So let’s talk about quakes along the Atlantic seaboard. Unlike the west coast, there is no active plate boundary between the Atlantic oceanic crust and the North America continental crust 1/

It’s what we call a passive margin. New crust is created at the mid-Atlantic ridge, widening the Atlantic ocean. But the Atlantic & North American plates are glued together 2/

So the East Coast does not have faults like the San Andreas. But large earthquakes do occasionally strike along what @GeoGinger & her advisor called a passive-aggressive margin 3/

Cape Ann in 1755, Charleston in 1886, 1929 Grand Banks. The latter two were close to M7. Earthquake hazard on the east coast is a lot lower than in the west, but the region is a lot less well prepared 4/

As we’re all thinking about pandemic supplies, don’t forget the supplies that might not be an issue during a pandemic, but could be in an earthquake: water, flashlights, shoes next to your bed, first aid supplies, etc #daretoprepare 5/5