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Unformatted text preview: -massive eruption 13,000 years ago ash fell in Wyoming Collapse of Lava Domes-can cause landslides-pyroplastic flow o volcanic rocks break off and race down the mountain very hot-can change ecosystems and habitat Lahar volcanic mudslide with ash Mount Rainier-100,000 live on deposits of previous lahars-lahars that reach Puget sound occur at least 1 in 500 to 1,000 years about 1 in 7 chance of one occurring within a lifetime-little to no warning of a lahar Predictability of Volcanic Eruptions-specific events: considerable difficulty in predicting times/dates and magnitudes Volcanic Eruptions: Attempts at Prediction-precursor seismic activity-rock deformation and measurements-emission of gases and smoke Why Would Anyone Live Near a Volcano?-fertile soils-scenic landscapes or-ignorance and optimism many volcanoes are considered dormant or extinct o even active volcanoes may not erupt for decades...
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- Spring '07