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What triggers the small earthquakes that occur around a volcano before an eruption? a. upward movement of magma b. pyroclastic flow c. cooling magma inside the crust d. plate movements
The upward movement of the magma triggers the small earthquakes that occur around a volcano before an eruption.
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Asked 12/4/2017 11:50:34 AM
Updated 322 days ago|7/3/2018 4:14:49 AM
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The upward movement of the magma triggers the small earthquakes that occur around a volcano before an eruption.
Added 322 days ago|7/3/2018 4:14:49 AM
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