M3.7 Earthquake 1 km S of Niederau, Austria — August 16, 2021
2021-08-16 21:15:39 UTC (2021-08-16) · approx. 10:15 PM UTC+1 local
Felt by 20 people across nearby locations.
On August 16, 2021 at 21:15 UTC, a magnitude 3.7 shallow crustal earthquake struck 1 km S of Niederau, Austria, at a depth of 10.0 km and coordinates 47.4326°, 12.0831°.
Physical scale: An earthquake of magnitude 3.7 releases seismic energy equivalent to roughly 5.4 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 215 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 20 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
12.0831°E
Technical Information
Common Questions
How strong was the magnitude 3.7 earthquake near Niederau, Austria?
The magnitude 3.7 earthquake that struck 1 km S of Niederau, Austria on August 16, 2021 at 21:15 UTC had a depth of 10.0 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 47.4326°, 12.0831°, which is 1 km S of Niederau, Austria.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.7 earthquakes can continue for several days and gradually diminish over time.
Authoritative source: USGS event page (event ID: us6000f784). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 16, 2021). M3.7 Earthquake 1 km S of Niederau, Austria — August 16, 2021. Retrieved December 11, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f784/