M4.2 Earthquake 178 km NE of Lospalos, Timor Leste — March 17, 2026
2026-03-17 23:15:58 UTC (2026-03-17) · approx. 8:15 AM UTC+9 local
On March 17, 2026 at 23:15 UTC, a magnitude 4.2 intermediate depth earthquake struck 178 km NE of Lospalos, Timor Leste, at a depth of 148.3 km and coordinates -7.4979°, 128.2502°.
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 5.1 mainshock that occurred 29 days ago 202 km NE of Lospalos, Timor Leste. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
128.2502°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Lospalos, Timor Leste?
The magnitude 4.2 earthquake that struck 178 km NE of Lospalos, Timor Leste on March 17, 2026 at 23:15 UTC had a depth of 148.3 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 M5.1 one earlier?
No. This magnitude 4.2 earthquake is an aftershock of the larger magnitude 5.1 mainshock that occurred earlier 202 km NE of Lospalos, Timor Leste. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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.
Actions
Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000sh1v). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, March 17, 2026). M4.2 Earthquake 178 km NE of Lospalos, Timor Leste — March 17, 2026. Retrieved May 26, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sh1v/