93 km SSE of Sand 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 9 km (6 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 7.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 2,000,000× the energy of this one
2. Magna, Utah 2020 M 5.7 1,400,000× the energy of this one
3. Around the size people start to feel M 3.0 130× the energy of this one
4. This earthquake M 1.6 about 7.6 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 7.6 on 2020-10-19 — about 1,000,000,000 times the energy of this one.

Before 2016, the USGS record lists 21 earthquakes of M5 or more within 50 km; the five largest:

1. 7.4 54 km SE of Sand Point, Alaska · 50 km N of this epicentre May 31, 1917
2. 6.6 72 km SE of Sand Point, Alaska · 49 km NNE of this epicentre Oct 16, 1932
3. 6.6 85 km SE of Sand Point, Alaska · 35 km NE of this epicentre Oct 9, 1985
4. 6.1 79 km SE of Sand Point, Alaska · 27 km NNE of this epicentre Nov 14, 1985
5. 6.0 71 km SSE of Sand Point, Alaska · 24 km N of this epicentre Jun 27, 1918

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 54.5508, -160.0028. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 3.0 122 km SSE of Sand Point, Alaska 20:48 UTC
2. 3.2 134 km SSE of Sand Point, Alaska 22:15 UTC
3. 2.7 47 km S of Sand Point, Alaska 05:27 UTC
4. 3.1 101 km SSE of Sand Point, Alaska 20:47 UTC
5. 2.2 113 km SSE of Sand Point, Alaska 15:01 UTC
6. 1.9 94 km SSE of Sand Point, Alaska 22:43 UTC
7. 1.9 103 km SSE of Sand Point, Alaska 19:14 UTC
8. 2.1 132 km SSE of Sand Point, Alaska 08:22 UTC
9. 2.7 140 km SSE of Sand Point, Alaska 16:40 UTC
10. 1.7 76 km SSE of Sand Point, Alaska 04:03 UTC
11. 2.1 131 km SSE of Sand Point, Alaska 21:49 UTC
12. 1.9 71 km SSE of Sand Point, Alaska 14:01 UTC
13. 1.9 132 km SSE of Sand Point, Alaska 08:24 UTC
14. 2.7 129 km SSE of Sand Point, Alaska 08:15 UTC
15. 2.0 140 km SSE of Sand Point, Alaska 05:56 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 18:37 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.