M4.3 Earthquake 38 km NW of Poso, Indonesia — May 28, 2023
2023-05-28 21:05:27 UTC (2023-05-28) · approx. 5:05 AM UTC+8 local
On May 28, 2023 at 21:05 UTC, a magnitude 4.3 shallow crustal earthquake struck 38 km NW of Poso, Indonesia, at a depth of 40.9 km and coordinates -1.1166°, 120.5444°.
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
120.5444°E
Technical Information
Common Questions
How strong was the magnitude 4.3 earthquake near Poso, Indonesia?
The magnitude 4.3 earthquake that struck 38 km NW of Poso, Indonesia on May 28, 2023 at 21:05 UTC had a depth of 40.9 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: us7000k5tp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, May 28, 2023). M4.3 Earthquake 38 km NW of Poso, Indonesia — May 28, 2023. Retrieved August 5, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000k5tp/