Geology notes november 17 for exam 3

Geology notes november 17 for exam 3 - Geology Over the...

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Geology Over the next 50 years there is a 10% chance the earthquake shaking will exceed 20xg in southeastern MO or near Charleston SC The New Madrid seismic risk is about similar to the risk of another Katrina Tsunamis are large sea waves caused by undersea earthquakes, volcanic eruptions, or landslides Tidal bores are rare and occur only on certain tides in areas with a large tidal range. The incoming tide is funneled into a shallow, narrowing river via a broad bay. Tsunami often begins with ocean retreating away from the shore -Then a flooding wave washes over the beach Tsunami waves usually do not break on the beach like wind waves Tsunami waves flood across the beach and onto the land About 75% of tsunamis are caused by undersea earthquakes -Subduction zone earthquakes are especially dangerous About 8% of tsunamis are caused by undersea landslides -Volcanoes are especially likely to collapse to produce massive landslides. About 5% of tsunamis are produced by undersea volcanic eruptions
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Geology notes november 17 for exam 3 - Geology Over the...

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