M4.3 earthquake 93 km SE of False Pass, Alaska

Tuesday, July 14, 2026, 16:28:40 UTC · 54.167°N, 162.581°W

A magnitude 4.3 earthquake struck 93 km SE of False Pass, Alaska on Tuesday, July 14, 2026, 16:28:40 UTC, at a depth of 42.3 km (shallow). USGS received 2 “Did You Feel It?” reports, with a maximum reported intensity of III (weak). The USGS PAGER alert is green: low likelihood of casualties and damage.

Magnitude: 4.3; Light · mb
Depth: 42 km; Shallow
Felt reports: 2; Max intensity III
Est. shaking: III; Weak (ShakeMap)
PAGER alert: Green; Impact estimate
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

43 tons of TNT

That is about 1/354 of the Hiroshima bomb. A magnitude 5.0 releases about 11 times more energy.

Tectonic setting

88 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

42 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	III · Weak	1	145 km
99661<br>0.330	II · Weak	1	181 km

I felt it — report to USGS ↗

USGS PAGER estimate

Who was exposed to shaking

Modelled from the ShakeMap and population data. Alert level green: low likelihood of casualties and damage.

II · Weak shaking: 1,800 people

Estimated shaking in nearby towns

King CovePopulation 1,200I · Not felt
Sand PointPopulation 1,200I · Not felt

After the main event

Aftershocks within 50 km

USGS lists 13 M2.5+ earthquakes within 50 km in the following 30 days; the largest was M5.4 on July 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 424 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 · 77 km away · intensity VI
168 deaths$26 million damagetsunami
2023M7.2
Alaska Peninsula
16 Jul 2023 · 123 km away · intensity VI
1 deathtsunami
2020M7.8
Alaska
22 Jul 2020 · 276 km away · intensity VII
Limited damage (under $1M)tsunami
1788M8.0
Alaska Peninsula
6 Aug 1788 · 138 km away
tsunami
2020M7.6
Alaska
19 Oct 2020 · 197 km away · intensity IX
tsunami
1948M7.5
Alaska Peninsula
14 May 1948 · 109 km away

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

Nearby trackers