M5.1 Earthquake 83 km N of Luwuk, Indonesia — January 21, 2026
2026-01-21 22:44:43 UTC (2026-01-21) · approx. 6:44 AM UTC+8 local
On January 21, 2026 at 22:44 UTC, a magnitude 5.1 intermediate depth earthquake struck 83 km N of Luwuk, Indonesia, at a depth of 88.0 km and coordinates -0.2053°, 122.6765°. This earthquake was detected by 148 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — 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
122.6765°E
Technical Information
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Common Questions
How strong was the magnitude 5.1 earthquake near Luwuk, Indonesia?
The magnitude 5.1 earthquake that struck 83 km N of Luwuk, Indonesia on January 21, 2026 at 22:44 UTC had a depth of 88.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -0.2053°, 122.6765°, which is 83 km N of Luwuk, Indonesia. View all earthquakes in Indonesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks 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 5.1 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: us7000rr7x). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, January 21, 2026). M5.1 Earthquake 83 km N of Luwuk, Indonesia — January 21, 2026. Retrieved May 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000rr7x/