M4.2 Earthquake 65 km E of Luganville, Vanuatu — July 3, 2020
2020-07-03 23:09:33 UTC (2020-07-03) · approx. 10:09 AM UTC+11 local
On July 3, 2020 at 23:09 UTC, a magnitude 4.2 intermediate depth earthquake struck 65 km E of Luganville, Vanuatu, at a depth of 128.1 km and coordinates -15.5090°, 167.7693°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.4 mainshock that occurred 2 days ago 99 km NE of Norsup, Vanuatu. Since the mainshock, the USGS has recorded 1 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
167.7693°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.2 earthquake near Luganville, Vanuatu?
The magnitude 4.2 earthquake that struck 65 km E of Luganville, Vanuatu on July 3, 2020 at 23:09 UTC had a depth of 128.1 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.
Is this the same earthquake as the M5.4 one earlier?
No. This magnitude 4.2 earthquake is an aftershock of the larger magnitude 5.4 mainshock that occurred earlier 99 km NE of Norsup, Vanuatu. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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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: us7000akr6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 3, 2020). M4.2 Earthquake 65 km E of Luganville, Vanuatu — July 3, 2020. Retrieved September 11, 2020 from https://www.earthquaketracker.org/earthquakes/event/us7000akr6/