M4.5 Earthquake 177 km NW of Tobelo, Indonesia — July 15, 2021
2021-07-15 13:00:32 UTC (2021-07-15) · approx. 9:00 PM UTC+8 local
On July 15, 2021 at 13:00 UTC, a magnitude 4.5 shallow crustal earthquake struck 177 km NW of Tobelo, Indonesia, at a depth of 58.0 km and coordinates 2.7696°, 126.7891°.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 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
126.7891°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near Tobelo, Indonesia?
The magnitude 4.5 earthquake that struck 177 km NW of Tobelo, Indonesia on July 15, 2021 at 13:00 UTC had a depth of 58.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 2.7696°, 126.7891°, which is 177 km NW of Tobelo, Indonesia. View all earthquakes in Indonesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 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 4.5 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000em5h). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 15, 2021). M4.5 Earthquake 177 km NW of Tobelo, Indonesia — July 15, 2021. Retrieved September 17, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000em5h/