M4.2 Earthquake 296 km WNW of Haveluloto, Tonga — July 19, 2020
2020-07-19 23:07:16 UTC (2020-07-19) · approx. 11:07 AM UTC-12 local
On July 19, 2020 at 23:07 UTC, a magnitude 4.2 deep-focus earthquake struck 296 km WNW of Haveluloto, Tonga, at a depth of 539.5 km and coordinates -20.4765°, -177.9697°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-177.9697°E
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Common Questions
How strong was the magnitude 4.2 earthquake near Haveluloto, Tonga?
The magnitude 4.2 earthquake that struck 296 km WNW of Haveluloto, Tonga on July 19, 2020 at 23:07 UTC had a depth of 539.5 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000b3gv). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 19, 2020). M4.2 Earthquake 296 km WNW of Haveluloto, Tonga — July 19, 2020. Retrieved September 26, 2020 from https://www.earthquaketracker.org/earthquakes/event/us6000b3gv/