M5.4 Earthquake 99 km NE of Norsup, Vanuatu — October 9, 2026
2026-10-09 13:51:42 UTC (1 hour ago) · approx. 12:51 AM UTC+11 local
Maximum shaking intensity MMI 6.0 (strong). Aftershock of the M6.3 mainshock.
On October 9, 2026 at 13:51 UTC, a magnitude 5.4 shallow crustal earthquake struck 99 km NE of Norsup, Vanuatu, at a depth of 10.0 km and coordinates -15.5361°, 168.1451°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. This earthquake was detected by 75 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 449, placing it among routine seismic activity. The nearest populated place is Norsup (population 2,998).
Physical scale: An earthquake of magnitude 5.4 releases seismic energy equivalent to roughly 2 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 3.2 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 6.3 mainshock that occurred 1 day ago 102 km NE of Norsup, Vanuatu. Since the mainshock, the USGS has recorded 1 aftershocks in this area. Aftershock activity is expected to continue for weeks to months as stresses on surrounding faults redistribute.
The epicenter is located in Vanuatu, a region characterized by the New Hebrides subduction zone, where the Australian Plate subducts eastward at approximately 90 mm per year. View all earthquakes in Vanuatu.
Learn more: Magnitude scale · Aftershock sequences
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 | 46,126 |
| MMI 4 | light | 28,137 |
| MMI 5 | moderate | 7,277 |
| MMI 6 | strong | 1,643 |
Earthquake Details
168.1451°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.4 earthquake near Norsup, Vanuatu?
The magnitude 5.4 earthquake that struck 99 km NE of Norsup, Vanuatu on October 9, 2026 at 13:51 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -15.5361°, 168.1451°, which is 99 km NE of Norsup, Vanuatu. The nearest populated place is Norsup (population 2,998). View all earthquakes in Vanuatu.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.4 earthquakes can continue for days to weeks and gradually diminish over time.
Is this the same earthquake as the M6.3 one earlier?
No. This magnitude 5.4 earthquake is an aftershock of the larger magnitude 6.3 mainshock that occurred earlier 102 km NE of Norsup, Vanuatu. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Has Vanuatu had earthquakes this big before?
The largest recorded earthquake in Vanuatu was the M7.9 Vanuatu earthquake of October 7, 2009. Today's magnitude 5.4 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000u15x). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 9, 2026). M5.4 Earthquake 99 km NE of Norsup, Vanuatu — October 9, 2026. Retrieved October 9, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000u15x/