M4.3 Earthquake 45 km WSW of Mendi, Papua New Guinea — September 13, 2021
2021-09-13 16:54:25 UTC (2021-09-13) · approx. 2:54 AM UTC+10 local
On September 13, 2021 at 16:54 UTC, a magnitude 4.3 shallow crustal earthquake struck 45 km WSW of Mendi, Papua New Guinea, at a depth of 10.0 km and coordinates -6.2934°, 143.2742°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
143.2742°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake near Mendi, Papua New Guinea?
The magnitude 4.3 earthquake that struck 45 km WSW of Mendi, Papua New Guinea on September 13, 2021 at 16:54 UTC had a depth of 10.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000fc4v). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 13, 2021). M4.3 Earthquake 45 km WSW of Mendi, Papua New Guinea — September 13, 2021. Retrieved November 23, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000fc4v/