Consider the following statements:
1. Swarms are large numbers of small earthquakes that occur in a region for months without a major earthquake.
2. The most powerful earthquakes occur along the Wadati Benioff zone.
3. The Alpine Belt (Himalayas and Alps) accounts for more than two-third of all earthquakes on the earth.
Which of the statements given above are correct?
1
1 and 2 only
2
2 and 3 only
3
1 and 3 only
4
1, 2 and 3