M4.2 Earthquake southeast of the Loyalty Islands — September 21, 2024
2024-09-21 20:07:23 UTC (2024-09-21) · approx. 7:07 AM UTC+11 local
On September 21, 2024 at 20:07 UTC, a magnitude 4.2 intermediate depth earthquake struck southeast of the Loyalty Islands, at a depth of 115.5 km and coordinates -21.9431°, 171.1268°.
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
171.1268°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake southeast of the Loyalty Islands?
The magnitude 4.2 earthquake that struck southeast of the Loyalty Islands on September 21, 2024 at 20:07 UTC had a depth of 115.5 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: us7000ng6q). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, September 21, 2024). M4.2 Earthquake southeast of the Loyalty Islands — September 21, 2024. Retrieved November 23, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000ng6q/