M4.9 Earthquake 159 km ESE of Gizo, Solomon Islands — September 27, 2026
2026-09-27 04:59:48 UTC (1 hour ago) · approx. 3:59 PM UTC+11 local
Aftershock of the M5.1 mainshock.
On September 27, 2026 at 04:59 UTC, a magnitude 4.9 shallow crustal earthquake struck 159 km ESE of Gizo, Solomon Islands, at a depth of 10.0 km and coordinates -8.8929°, 158.0533°. This earthquake was detected by 23 seismic stations with good location accuracy and was assigned a USGS significance rating of 369, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — 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 5.1 mainshock that occurred 12 days ago 147 km SE of Gizo, Solomon Islands. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
158.0533°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Gizo, Solomon Islands?
The magnitude 4.9 earthquake that struck 159 km ESE of Gizo, Solomon Islands on September 27, 2026 at 04:59 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -8.8929°, 158.0533°, which is 159 km ESE of Gizo, Solomon Islands.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.1 one earlier?
No. This magnitude 4.9 earthquake is an aftershock of the larger magnitude 5.1 mainshock that occurred earlier 147 km SE of Gizo, Solomon Islands. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Authoritative source: USGS event page (event ID: us6000txwy). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, September 27, 2026). M4.9 Earthquake 159 km ESE of Gizo, Solomon Islands — September 27, 2026. Retrieved September 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000txwy/