M4.6 Earthquake 221 km SSE of Amahai, Indonesia — June 29, 2021
2021-06-29 21:28:41 UTC (2021-06-29) · approx. 6:28 AM UTC+9 local
On June 29, 2021 at 21:28 UTC, a magnitude 4.6 intermediate depth earthquake struck 221 km SSE of Amahai, Indonesia, at a depth of 259.3 km and coordinates -5.2708°, 129.4352°.
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.
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
129.4352°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near Amahai, Indonesia?
The magnitude 4.6 earthquake that struck 221 km SSE of Amahai, Indonesia on June 29, 2021 at 21:28 UTC had a depth of 259.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -5.2708°, 129.4352°, which is 221 km SSE of Amahai, 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.
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.
Authoritative source: USGS event page (event ID: us6000eqy7). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, June 29, 2021). M4.6 Earthquake 221 km SSE of Amahai, Indonesia — June 29, 2021. Retrieved September 9, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000eqy7/