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


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About Janet

Janet Starr Hull, PhD, CN has expressed a deep love and respect for the Earth since she was a very young child. She earned academic degrees in International Geography and Environmental Science. After 20 years of research, Dr. Hull uncovered evidence supporting her theory that the Earth’s geographic poles shift at the axis, causing dramatic climate change. Today, she is one of the world’s leading environmental experts promoting public environmental awareness. Connect with Dr. Hull on Facebook, Twitter, and Google Plus.

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