M4.6 Earthquake 122 km NW of Luwuk, Indonesia — August 15, 2026
2026-08-15 09:51:45 UTC (1 hour ago) · approx. 5:51 PM UTC+8 local
On August 15, 2026 at 09:51 UTC, a magnitude 4.6 intermediate depth earthquake struck 122 km NW of Luwuk, Indonesia, at a depth of 272.8 km and coordinates -0.1583°, 122.0236°. This earthquake was detected by 39 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 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
122.0236°E
Technical Information
Common Questions
How strong was the magnitude 4.6 earthquake near Luwuk, Indonesia?
The magnitude 4.6 earthquake that struck 122 km NW of Luwuk, Indonesia on August 15, 2026 at 09:51 UTC had a depth of 272.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -0.1583°, 122.0236°, which is 122 km NW of Luwuk, Indonesia. View all earthquakes in Indonesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 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 4.6 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000tkya). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 15, 2026). M4.6 Earthquake 122 km NW of Luwuk, Indonesia — August 15, 2026. Retrieved August 15, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tkya/