M4.9 Earthquake 29 km E of Hefei, China — September 18, 2024
2024-09-18 12:08:15 UTC (2024-09-18) · approx. 8:08 PM UTC+8 local
Felt by 35 people across nearby locations.
On September 18, 2024 at 12:08 UTC, a magnitude 4.9 shallow crustal earthquake struck 29 km E of Hefei, China, at a depth of 10.0 km and coordinates 31.9045°, 117.5888°. This earthquake was detected by 62 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 386, placing it among routine seismic activity.
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 35 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
117.5888°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Hefei, China?
The magnitude 4.9 earthquake that struck 29 km E of Hefei, China on September 18, 2024 at 12:08 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 31.9045°, 117.5888°, which is 29 km E of Hefei, China.
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.
Actions
Location
Authoritative source: USGS event page (event ID: us6000nsvh). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 18, 2024). M4.9 Earthquake 29 km E of Hefei, China — September 18, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nsvh/