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If geologists detect many small earthquakes in the area near a volcano, what can they infer about the volcano?

User Noko
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Detecting small earthquakes near a volcano is usually a sign that it is becoming active and may erupt soon. As magma moves up into the magma chamber it exerts pressure on the surrounding rocks causing them to move. These earthquakes are usually small and are not destructive.
User Misko Hevery
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