The Washington Post has a good article about East coast quakes--apparently the tremors are felt for longer distances than on the West coast,
Quote:
It has long been known that earthquake shaking travels farther on the East Coast than on the West Coast.
The USGS says earthquakes can be felt over an area 10 times larger on the East Coast.On the West Coast, “the rocks are warmer, so they are more active, they’ve experienced activity more recently — so they’re warmer and will attenuate or absorb some of the seismic energy as they pass through that rock,” Carchedi said.
By contrast, the rocks are cold and brittle on the East Coast, and they transfer seismic energy much better than the West Coast.
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Some interesting stuff in this article (gift):
https://wapo.st/3U6JnVO
And I did feel the aftershock -- not as dramatic, but enough to rattle the same sliding door as the original episode.