A massive earthquake swarm of 700 quakes has struck El Salvador all within 24 hours. This seems to be a unprecedented number of quakes to strike within a certain area. What could be causing all these quakes?
A massive earthquake swarm of 700 quakes has struck El Salvador all within 24 hours. This seems to be a unprecedented number of quakes to strike within a certain area. What could be causing all these quakes?
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