M5.5 Depth: 0.2 km

M5.5 Earthquake near Matanuska-Susitna Borough, Alaska (United States)

UTC time: 2026-08-08 04:50:33 UTC Local time:
M5.5 earthquake near Matanuska-Susitna Borough on Aug 8, 2026 — map of epicenter and shaking intensity | QuakeMap24
M5.5 Earthquake near Matanuska-Susitna Borough, Alaska (United States) · 2026-08-08 04:50:33 UTC

About this earthquake

On August 8, 2026 at 04:50 UTC, a magnitude M5.5 earthquake occurred near Matanuska-Susitna Borough, Alaska (United States). With a focal depth of about 0 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. 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 197 earthquakes, the strongest at M5.5.

Map

Depth profile

Depth profile Depth: 0.2 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 0.2 km
Shallow
0.2 km
0.2 km — shallower than the regional average (15.5 km)
Regional average: 15.5 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Estimated impact

1'055 Felt reports · max reported intensity 5.4

Ground shaking

VI
Strong · Intensity (MMI) VI
Strongly felt, light building damage possible.

Tectonic context

Located on the North America Plate.
Near the boundary North America ↔ Pacific · about 490 km away

Nearby population centers

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

PlaceDistanceDirectionPopulation
Anchorage174.9 kmSE289'600

GeoNames · CC BY 4.0

Volcanoes nearby

  • Hayes
    Distance: 70 km ·Stratovolcano ·Elevation: 3'034 m ·Last eruption: 1200 ·United States
  • Spurr
    Distance: 108 km ·Stratovolcano ·Elevation: 3'374 m ·Last eruption: 1992 ·United States
  • Redoubt
    Distance: 199 km ·Stratovolcano ·Elevation: 3'108 m ·Last eruption: 2009 ·United States
  • Iliamna
    Distance: 252 km ·Stratovolcano ·Elevation: 3'053 m ·Last eruption: 1876 ·United States
  • Buzzard Creek
    Distance: 281 km ·Tuff ring(s) ·Elevation: 830 m ·Last eruption: -1050 ·United States
  • Augustine
    Distance: 328 km ·Lava dome(s) ·Elevation: 1'218 m ·Last eruption: 2006 ·United States

Subsequent earthquakes nearby

Events recorded after this earthquake within 150 km. They are not automatically classified as aftershocks.

First 6 hours6
First 24 hours6
First 72 hours6
Strongest subsequent eventM2.4

Comparison of seismic sources

5 sources currently report magnitudes from M5.1 to M5.5.

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

SourceMagnitudeDepthPosition difference
USGSM5.50.2 km0.0 km
EMSCM5.55.0 km5.6 km
GFZM5.510.0 km16.0 km
SERBIA_RSZM5.410.0 km21.8 km
RESIFM5.110.0 km19.8 km

Historical context nearby

Comparison with recorded earthquakes before this event within 150 km.

Magnitude rank#7
Earlier events M≥436
Earlier events M≥514
Compared since2025-02-05

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

Strongest earlier events

Historic earthquake map · United States

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

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

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