Damaging earthquakes in eastern #NorthAmerica ?
Not so often - but, yes.

On this day in 1944 a damaging M5.8 #earthquake struck near Cornwall, #ON and Massena, #NY. Chimneys came crashing down and many masonry structures were damaged. Felt from Quebec City to New York City to Toronto. Details: http://earthquakescanada.nrcan.gc.ca/historic-historique/events/19440905-en.php… http://adsabs.harvard.edu/full/1945JRASC..39....5H

@Earthquakeguy Because structures in the East are often older, they are more likely to be damaged. Folks in VA are still struggling with ruined wells, cracked foundations, etc. from the 2011 5.8 quake that so many laughed at. Historic Fredericksburg had to be evacuated in the wee hours due to a damage gas main. A real chuckle. 😡
@Nazani
Thanks, you are exactly right - the older structures in the east are more susceptible to damage.
There are also differences in the earth - in the East the old and stable rocks transmit seismic waves more effectively (especially the high-frequency shaking that impacts smaller, rigid structures). In the West the younger and more complicated earth structure is better at absorbing seismic waves. If you haven't seen this USGS webpage, you might be interested!
https://www.usgs.gov/news/featured-story/east-vs-west-coast-earthquakes
East vs West Coast Earthquakes | U.S. Geological Survey

Why was an earthquake in Virginia felt at more than twice the distance than a similar-sized earthquake in California? The answer is one that many people may not realize. Earthquakes east of the Rocky Mountains can cause noticeable ground shaking at much farther distances than comparably-sized earthquakes in the West.

@Earthquakeguy They still remember this in Massena, as I recall from living in upstate New York. And it was in the Adirondacks that I felt a three-pointer in the early 1980s, though that was centered in New Hampshire (I was in Paul Smiths, attending the college with that name and, believe it or not, living off campus on Easy Street!). Very poorly constructed housing (an old tourist cabin) and the shaking opened kitchen cabinet doors 😎 .

Different source from this, though:

https://www.adirondackalmanack.com/2012/10/the-massena-earthquake-of-1944.html

The Massena Earthquake of 1944 -

Twice within a week recently, earthquakes were felt across the North Country, and just a few minutes later, folks were chattering about it on social media. Mainstream news outlets quickly picked up the story and posted it on their websites. That’s quite a contrast to the early morning hours of September 5, 1944, when the Associated Press agent in Albany received information about an earthquake in northern New York. “Anybody killed?” he asked. When informed no one had been hurt, he showed little interest. Likewise, when the state geologist in Albany was notified that a whole lotta shakin’ was goin’ on, he said, “There is no need to be alarmed. It is improbable they » Continue Reading.

The Adirondack Almanack
@BJDeming
Thanks for this. Also - it is great to see you here!
For original notes, photos and damage reports from the Canadian side for the 1944 earthquake - see:
https://articles.adsabs.harvard.edu//full/1945JRASC..39....5H/0000005.000.html
1945JRASC..39....5H Page 5

@Earthquakeguy Thank you! Likewise, too -- I am still feeling my way onto Mastodon via this lovely Sunny Garden and haven't yet tracked down geoscience people/enthusiastc amateurs (like me), though helpful folks here showed me some ways to do that when I introduced myself.

In time. Meanwhile, it's nice to see a familiar post-er here, and especially someone who shares so much interesting information with us all. It is very much appreciated.

@BJDeming
Thanks for your kind words. I always enjoy the posts that you share - thank you!