58 km E of Pedro Bay, Alaska

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.

How big was it?

This earthquake released about 30 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.0 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 500,000× the energy of this one
2. Magna, Utah 2020 M 5.7 350,000× the energy of this one
3. Around the size people start to feel M 3.0 32× the energy of this one
4. This earthquake M 2.0 about 30 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 45,000,000 times the energy of this one.

Before 2016, the USGS record lists 22 earthquakes of M5 or more within 50 km; the five largest:

1. 6.4 52 km ENE of Pedro Bay, Alaska · 14 km NNW of this epicentre Jul 29, 2015
2. 6.2 70 km E of Port Alsworth, Alaska · 40 km N of this epicentre Dec 17, 1968
3. 6.0 53 km W of Anchor Point, Alaska · 16 km E of this epicentre Apr 18, 1970
4. 5.9 66 km ENE of Pedro Bay, Alaska · 27 km N of this epicentre Nov 20, 1993
5. 5.9 Southern Alaska · 41 km SSE of this epicentre Jan 24, 2009

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 59.7851, -153.0678. Map © OpenStreetMap contributors.

Nearby places

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

Aftershocks so far

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

1. 1.5 57 km W of Anchor Point, Alaska 08:46 UTC
2. 1.5 64 km W of Happy Valley, Alaska 23:39 UTC
3. 2.2 62 km W of Anchor Point, Alaska 23:21 UTC
4. 1.7 38 km ENE of Pedro Bay, Alaska 13:55 UTC
5. 1.7 66 km E of Port Alsworth, Alaska 11:29 UTC
6. 1.7 38 km E of Pedro Bay, Alaska 16:29 UTC
7. 1.6 54 km WNW of Ninilchik, Alaska 13:23 UTC
8. 1.8 47 km SE of Pedro Bay, Alaska 11:59 UTC
9. 1.5 61 km E of Pedro Bay, Alaska 08:08 UTC
10. 1.5 43 km WNW of Anchor Point, Alaska 06:58 UTC
11. 1.7 61 km WNW of Nanwalek, Alaska 01:12 UTC
12. 2.0 36 km E of Pedro Bay, Alaska 20:51 UTC
13. 1.7 43 km NE of Pedro Bay, Alaska 10:43 UTC
14. 1.5 62 km WNW of Nanwalek, Alaska 02:51 UTC
15. 1.6 50 km E of Pedro Bay, Alaska 00:40 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 22:43 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.