M4.3 Earthquake 74 km ENE of Kainantu, Papua New Guinea — July 21, 2023
2023-07-21 21:38:11 UTC (2023-07-21) · approx. 7:38 AM UTC+10 local
On July 21, 2023 at 21:38 UTC, a magnitude 4.3 intermediate depth earthquake struck 74 km ENE of Kainantu, Papua New Guinea, at a depth of 92.4 km and coordinates -5.9149°, 146.4272°.
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
146.4272°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Kainantu, Papua New Guinea?
The magnitude 4.3 earthquake that struck 74 km ENE of Kainantu, Papua New Guinea on July 21, 2023 at 21:38 UTC had a depth of 92.4 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.
Actions
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000kw8i). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 21, 2023). M4.3 Earthquake 74 km ENE of Kainantu, Papua New Guinea — July 21, 2023. Retrieved September 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kw8i/