M4.0 Earthquake 185 km S of Ambon, Indonesia — June 30, 2025
2025-06-30 19:00:45 UTC (2025-06-30) · approx. 4:00 AM UTC+9 local
On June 30, 2025 at 19:00 UTC, a magnitude 4.0 deep-focus earthquake struck 185 km S of Ambon, Indonesia, at a depth of 321.1 km and coordinates -5.3549°, 128.4253°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
128.4253°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Ambon, Indonesia?
The magnitude 4.0 earthquake that struck 185 km S of Ambon, Indonesia on June 30, 2025 at 19:00 UTC had a depth of 321.1 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 4.0 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000q9ud). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, June 30, 2025). M4.0 Earthquake 185 km S of Ambon, Indonesia — June 30, 2025. Retrieved September 4, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000q9ud/