Reposted by Thom Burns
#Earthquake !
#Boston just felt a 3.9 magnitude quake! Luckily, the Plate Stacks are safe—built in 1931 with seismic isolation. Fun fact: we’ve been documenting quakes for over a century, like this plate from an Arequipa, Peru #quake on this day in 1903.
#Seismology #BostonEarthquake2025
