Answer:
Increase in the frequency of volcanic quakes with rumbling sounds; occurrence of volcanic tremors.
Increased steaming activity; change in color of steam emission from white to gray due to entrained ash.
Crater glow due to presence of magma at or near the crater.
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Answers & Comments
Answer:
Increase in the frequency of volcanic quakes with rumbling sounds; occurrence of volcanic tremors.
Increased steaming activity; change in color of steam emission from white to gray due to entrained ash.
Crater glow due to presence of magma at or near the crater.