M5.1 Earthquake south of the Fiji Islands — July 28, 2026
2026-07-28 20:23:42 UTC (1 hour ago) · approx. 8:23 AM UTC+12 local
On July 28, 2026 at 20:23 UTC, a magnitude 5.1 deep-focus earthquake struck south of the Fiji Islands, at a depth of 575.1 km and coordinates -22.1845°, 179.5638°. This earthquake was detected by 71 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 400, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Fiji, a region characterized by the Fiji Fracture Zone at the junction of the Pacific and Australian plates, with deep-focus seismicity from the subducted slab. View all earthquakes in Fiji.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
179.5638°E
Technical Information
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Common Questions
How strong was the magnitude 5.1 earthquake south of the Fiji Islands?
The magnitude 5.1 earthquake that struck south of the Fiji Islands on July 28, 2026 at 20:23 UTC had a depth of 575.1 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -22.1845°, 179.5638°, which is south of the Fiji Islands. View all earthquakes in Fiji.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
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Location
Authoritative source: USGS event page (event ID: us6000tggi). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 28, 2026). M5.1 Earthquake south of the Fiji Islands — July 28, 2026. Retrieved July 28, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000tggi/