Residents across the Lake Champlain Valley got a late-night surprise Monday when a small earthquake briefly rattled parts of northern New York and Vermont.
By The Watertown Post Staff | October 14, 2025
Residents across the Lake Champlain Valley got a late-night surprise Monday when a small earthquake briefly rattled parts of northern New York and Vermont.
According to the U.S. Geological Survey (USGS), a magnitude 2.6 tremor struck just outside Chazy, New York — roughly 25 miles south of Montreal — at 11:40 p.m. ET. The quake occurred at a shallow depth of about five miles, sending a quick jolt through the region that was felt as far as Plattsburgh and Alburgh, Vermont. More than 100 people reported the shaking to the USGS.
A Rare Rumble in the North Country
What makes this event notable is where it happened: far from any tectonic plate boundary. The quake originated deep within the North American Plate, making it a rare “intraplate” earthquake. Tremors like this are unusual in the Northeast, where ancient, buried fault lines occasionally release built-up stress from eons past.
The Chazy area sits along the Champlain Thrust Fault Zone, a massive geological feature stretching from southern Quebec through western Vermont and into eastern New York. The fault dates back roughly 450 million years to the Taconic Orogeny, when proto–North America collided with an island chain that would later form part of New England. Though ancient, the fault isn’t completely dormant — and every once in a while, it still stirs.
No Damage, But Plenty of Buzz
There were no reports of damage or injuries, though local emergency officials advised homeowners to inspect their foundations for cracks as a precaution. The tremor was described as “a short, sharp jolt” by several residents — over in Plattsburgh, a few locals even thought a truck had hit their house.
Historical Context
This wasn’t the first time the North Country has shaken.
- In 1944, a magnitude 5.8 quake near Massena, NY and Cornwall, Ontario caused about $20 million in damage — still the largest on record for the region.
- A 4.9 quake in 1983 and a 5.0 near Plattsburgh in 2002 both caused minor damage.
According to the USGS, moderately damaging earthquakes strike somewhere in the region every few decades, while smaller ones like this tend to show up every three to four years.
The Takeaway
Monday’s rumble was a reminder that the ground beneath us in Upstate New York is still very much alive, even if it takes a few hundred million years between wake-up calls.
While scientists say it’s nothing to lose sleep over, it’s another fascinating chapter in the long and restless history of the Adirondack region’s ancient geology — a region that’s quiet most of the time, until it decides not to be.
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