M4.6 earthquake 85 km SSE of False Pass, Alaska

Sunday, May 3, 2026, 19:20:09 UTC · 54.151°N, 162.895°W

A magnitude 4.6 earthquake struck 85 km SSE of False Pass, Alaska on Sunday, May 3, 2026, 19:20:09 UTC, at a depth of 41.3 km (shallow). USGS received 2 “Did You Feel It?” reports, with a maximum reported intensity of IV (light). It is the strongest earthquake within 300 km since an M5.5 on April 25, 2026.

Magnitude: 4.6; Light · mwr
Depth: 41 km; Shallow
Felt reports: 2; Max intensity IV
Est. shaking: IV; Light (ShakeMap)
PAGER alert: None; Not issued
Tsunami: No flag; USGS feed

Outlined circle: this earthquakeDashed circle: 50 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)

In context

How big was it, and why here?

Energy released

120 tons of TNT

That is about 1/126 of the Hiroshima bomb. A magnitude 5.0 releases about 4 times more energy.

Tectonic setting

92 km

from the nearest mapped plate boundary, between the North American and Pacific plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.

Depth: shallow

41 km

Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.

Did You Feel It?

Where it was felt

Reports sent by people to USGS, grouped by place (most reports first). Intensity uses the Modified Mercalli scale (I–X): what people felt, not the magnitude.

Place	Intensity	Reports	Distance
99612<br>0.330	IV · Light	1	151 km
99583<br>0.330	II · Weak	1	103 km

I felt it — report to USGS ↗

USGS PAGER estimate

Who was exposed to shaking

USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.

After the main event

Aftershocks within 50 km

USGS lists 15 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M4.7 on May 14, 2026. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.

Regional history

Past M5+ earthquakes within 300 km

USGS lists 439 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 11 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 169 recorded deaths. The most severe:

1946M8.6
Unimak Island
1 Apr 1946 · 73 km away · intensity VI
168 deaths$26 million damagetsunami
2023M7.2
Alaska Peninsula
16 Jul 2023 · 143 km away · intensity VI
1 deathtsunami
2020M7.8
Alaska
22 Jul 2020 · 295 km away · intensity VII
Limited damage (under $1M)tsunami
1788M8.0
Alaska Peninsula
6 Aug 1788 · 154 km away
tsunami
2020M7.6
Alaska
19 Oct 2020 · 218 km away · intensity IX
tsunami
1948M7.5
Alaska Peninsula
14 May 1948 · 129 km away

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

Nearby trackers