M4.1 Earthquake 35 km SSW of Mount Buller, Australia — September 21, 2021
2021-09-21 23:33:38 UTC (2021-09-21) · approx. 9:33 AM UTC+10 local
Felt by 70 people across nearby locations.
On September 21, 2021 at 23:33 UTC, a magnitude 4.1 shallow crustal earthquake struck 35 km SSW of Mount Buller, Australia, at a depth of 10.0 km and coordinates -37.4349°, 146.2528°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 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 70 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
146.2528°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near Mount Buller, Australia?
The magnitude 4.1 earthquake that struck 35 km SSW of Mount Buller, Australia on September 21, 2021 at 23:33 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 -37.4349°, 146.2528°, which is 35 km SSW of Mount Buller, Australia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000fdb0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 21, 2021). M4.1 Earthquake 35 km SSW of Mount Buller, Australia — September 21, 2021. Retrieved December 7, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fdb0/