M2.8 Earthquake 8 km WNW of Massena, New York — July 14, 2021
2021-07-14 23:35:50 UTC (2021-07-14) · approx. 6:35 PM UTC-5 local
Felt by 179 people across surrounding communities.
On July 14, 2021 at 23:35 UTC, a magnitude 2.8 shallow crustal earthquake struck 8 km WNW of Massena, New York, at a depth of 7.1 km and coordinates 44.9611°, -74.9924°.
Physical scale: An earthquake of magnitude 2.8 releases seismic energy equivalent to roughly 239 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 52 m — a useful intuition for the size of the slip patch on the fault.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 179 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-74.9924°E
Technical Information
Common Questions
How strong was the magnitude 2.8 earthquake near Massena, New York?
The magnitude 2.8 earthquake that struck 8 km WNW of Massena, New York on July 14, 2021 at 23:35 UTC had a depth of 7.1 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 44.9611°, -74.9924°, which is 8 km WNW of Massena, New York.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 2.8 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000em1a). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 14, 2021). M2.8 Earthquake 8 km WNW of Massena, New York — July 14, 2021. Retrieved September 17, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000em1a/