M4.1 Earthquake 45 km NNW of Te Anau, New Zealand — March 13, 2021
2021-03-13 21:04:04 UTC (2021-03-13) · approx. 8:04 AM UTC+11 local
On March 13, 2021 at 21:04 UTC, a magnitude 4.1 intermediate depth earthquake struck 45 km NNW of Te Anau, New Zealand, at a depth of 85.7 km and coordinates -45.0355°, 167.4997°.
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 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
167.4997°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near Te Anau, New Zealand?
The magnitude 4.1 earthquake that struck 45 km NNW of Te Anau, New Zealand on March 13, 2021 at 21:04 UTC had a depth of 85.7 km. For context, this was a light earthquake commonly felt near the epicenter.
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.
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Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000dj5f). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, March 13, 2021). M4.1 Earthquake 45 km NNW of Te Anau, New Zealand — March 13, 2021. Retrieved May 26, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000dj5f/