1001 Questions Answered about Natural Land DisastersDodd, Mead, 1969 - 350 pages |
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Page 70
... active today ? Scientists estimate that about 500 to 600 volcanoes are active in present times . A volcano is considered " active " if it has erupted at least once in recorded history . An estimated 2,500 volcanoes have been active ...
... active today ? Scientists estimate that about 500 to 600 volcanoes are active in present times . A volcano is considered " active " if it has erupted at least once in recorded history . An estimated 2,500 volcanoes have been active ...
Page 87
... active vol- canoes erupt along zones very close to seismically active regions , where earthquakes occur , geologically young mountains are pushing up , and the earth's crust is under strain . 271. Where is the Ring of Fire ? The ...
... active vol- canoes erupt along zones very close to seismically active regions , where earthquakes occur , geologically young mountains are pushing up , and the earth's crust is under strain . 271. Where is the Ring of Fire ? The ...
Page 88
... active volcano belt , well known to ancient European civilizations , lies under the Mediter- ranean Sea , forming ... active volcanoes located ? One of the most turbulent concentrations of active volcanoes in our present era is along an ...
... active volcano belt , well known to ancient European civilizations , lies under the Mediter- ranean Sea , forming ... active volcanoes located ? One of the most turbulent concentrations of active volcanoes in our present era is along an ...
Common terms and phrases
acres active Alaska America amount ancient Atlantic Ocean avalanche basin beneath buildings burning California called caused cent century channel cities coast crater crops crust crystals cubic damage dams debris deep desert destroyed destructive disaster drought earth earthquake energy eruption explosion fall fault feet high flood plains forest fires fresh water gases geologists glacier goats ground water Hawaii heat inches island Japan killed Krakatoa lakes land landslides lava flows layer magma magnitude mass material melt million moisture Mount Pelée mountain move mudflow North occur Pacific Ocean plants pressure quake rain rainfall rats recorded regions reported reservoirs rise river rock San Andreas Fault scientists sea waves seismic seismic waves seismograph seismologists slide slopes snow soil sometimes speed square miles streams temperature tons trees tsunami U.S. Forest Service U.S. Geological Survey United valley vapor vegetation volcano warning weather wind zone