Mysterious shallow earthquake swarms rattle El Salvador and Puerto Rico – Possible volcano eruption and tsunami?

Yesterday, two earthquake swarms have been reported. One in El Salvador and the other in Puerto Rico.

This increased seismic activity at shallow depths is most probably related to the awekening of new faults in the area.

1. Earthquake swarm rattles El Salvador

One day after 555 earthquakes rattled the San Miguel volcano, another swarm of 121 shallow quakes hit this time the city of Alegría, Usulutá.

And that is just 51 km – 31 miles – from the volcano!

They may be linked to the increased seismic acticity measured at the volcano Chaparrastique. In any cases, the microquakes have triggered important damages.

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This series of shallow earthquakes may be linked to the increased seismic acticity measured at the volcano Chaparrastique. In any cases, the microquakes have triggered important damages.

2. Earthquakes swarm Puerto Rico and region

Another fact is that the region around Puerto Rico is also very active these days. Within 4 day, more than 30 minor earthquakes occurred. Only yesterday about 25 quakes hit the region of the island.

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United States Geological Survey

These shallow earthquakes are most probably due to movements along the Puerto Rico trench, a 800 kilometres (497 mi) long fault, along which a strong earthquake could produce a dramatic tsunami. The last tsunami that engulfed Puerto Rico was directly after the 1918 San Fermín earthquake.

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