Harmonic tremors are ____.
A) strong earthquakes generated by an eruption
B) strong aftershocks generated after an eruption
C) the effect of magma dome collapse
D) weak earthquakes that precede an eruption
E) the effect of large gas emissions
Correct Answer:
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Q21: Any volcanic mud or debris flow is
Q22: Warnings of volcanic mudflows _.
A)are only possible
Q23: The threat of volcanic disaster from volcanoes
Q24: Which statement about the danger of volcanoes
Q25: There has been some success demonstrated in
Q27: The predominant weather in the Pacific Northwest
Q28: The greatest clear danger posed by California's
Q29: Ash eruptions form their own volcanic _
Q30: The caldera now filled by Crater Lake
A)is
Q31: Forecasts of the Mt. St. Helens eruption
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