Puerto Rico had a swarm (or sequence) of earthquakes at the end of 2019 and the start of 2020. So far, the largest was a magnitude 6.4 on January 7, 2020. Since around December 28, there have been more than 1000 quakes in the region. Several researchers have made plots of the activity, posting on twitter, facebook and other social media.
Pablo Ampuero (@DocTerremoto) suggested I plot the east/west location of the quakes. Each dot is a quake, sized by the magnitude.
I saw a great 3D visualization by Anthony Lomax. I can't make the same plot (yet?), but have started. I'm moving my 3D plot to another page.
This sequence is still far from over. Many persons in southwest Puerto Rico have lost their homes, or are afraid to enter them. If you want to help, please reach out to local organizations. I can recommend these two sites: