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United States · Alaska

M5.5 Earthquake near Kenai Peninsula Borough, Alaska (United States)

UTC time: 2026-10-06 18:34:31 UTC Local time: —
Magnitude
M5.5
Depth
87.5 km
Source
USGS

Alaska · Kenai Peninsula Borough

Country overview

Map

M5.5 Earthquake near Kenai Peninsula Borough, Alaska (United States) · 2026-10-06 — Map showing the location of the epicenter
M5.5 Earthquake near Kenai Peninsula Borough, Alaska (United States) · 2026-10-06 — Map showing the location of the epicenter

About this earthquake

On October 6, 2026 at 18:34 UTC, a magnitude M5.5 earthquake occurred near Kenai Peninsula Borough, Alaska (United States). At around 88 km, the focal depth places this among intermediate-depth events. Events of this size can cause damage near the epicenter.

The data is provided by USGS and cross-checked across seismological networks. United States: over the past 24 hours, QuakeMap24 logged 160 earthquakes, the strongest at M5.8.

Depth profile

Depth profile Depth: 87.5 km (Intermediate) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 87.5 km
Intermediate
87.5 km
87.5 km — deeper than the regional average (15.2 km)
Regional average: 15.2 km
Why depth matters

Intermediate-depth quakes are felt across a wider area but usually cause less surface damage.

Depth classes per USGS

Official USGS aftershock forecast

Probability of at least one aftershock at or above the specified magnitude during the entire stated time window. This does not predict an individual earthquake.

Issued: Oct 6, 2026, 7:24 PM UTC · Last checked: Oct 6, 2026, 7:45 PM UTC

Oct 6, 2026, 7:30 PM UTC – Oct 7, 2026, 7:30 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.076.54 %0–71
M ≥ 4.034.88 %0–8
M ≥ 5.07.72 %0–1
M ≥ 6.00.95 %0–0
M ≥ 7.00.10 %0–0
Oct 6, 2026, 7:30 PM UTC – Oct 13, 2026, 7:30 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.085.00 %0–132
M ≥ 4.046.22 %0–14
M ≥ 5.012.47 %0–2
M ≥ 6.01.73 %0–0
M ≥ 7.00.18 %0–0
Oct 6, 2026, 7:30 PM UTC – Nov 5, 2026, 7:30 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.088.87 %0–190
M ≥ 4.053.06 %0–19
M ≥ 5.016.05 %0–2
M ≥ 6.02.43 %0–0
M ≥ 7.00.26 %0–0
Oct 6, 2026, 7:30 PM UTC – Oct 6, 2027, 7:30 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.093.09 %0–314
M ≥ 4.062.64 %0–32
M ≥ 5.022.25 %0–4
M ≥ 6.03.85 %0–1
M ≥ 7.00.43 %0–0

The range is the 95% forecast interval for the number of earthquakes. Magnitude thresholds and time windows overlap: do not add the values. Windows already in progress still refer to the entire stated period.

Source: USGS — Operational Aftershock Forecast

Estimated impact

Green No or minimal impact expected.
305 Felt reports · max reported intensity 4.6

Ground shaking

IV
Light · Intensity (MMI) IV
Felt by many, no damage.

Tectonic context

Located on the North America Plate.
Near the boundary North America ↔ Pacific · about 313 km away

Nearby population centers

Distances are straight-line distances from the epicenter. Population data: GeoNames.

PlaceDistanceDirectionPopulation
Anchorage340.2 kmNE289'600

GeoNames · CC BY 4.0

Volcanoes nearby

  • Fourpeaked
    Distance: 4 km ·Stratovolcano ·Elevation: 2'105 m ·Last eruption: 2006 ·United States
  • Douglas
    Distance: 9 km ·Stratovolcano ·Elevation: 2'140 m ·United States
  • Kaguyak
    Distance: 30 km ·Lava dome(s) ·Elevation: 901 m ·Last eruption: -3850 ·United States
  • Kukak
    Distance: 56 km ·Stratovolcano ·Elevation: 2'043 m ·United States
  • Steller
    Distance: 59 km ·Stratovolcano ·Elevation: 2'279 m ·United States
  • Denison
    Distance: 63 km ·Stratovolcano ·Elevation: 2'287 m ·United States

Radius · 100 km

Nearby infrastructure

Up to 3 nearest sites per category

Airports

  • Kokhanok AirportUnited States · KNK · PFKK
    95.6 kmStraight-line distance

Source: OurAirports · Dataset date: 2026-10-05

This selection shows geographic proximity, not a hazard zone or confirmed impacts. Distances use recorded site coordinates. Sources & data dates

Comparison of seismic sources

5 sources currently report magnitudes from M5.5 to M5.8.

Measurements can differ because agencies use different networks and calculation methods. Values may be revised.

SourceMagnitudeDepthPosition difference
GFZM5.810.0 km31.7 km
SERBIA_RSZM5.510.0 km49.6 km
EMSCM5.889.3 km1.4 km
RESIFM5.660.4 km26.2 km
USGSM5.587.5 km0.0 km

Alaska

Context for this earthquake

05 Oct 2025 – 05 Oct 2026 · M ≥ 3.0 · 653 Catalogue entries

Sufficiently reliable matching data are not currently available for a direct comparison. The area profile shows the available records and their limitations.

Open seismic profile

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#1
Earlier events M≥423
Earlier events M≥50
Compared since2025-03-06

The QuakeMap24 comparison dataset begins on 2024-03-23. Earlier earthquakes may not be included.

Strongest earlier events

M4.82025-10-02 07:13:50 UTC148.3 kmAlaska Peninsula M4.82025-07-05 18:15:05 UTC147.2 kmSouthern Alaska M4.62025-04-25 19:17:02 UTC88.1 km8 km WNW of Aleneva, Alaska M4.62025-04-24 15:14:16 UTC148.4 km65 km ENE of Ouzinkie, Alaska M4.52026-04-23 07:12:56 UTC126.4 kmKodiak Island Borough

Historic earthquake map · United States

Open history map
Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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