M4.6 Earthquake 165 km SE of Bitung, Indonesia — April 25, 2026
2026-04-25 17:40:24 UTC (1 hour ago) · approx. 1:40 AM UTC+8 local
Aftershock of the M5.0 mainshock.
On April 25, 2026 at 17:40 UTC, a magnitude 4.6 shallow crustal earthquake struck 165 km SE of Bitung, Indonesia, at a depth of 27.3 km and coordinates 0.2021°, 125.9627°. This earthquake was detected by 92 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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 7 days ago 144 km E of Modisi, Indonesia. Since the mainshock, the USGS has recorded 1 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
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
125.9627°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.6 earthquake near Bitung, Indonesia?
The magnitude 4.6 earthquake that struck 165 km SE of Bitung, Indonesia on April 25, 2026 at 17:40 UTC had a depth of 27.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 0.2021°, 125.9627°, which is 165 km SE of Bitung, 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.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.6 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 144 km E of Modisi, Indonesia. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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.
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: us6000ssuz). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 25, 2026). M4.6 Earthquake 165 km SE of Bitung, Indonesia — April 25, 2026. Retrieved April 25, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000ssuz/