M4.4 Earthquake 46 km NE of Tobelo, Indonesia — July 18, 2021
2021-07-18 21:55:33 UTC (2021-07-18) · approx. 6:55 AM UTC+9 local
On July 18, 2021 at 21:55 UTC, a magnitude 4.4 shallow crustal earthquake struck 46 km NE of Tobelo, Indonesia, at a depth of 51.5 km and coordinates 1.9966°, 128.3354°.
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
128.3354°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Tobelo, Indonesia?
The magnitude 4.4 earthquake that struck 46 km NE of Tobelo, Indonesia on July 18, 2021 at 21:55 UTC had a depth of 51.5 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: us6000eybb). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, July 18, 2021). M4.4 Earthquake 46 km NE of Tobelo, Indonesia — July 18, 2021. Retrieved September 25, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000eybb/