M4.3 Earthquake 111 km E of Kimbe, Papua New Guinea — August 9, 2021
2021-08-09 21:09:00 UTC (2021-08-09) · approx. 7:09 AM UTC+10 local
On August 9, 2021 at 21:09 UTC, a magnitude 4.3 intermediate depth earthquake struck 111 km E of Kimbe, Papua New Guinea, at a depth of 78.1 km and coordinates -5.3645°, 151.1272°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.2 mainshock that occurred 4 hours ago 139 km SW of Kokopo, Papua New Guinea. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
151.1272°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Kimbe, Papua New Guinea?
The magnitude 4.3 earthquake that struck 111 km E of Kimbe, Papua New Guinea on August 9, 2021 at 21:09 UTC had a depth of 78.1 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.
Is this the same earthquake as the M5.2 one earlier?
No. This magnitude 4.3 earthquake is an aftershock of the larger magnitude 5.2 mainshock that occurred earlier 139 km SW of Kokopo, Papua New Guinea. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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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: us6000f7zn). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, August 9, 2021). M4.3 Earthquake 111 km E of Kimbe, Papua New Guinea — August 9, 2021. Retrieved October 23, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000f7zn/