M4.4 Earthquake 223 km NNW of Tobelo, Indonesia — September 20, 2023
2023-09-20 23:25:14 UTC (2023-09-20) · approx. 7:25 AM UTC+8 local
On September 20, 2023 at 23:25 UTC, a magnitude 4.4 shallow crustal earthquake struck 223 km NNW of Tobelo, Indonesia, at a depth of 35.0 km and coordinates 3.4693°, 126.9877°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
126.9877°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Tobelo, Indonesia?
The magnitude 4.4 earthquake that struck 223 km NNW of Tobelo, Indonesia on September 20, 2023 at 23:25 UTC had a depth of 35.0 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ky63). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 20, 2023). M4.4 Earthquake 223 km NNW of Tobelo, Indonesia — September 20, 2023. Retrieved January 18, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ky63/