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Keywords:

  • seismic swarms;
  • Pollino range

According to the U.S. Geological Survey's Earthquake Hazards Program, a seismic swarm is “a localized surge of earthquakes, with no one shock being conspicuously larger than all other shocks of the swarm. They might occur in a variety of geologic environments and are not known to be indicative of any change in the long-term seismic risk of the region in which they occur” (http://vulcan.wr.usgs.gov/Glossary/Seismicity/description_earthquakes.html).