M4.5 Earthquake 100 km W of Abepura, Indonesia — October 28, 2025
2025-10-28 21:57:28 UTC (2025-10-28) · approx. 6:57 AM UTC+9 local
On October 28, 2025 at 21:57 UTC, a magnitude 4.5 shallow crustal earthquake struck 100 km W of Abepura, Indonesia, at a depth of 35.6 km and coordinates -2.6825°, 139.7299°. This earthquake was detected by 40 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Indonesia, a region characterized by the convergence of the Indo-Australian, Eurasian, and Philippine Sea plates, forming the Sunda-Banda arc system. The nearest mapped fault system is the Sunda megathrust. View all earthquakes in Indonesia.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
139.7299°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Abepura, Indonesia?
The magnitude 4.5 earthquake that struck 100 km W of Abepura, Indonesia on October 28, 2025 at 21:57 UTC had a depth of 35.6 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -2.6825°, 139.7299°, which is 100 km W of Abepura, Indonesia. View all earthquakes in Indonesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Has Indonesia had earthquakes this big before?
The largest recorded earthquake in Indonesia was the M9.1 Indian Ocean earthquake of December 26, 2004. Today's magnitude 4.5 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us6000rk2a). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, October 28, 2025). M4.5 Earthquake 100 km W of Abepura, Indonesia — October 28, 2025. Retrieved May 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000rk2a/