M6.6 Earthquake 195 km NW of Port-Olry, Vanuatu — October 20, 2026
2026-10-20 04:20:37 UTC (4 hours ago) · approx. 3:20 PM UTC+11 local
On October 20, 2026 at 04:20 UTC, a magnitude 6.6 shallow crustal earthquake struck 195 km NW of Port-Olry, Vanuatu, at a depth of 10.0 km and coordinates -13.8690°, 165.7130°. This earthquake was detected by 13 seismic stations with good location accuracy and was assigned a USGS significance rating of 670, making it a moderate-impact event.
Physical scale: An earthquake of magnitude 6.6 releases seismic energy equivalent to roughly 120 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 22 km — a useful intuition for the size of the slip patch on the fault.
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
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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from submitted citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
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 | 32 |
| MMI 4 | light | 3,524 |
Earthquake Details
165.7130°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 6.6 earthquake near Port-Olry, Vanuatu?
The magnitude 6.6 earthquake that struck 195 km NW of Port-Olry, Vanuatu on October 20, 2026 at 04:20 UTC had a depth of 10.0 km. For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at -13.8690°, 165.7130°, which is 195 km NW of Port-Olry, Vanuatu. View all earthquakes in Vanuatu.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.6 earthquakes can continue for weeks to months and gradually diminish over time.
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 6.6 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: pt26293000). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 20, 2026). M6.6 Earthquake 195 km NW of Port-Olry, Vanuatu — October 20, 2026. Retrieved October 20, 2026 from https://www.earthquaketracker.org/earthquakes/event/pt26293000/