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M 3.9 Earthquake 44 km W of Happy Valley, Alaska

Source: USGS · Alaska

A magnitude 3.9 earthquake was recorded by USGS near 44 km W of Happy Valley. On the USGS Earthquake Hazards Program scale, M3.9 is classified "Minor". Among the 1,740 earthquake reports Areazine has published, this M3.9 event ranks stronger than 44% of them (rank #943 by magnitude).

This earthquake report, quickly

Magnitude
M 3.9
USGS class
Minor
Location
44 km W of Happy Valley
Archive rank
#943 of 1,740
Source
USGS
Published
August 3, 2026
MINOR

Out of 1,740 earthquake reports Areazine has logged, this one outranks 44% of them — 942 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 M 3.9 ml earthquake struck 44 km W of Happy Valley, Alaska, on 2026-07-05 at 12:16:22 UTC. The event was recorded at coordinates 60.022°N, -152.523°E with a depth of 108.3 km.

Location Details

The earthquake was located 44 km west of Happy Valley, Alaska. The depth of 108.3 km classifies it as a deep earthquake (>70 km).

Impact Assessment

The earthquake was felt by 63 people, with a maximum reported intensity (CDI) of 3.1. No tsunami was generated (tsunami advisory status: 0). No alert level was issued.

What You Should Know

Earthquakes of this magnitude (M 2.5-3.9) are often felt but rarely cause damage. Residents in the area should be prepared for possible aftershocks.

Source

USGS Event Page

Original source: USGS Official Notice ↗

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Common Questions

What people usually ask about a notice like this one.

What magnitude was this earthquake? ▾
A magnitude 3.9 ml earthquake occurred 44 km west of Happy Valley, Alaska, at a depth of 108.3 km.
How should a magnitude 3.9 ("Minor") event be understood? ▾
The USGS classifies M3.9 as "Minor" 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 #943 strongest of the 1,740 earthquake reports in Areazine's archive by magnitude, stronger than 44% of them and weaker than 942 others.
Was Happy Valley likely to feel this earthquake? ▾
This event was centered 44 km W of Happy Valley. 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.

Source data

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AirNow (EPA / NOAA)

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National Weather Service

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CDC Air Quality & Health

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