M4.2 Earthquake 7 km SE of Kabanjahe, Indonesia — August 25, 2026
2026-08-25 00:27:17 UTC (2026-08-25) · approx. 7:27 AM UTC+7 local
On August 25, 2026 at 00:27 UTC, a magnitude 4.2 intermediate depth earthquake struck 7 km SE of Kabanjahe, Indonesia, at a depth of 153.9 km and coordinates 3.0555°, 98.5419°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 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 6.9 mainshock that occurred 28 days ago 9 km WNW of Pematangsiantar, Indonesia. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for weeks to months as stresses on surrounding faults redistribute.
Earthquake Details
98.5419°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Kabanjahe, Indonesia?
The magnitude 4.2 earthquake that struck 7 km SE of Kabanjahe, Indonesia on August 25, 2026 at 00:27 UTC had a depth of 153.9 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 4.2 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M6.9 one earlier?
No. This magnitude 4.2 earthquake is an aftershock of the larger magnitude 6.9 mainshock that occurred earlier 9 km WNW of Pematangsiantar, Indonesia. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000tdd3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, August 25, 2026). M4.2 Earthquake 7 km SE of Kabanjahe, Indonesia — August 25, 2026. Retrieved September 1, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000tdd3/