Earthquakes Exam 2b

Earthquakes Exam 2b - -PAGE 1 FORM 1- GEOL 171 EARTHQUAKES...

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-PAGE 1 FORM 1- Geol 171 Exam 2 Form #1, Tuesday October 9, 2007. GEOL 171 EARTHQUAKES AND NATURAL DISASTERS, EXAM #2 1. When magma is on the move at shallow depths _________________. A. it does so quietly without generating earthquakes B. it commonly generates a swarm of small earthquakes referred to as delirium tremens C. it commonly generates a swarm of large earthquakes referred to as delirium tremens D. it commonly generates a swarm of small earthquakes referred to as harmonic tremors E. it commonly generates a swarm of large earthquakes referred to as harmonic tremors 2. In 1883, this volcano exploded and the resulting tsunami killed 36,000 people on Java and Sumatra. A. Mt. St. Helens B. Pelée C. Santorini D. Vesuvius E. Krakatau 3. During the summer of 1783, the greatest lava eruption of historic times poured forth at ___________, accompanied by the release of an enormous volume of gases that enshrouded much of northern Europe in a "dry fog" or blue haze rich in SO 2 (one of the visible components of today's urban smog). A. Pinatubo, Philippines B. Vesuvius, Italy C. Stromboli, Italy D. Ararat, Turkey E. Laki, Iceland 4. In August 1986, a gigantic volume of gas belched forth from Lake Nyos in Cameroon and swept down the adjacent valleys asphyxiating 1700 people. The gas was _______________. A. sulfur dioxide B. carbon dioxide C. hydrogen sulfide D. carbon monoxide E. A mixture of all of these. 5. The most dangerous volcanoes tend to be in the same general plate tectonic settings as the largest earthquakes in the world. True False 6. The most peaceful eruptions are _______________. A. Icelandic type B. Plinian eruptions C. Strombolian eruptions D. Vulcanian eruptions 7. In Icelandic-type eruptions, low viscosity, low-volatile content lava erupts peacefully. True False 8. The radiocarbon process of documenting major eruption dates for volcanoes in the past 50,000 years or so is the same as that used to work out dates of major prehistoric earthquakes. True False
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-PAGE 2 FORM 1- Geol 171 Exam 2 Form #1, Tuesday October 9, 2007. 9. A genuine success story of advance warning before a large eruption occurred in the Philippines in 1991 before the climactic eruption of ___________________. A. Mt. Mayon B. Nevado Del Ruiz C. Mont Pelée D. Mt. Pinatubo E. Popocatepetyl 10. Which four states account for 91% of all U.S. earthquakes of magnitude 3.5 and above? A. California, Alaska, Washington, Oregon B. California, Alaska, Washington, Hawaii C. California, Alaska, Hawaii, Nevada D. California, Hawaii, Washington, Nevada E. California, Hawaii, Nevada, Idaho 11. Many of the deaths at Mt. St. Helens on May 18, 1980 were related to __________________. A. the earthquake that preceded the eruption B. people being overcome by fast-flowing basaltic lava C. ash fall hundreds of miles away D. suffocation from a carbon dioxide cloud E. the effects of lateral blast 12. In the 1989 Loma Prieta quake, the Marina District building collapses were extensive, and numerous destructive fires
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Earthquakes Exam 2b - -PAGE 1 FORM 1- GEOL 171 EARTHQUAKES...

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