early warning signs provide a good opportunity to save lives and property, they also raise complex political issues. Paleoseismology- the study of prehistoric fault movements. Seismic gaps- a section of an active fault that has not had a recent earthquake. Earthquakes elsewhere on the fault suggest that the gap may have an earthquake in future. Migrating earthquakes- Earthquakes that occur in a sequential manner along a fault over time.
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Unformatted text preview: Recurrence interval-the average number of years between an event of certain size in a location- for example, floods, storms surges, and earthquakes. Also known as a return period. Risk Map- Seismologists use what they learned about probabilities of where and when an earthquake will strike to estimate the risk for a given area. Retrofitting- modifying existing buildings to minimize the damage during strong earthquake motion. Base Isolation- Seismic engineers have tried to minimize the shaking and therefore the damage by isolating buildings from the shaking ground....
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