Earthquakes medium

M 4.2 Earthquake 92 km WNW of False Pass, Alaska

Source: USGS · Alaska

A magnitude 4.2 earthquake was recorded by USGS near 92 km WNW of False Pass. On the USGS Earthquake Hazards Program scale, M4.2 is classified "Light". Among the 1,720 earthquake reports Areazine has published, this M4.2 event ranks stronger than 49% of them (rank #853 by magnitude).

30 seconds on this earthquake report

Magnitude
M 4.2
USGS class
Light
Location
92 km WNW of False Pass
Archive rank
#853 of 1,720
Source
USGS
Published
August 31, 2026
LIGHT

Out of 1,720 earthquake reports Areazine has logged, this one outranks 49% of them — 852 recorded a higher magnitude.

Record status: USGS's reading at the moment of detection — the agency keeps revising magnitude, aftershock counts, and felt reports on its own event page as more data arrives.

What Happened

A magnitude 4.2 mb earthquake struck 92 km WNW of False Pass, Alaska, on August 1, 2026, at 12:36:53 UTC (timestamp 1788218213693). The event was recorded at coordinates 55.0626°N, 164.8095°W with a depth of 174.396 km.

Location Details

The earthquake was located 92 km west-northwest of False Pass, Alaska. The depth of 174 km places it in the deep category (>70 km).

Impact Assessment

No felt reports were recorded. The Modified Mercalli Intensity was reported as 1. No tsunami was generated (tsunami flag: 0) and no alert level was issued.

What You Should Know

This was classified as a light earthquake. Deep events at this magnitude are typically felt over a limited area and rarely cause damage.

Source

USGS Event Page

Original source: USGS Official Notice ↗

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Similar notices nationwide by length or severity timing 8

Beyond this USGS earthquake report's own category, Areazine surfaces two nationwide peer sets: length-matched and severity/date-matched notices from elsewhere in the archive, distinct from the same-feed Related list above.

Similar body length

Nearest notices by article body length (820 characters here).

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Similar severity timing

Same severity (medium) notices issued closest in time to August 31, 2026.

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Common Questions

Questions readers often have about this USGS earthquake report.

What magnitude was this earthquake? ▾
A magnitude 4.2 mb earthquake occurred 92 km WNW of False Pass, Alaska, at a depth of 174 km.
What does a magnitude 4.2 ("Light") earthquake mean? ▾
The USGS classifies M4.2 as "Light" on its Earthquake Hazards Program scale. Events in this range are often felt near the epicenter and can cause minor damage to vulnerable structures, though widespread damage is uncommon.
How does this compare with other earthquakes Areazine has reported? ▾
This is the #853 strongest of the 1,720 earthquake reports in Areazine's archive by magnitude, stronger than 49% of them and weaker than 852 others.
Was False Pass likely to feel this earthquake? ▾
This event was centered 92 km WNW of False Pass. Shaking intensity falls off sharply with distance from the epicenter and depends on depth and local geology, so check the USGS "Did You Feel It?" report for this event for real felt-shaking data rather than assuming from magnitude and distance alone.

Where this data comes from

EPA Outdoor Air Quality Data

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AirNow (EPA / NOAA)

Real-time AQI for every monitored U.S. location

National Weather Service

Active watches, warnings, and advisories, NOAA

CDC Air Quality & Health

Health-impact reference behind every AQI category