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M4.7 Earthquake near 234 km SSE of False Pass, Alaska

UTC time: 2026-09-20 21:06:23 UTC Local time: —
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First published: Content updated:

Automatically generated from measurement data by QuakeMap24. Values may change after further analysis.

Magnitude
M4.7
Depth
19.4 km
Source
USGS

234 km SSE of False Pass, Alaska

Map

About this earthquake

On September 20, 2026 at 21:06 UTC, a magnitude M4.7 earthquake occurred near 234 km SSE of False Pass, Alaska. The hypocenter lay relatively close to the surface at around 19 km, increasing how strongly it was felt. Earthquakes of this magnitude are clearly felt; minor damage to vulnerable buildings is possible.

The data is provided by USGS and cross-checked across seismological networks.

Details

ID
021a87d9e612b9deacba99ca3232b8d1ae75b016
Magnitude
M4.7
Depth
19.4 km
UTC time
2026-09-20 21:06:23 UTC
Local time
—
Country
—
Source
usgs
Coordinates
52.81200, -162.52400
Temperature
8.4°C

Depth profile

Depth profile Depth: 19.4 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 19.4 km
Shallow
19.4 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

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 4, 2026, 9:06 PM UTC · Last checked: Oct 5, 2026, 5:22 PM UTC

Updates are delayed. The last successfully retrieved data are shown.

Oct 4, 2026, 10:00 PM UTC – Oct 5, 2026, 10:00 PM UTC · Expired
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.01.77 %0–0
M ≥ 4.00.18 %0–0
M ≥ 5.00.02 %0–0
M ≥ 6.0< 0.01 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 4, 2026, 10:00 PM UTC – Oct 11, 2026, 10:00 PM UTC · Expired
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.09.56 %0–1
M ≥ 4.01.06 %0–0
M ≥ 5.00.11 %0–0
M ≥ 6.00.01 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 4, 2026, 10:00 PM UTC – Nov 3, 2026, 10:00 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.023.08 %0–2
M ≥ 4.03.02 %0–1
M ≥ 5.00.31 %0–0
M ≥ 6.00.03 %0–0
M ≥ 7.0< 0.01 %0–0
Oct 4, 2026, 10:00 PM UTC – Oct 4, 2027, 10:00 PM UTC
MagnitudeProbability ≥ 1Count (95% interval)
M ≥ 3.047.59 %0–5
M ≥ 4.08.85 %0–1
M ≥ 5.00.98 %0–0
M ≥ 6.00.10 %0–0
M ≥ 7.0< 0.01 %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

Ground shaking

II
Weak · Intensity (MMI) II
Felt by a few, no damage.

Tectonic context

Located on the Pacific Plate.
Near the boundary North America ↔ Pacific · about 68 km away

Volcanoes nearby

  • Roundtop
    Distance: 232 km ·Stratovolcano ·Elevation: 1'871 m ·Last eruption: -7600 ·United States
  • Westdahl
    Distance: 236 km ·Stratovolcano? ·Elevation: 1'563 m ·Last eruption: 1992 ·United States
  • Shishaldin ADVISORY · YELLOW
    Distance: 236 km ·Stratovolcano ·Elevation: 2'857 m ·Last eruption: 2023 ·United States
  • Fisher
    Distance: 240 km ·Stratovolcano ·Elevation: 1'112 m ·Last eruption: 1830 ·United States
  • Frosty
    Distance: 252 km ·Stratovolcano(es) ·Elevation: 1'728 m ·United States
  • Dutton
    Distance: 264 km ·Stratovolcano ·Elevation: 1'465 m ·United States

No unambiguous area assignment

Context for this earthquake

This event has no unambiguous country assignment in the analysed catalogue. It is therefore not assigned to a regional profile.

Earthquake overview

Stats (last 24h)

Global (24h)
599
Country (24h)
—
—
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