Answer:
An increase in the frequency and intensity of felt earthquakes
Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground
Subtle swelling of the ground surface
Small changes in heat flow
Changes in the composition or relative abundances of fumarolic gases
Explanation:
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Answers & Comments
Answer:
An increase in the frequency and intensity of felt earthquakes
Noticeable steaming or fumarolic activity and new or enlarged areas of hot ground
Subtle swelling of the ground surface
Small changes in heat flow
Changes in the composition or relative abundances of fumarolic gases
Explanation: