M4.3 Earthquake southeast of the Loyalty Islands — October 13, 2023
2023-10-13 20:05:04 UTC (2023-10-13) · approx. 7:05 AM UTC+11 local
On October 13, 2023 at 20:05 UTC, a magnitude 4.3 intermediate depth earthquake struck southeast of the Loyalty Islands, at a depth of 108.4 km and coordinates -22.3402°, 171.6267°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
171.6267°E
Technical Information
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Common Questions
How strong was the magnitude 4.3 earthquake southeast of the Loyalty Islands?
The magnitude 4.3 earthquake that struck southeast of the Loyalty Islands on October 13, 2023 at 20:05 UTC had a depth of 108.4 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000lgkp). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 13, 2023). M4.3 Earthquake southeast of the Loyalty Islands — October 13, 2023. Retrieved December 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000lgkp/