The 6.4Mw 2019–20 Puerto Rico earthquakes kill four and injure nine in southern Puerto Rico.

Starting on December 28, 2019, and progressing into 2020, the southwestern part of the island of Puerto Rico was struck by an earthquake swarm, including 11 that were of magnitude 5 or greater. The largest and most damaging of this sequence was a magnitude 6.4 Mw, which occurred on January 7 at…