M5.6 Earthquake 126 km WNW of Gizo, Solomon Islands — February 23, 2025
2025-02-23 01:31:52 UTC (2025-02-23) · approx. 11:31 AM UTC+10 local
Maximum shaking intensity MMI 4.2 (moderate).
On February 23, 2025 at 01:31 UTC, a magnitude 5.6 shallow crustal earthquake struck 126 km WNW of Gizo, Solomon Islands, at a depth of 35.0 km and coordinates -7.4856°, 155.8717°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 101 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 482, placing it among routine seismic activity. The nearest populated place is Panguna (population 2,916).
Physical scale: An earthquake of magnitude 5.6 releases seismic energy equivalent to roughly 4 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 4.4 km — a useful intuition for the size of the slip patch on the fault.
Nearest Populated Places
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 257,296 |
| MMI 4 | light | 71,972 |
Earthquake Details
155.8717°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.6 earthquake near Gizo, Solomon Islands?
The magnitude 5.6 earthquake that struck 126 km WNW of Gizo, Solomon Islands on February 23, 2025 at 01:31 UTC had a depth of 35.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -7.4856°, 155.8717°, which is 126 km WNW of Gizo, Solomon Islands. The nearest populated place is Panguna (population 2,916).
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.6 earthquakes can continue for days to weeks and gradually diminish over time.
Authoritative source: USGS event page (event ID: us7000pfjc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2025, February 23, 2025). M5.6 Earthquake 126 km WNW of Gizo, Solomon Islands — February 23, 2025. Retrieved May 6, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000pfjc/