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17 February, 15:18

Question 19 Unsaved

Which of the following is NOT one of the warning signs used to predict a volcanic eruption?

1)

changing chemistry of volcanic gas

2)

development and widening of surface cracks on the volcano

3)

earthquake activity

4)

the activity of animals

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Answers (2)
  1. 17 February, 15:30
    0
    The 2nd one have a great day ... : D
  2. 17 February, 18:50
    0
    I think its

    development and widening of surface cracks on the volcano
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