Earthquake · reviewed by a seismologist
M 1.7ml
Earthquake near Dannemora, NY
No earthquake was likely felt in Dannemora in the 24 hours to 12:25 pm EST (17:25 UTC). The last one was M 4.0, 238 km (148 mi) WNW, at 12:36 pm EDT on 14 April 2026, estimated intensity II (weak) in town; 215 felt reports to USGS. Every earthquake near Dannemora
This page: a magnitude 1.7 earthquake was recorded 8 km (5 mi) south of Dannemora, NY, at 3:51 am EDT on 21 April 2025 (07:51 UTC), 4.0 km deep.
USGS: 8 km S of Dannemora, New York
- When
- 3:51 am EDT on 21 April 2025 ()
- Where
- 8 km (5 mi) south of Dannemora, NY · earthquakes near Dannemora
- New York today
- every earthquake in New York in the last 24 hours
- Magnitude
- M 1.7 (ml)
- Depth
- 4.0 km below the surface
- Felt
- no reports yet
- Nearest
- Clinton County, 12 km N
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 505 days ago
Earthquake alerts for Dannemora, NY
Get a notification in this browser when USGS records an earthquake near Dannemora, NY. No account or email needed.
Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 12 km (7 mi) from the epicentre. In Dannemora, 8 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Morrisonville, Peru, Plattsburgh West, Plattsburgh, Keeseville, Cumberland Head.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,000,000× the energy of this one
- Around the size people start to feel M 3.0 89× the energy of this one
- This earthquake M 1.7 about 11 lb of TNT
Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists one earthquake of M5 or more within 50 km:
- 5.3 8 km NNW of Au Sable Forks, New York · 15 km S of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 44.6481, -73.7105. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Clinton County, NY | 12 km (7 mi) | N | earthquakes near Clinton County |
| Grand Isle County, VT | 37 km (23 mi) | ENE | earthquakes near Grand Isle County |
| Franklin County, NY | 48 km (30 mi) | W | earthquakes near Franklin County |
| Chittenden County, VT | 55 km (34 mi) | ESE | earthquakes near Chittenden County |
| Essex County, NY | 60 km (37 mi) | S | earthquakes near Essex County |
| Franklin County, VT | 67 km (42 mi) | ENE | earthquakes near Franklin County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
5 earthquakes have been recorded within 50 km since this one.
- 2.0 3 km WNW of Keeseville, New York
- 1.9 6 km WNW of Morrisonville, New York
- 2.7 4 km NNW of Chazy, New York
- 1.5 3 km SE of Lyon Mountain, New York
- 2.0 3 km NW of Chazy, New York
Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.
On USGS
- The official USGS event page — the source of record for every value above
- Did you feel it? Report it to USGS — reports go to USGS, not to us
- ShakeMap for this event, when USGS has produced one
QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.