96 km S of Lowell Point, Alaska

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

At this magnitude and depth, people at rest would likely notice it out to about 18 km (11 mi) from the epicentre. 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 120 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.4 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 130,000× the energy of this one
2. Magna, Utah 2020 M 5.7 89,000× the energy of this one
3. Around the size people start to feel M 3.0 7.9× the energy of this one
4. This earthquake M 2.4 about 120 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 6 earthquakes of M5 or more within 50 km; the five largest:

1. 6.5 92 km SSE of Lowell Point, Alaska · 49 km ENE of this epicentre Jan 12, 1946
2. 6.4 138 km SE of Halibut Cove, Alaska · 48 km SSE of this epicentre Mar 28, 1964
3. 5.7 121 km S of Lowell Point, Alaska · 27 km SSE of this epicentre Mar 28, 1964
4. 5.7 125 km SE of Halibut Cove, Alaska · 31 km SSE of this epicentre Apr 2, 1964
5. 5.6 52 km S of Lowell Point, Alaska · 44 km N of this epicentre Jul 23, 1964

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 59.2053, -149.5774. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.4 99 km S of Lowell Point, Alaska 07:01 UTC
2. 2.3 61 km SE of Fox River, Alaska 05:13 UTC
3. 1.9 66 km SSE of Lowell Point, Alaska 01:13 UTC
4. 2.0 74 km ESE of Halibut Cove, Alaska 18:50 UTC
5. 2.2 106 km SE of Halibut Cove, Alaska 17:54 UTC
6. 2.4 124 km S of Lowell Point, Alaska 22:07 UTC
7. 1.7 65 km SE of Fox River, Alaska 16:36 UTC
8. 1.9 112 km SE of Halibut Cove, Alaska 19:34 UTC
9. 2.2 70 km SSW of Lowell Point, Alaska 11:00 UTC
10. 1.6 93 km ESE of Halibut Cove, Alaska 04:54 UTC
11. 2.2 111 km SE of Halibut Cove, Alaska 08:36 UTC
12. 1.9 62 km SSE of Lowell Point, Alaska 09:16 UTC
13. 1.8 123 km SE of Halibut Cove, Alaska 01:48 UTC
14. 2.1 60 km ESE of Fox River, Alaska 16:37 UTC
15. 4.2 101 km SE of Halibut Cove, Alaska 09:00 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 12:40 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.