Russian Cluster
A whole bunch of earthquakes, concentrated in one specific area of Russia on the Pacific Coast.
Right on the Ring Of Fire.
One of those squares, covered by smaller ones, represents a very strong 7.7 quake that hit last night.
Very interesting activity. Often, a residual quake of comparable size can happen on the other side of the plate.
That would be spooky, if it happens on our west coast.