Earthquake Swarms At Canary Islands, Puerto Rico, and Mariana Islands

Large earthquakes get our attention for many reasons, but sometimes, the earthquake swarms can be more dangerous than the big quakes.

Earthquake swarms are a sign of major earth movement, and they also warn of underlying volcanic activity. Either way, earthquake swarms are a warning to pay attention before major damage is done.

Right now, there are three areas of significance that are experiencing earthquake swarms :

  1. Canary Islands; approx 120 quakes above 1.8 magnitude and more than 40 quakes up to 3.2 magnitude in the past 24 hours
  2. Puerto Rico; occurring at same time the US Craton quakes occurred
  3. Mariana Islands; on the volatile Ring of Fire and SW of the Mariana Trench/subduction zone.
Small USGS globe of Puerto Rico in the Caribbean Sea

Earthquake swarm at Puerto Rico in the Caribbean Sea – USGS

The USGS small globe showing the 5.9 Earthquake off the Azores Islands, Portugal on April 30, 2013.

Earthquake swarm at the Canary Islands in the Atlantic – USGS

USGS small globe of Mariana Islands

Earthquake swarm north of the Pacific Mariana Islands – USGS


7.0 Magnitude Quake Sets Off A String of Quakes Along Pacific Rim

A picture of the Earth with an earthquake crack going down the USA and S America

Increase in earthquake intensity along the Pacific Rim

A 7.0 magnitude earthquake on the Northern Mariana Islands on May 13, 2013 was followed by a string of large quakes along the Pacific Rim.

May 14, 2013

5.6 Northern Sumatra

5.0 Tonga

5.7 Peru

5.0 Papua New Guinea

5.7 Papua New Guinea

 Volcanic Activity

Keep a watch for increased volcanic activity along the Pacific Ring Of Fire. Alaska’s Cleveland Volcano is becoming more active, and volcanoes in Mexico, Ecuador, Japan, Hawaii, and the Philippines have increased in activity.

A picture of a volcano erupting.

Increase in volcanic activity along the Ring of Fire.