M4.2 Earthquake 177 km ENE of Bontang, Indonesia — July 26, 2025
2025-07-26 18:29:16 UTC (2025-07-26) · approx. 2:29 AM UTC+8 local
On July 26, 2025 at 18:29 UTC, a magnitude 4.2 shallow crustal earthquake struck 177 km ENE of Bontang, Indonesia, at a depth of 10.0 km and coordinates 0.5970°, 119.0077°.
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.
Earthquake Details
119.0077°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Bontang, Indonesia?
The magnitude 4.2 earthquake that struck 177 km ENE of Bontang, Indonesia on July 26, 2025 at 18:29 UTC had a depth of 10.0 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.
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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: us6000qz3r). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, July 26, 2025). M4.2 Earthquake 177 km ENE of Bontang, Indonesia — July 26, 2025. Retrieved October 11, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000qz3r/