M4.1 Earthquake 74 km WSW of Aitape, Papua New Guinea — August 29, 2021
2021-08-29 23:08:39 UTC (2021-08-29) · approx. 8:08 AM UTC+9 local
On August 29, 2021 at 23:08 UTC, a magnitude 4.1 shallow crustal earthquake struck 74 km WSW of Aitape, Papua New Guinea, at a depth of 35.0 km and coordinates -3.4268°, 141.7392°.
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.
Earthquake Details
141.7392°E
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Common Questions
How strong was the magnitude 4.1 earthquake near Aitape, Papua New Guinea?
The magnitude 4.1 earthquake that struck 74 km WSW of Aitape, Papua New Guinea on August 29, 2021 at 23:08 UTC had a depth of 35.0 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: us7000f8ye). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 29, 2021). M4.1 Earthquake 74 km WSW of Aitape, Papua New Guinea — August 29, 2021. Retrieved November 6, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000f8ye/