The 4 synchronous large earthquakes off Chile (2 M6.7 and 2 M6.8) Dec29 by Joseph Saraceno Depending on the app you use, three or four strong earthquakes hit off Chile on December 27, 2020 at 9:39 pm UTC. These are called synchronous quakes, each of them having a ‘s-wave’ and a ‘p-wave’ MORE Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on Google+ (Opens in new window) Related