Which of the following is not a sign of an impending volcanic eruption?
A. Increased seismic activity
B. A decrease in sulfur dioxide emissions
C. The appearance of new cracks or vents
D. Increased gas emissions
Answer:B
Which of the following is not a sign of an impending volcanic eruption?
A. Increased seismic activity B. A decrease in sulfur dioxide emissions C. The appearance of new cracks or vents D. Increased gas emissions