63 km ENE of Pedro Bay, Alaska

A magnitude -0.4 earthquake was recorded 63 km ENE of Pedro Bay, Alaska at 07:47 UTC on 2026-10-02. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 0.007 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 0.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 2,300,000,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,600,000,000× the energy of this one
3. Around the size people start to feel M 3.0 140,000× the energy of this one
4. This earthquake M -0.4 about 0.007 lb of TNT

Energy from the Gutenberg–Richter relation (log₁₀E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

For this area

The largest earthquake within 50 km since 2016 was M 7.1 on 2016-01-24 — about 200,000,000,000 times the energy of this one.

Before 2016, the USGS record lists 25 earthquakes of M5 or more within 50 km; the five largest:

1. 6.4 75 km WNW of Ninilchik, Alaska · 28 km NNE of this epicentre Feb 7, 1988
2. 6.4 52 km ENE of Pedro Bay, Alaska · 18 km SSW of this epicentre Jul 29, 2015
3. 6.2 70 km E of Port Alsworth, Alaska · 12 km N of this epicentre Dec 17, 1968
4. 6.1 73 km WNW of Ninilchik, Alaska · 40 km NNE of this epicentre Jul 9, 1998
5. 6.0 53 km W of Anchor Point, Alaska · 32 km SSE of this epicentre Apr 18, 1970

Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.

Where

Epicentre 60.0422, -153.0873. Map © OpenStreetMap contributors.

Nearby places

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

5 earthquakes have been recorded within 50 km since this one.

1. 0.3 63 km ENE of Pedro Bay, Alaska 11:01 UTC
2. -1.0 65 km ENE of Pedro Bay, Alaska 10:48 UTC
3. -1.1 64 km ENE of Pedro Bay, Alaska 10:38 UTC
4. -1.2 64 km ENE of Pedro Bay, Alaska 09:58 UTC
5. -0.8 64 km ENE of Pedro Bay, Alaska 08:32 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 01:40 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

• The official USGS event page — the source of record for every value above
• Did you feel it? Report it to USGS — reports go to USGS, not to us
• ShakeMap for this event, when USGS has produced one

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.