Magnitude 6.4 Earthquake in Puerto Rico | U.S. Geological Survey - USGS.gov
https://www.usgs.gov/news/featured-story/magnitude-64-earthquake-puerto-rico
WebJan 7, 2020 · In a new report released today, USGS experts estimated that aftershocks from the magnitude 6.4 Jan. 7, 2020, earthquake will persist for years to decades, although with decreasing frequency. Additionally, earthquakes will likely be …
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