M4.9 Earthquake 127 km WNW of Hovd, Mongolia — September 23, 2021
2021-09-23 00:03:42 UTC (2021-09-23) · approx. 7:03 AM UTC+7 local
Felt by 1 person across nearby locations.
On September 23, 2021 at 00:03 UTC, a magnitude 4.9 shallow crustal earthquake struck 127 km WNW of Hovd, Mongolia, at a depth of 10.0 km and coordinates 44.9494°, 100.6053°.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — 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 1 citizen response 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
100.6053°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Hovd, Mongolia?
The magnitude 4.9 earthquake that struck 127 km WNW of Hovd, Mongolia on September 23, 2021 at 00:03 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 44.9494°, 100.6053°, which is 127 km WNW of Hovd, Mongolia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000fdnl). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 23, 2021). M4.9 Earthquake 127 km WNW of Hovd, Mongolia — September 23, 2021. Retrieved December 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fdnl/