109 km SE of Sand Point, Alaska

Yes. A magnitude 2.2 earthquake was recorded 109 km SE of Sand Point, Alaska, at 10:15 pm AKST on 20 February 2021 (07:15 UTC), 16 km deep.

2021-02-21 07:15 UTC · 16 km deep · released about 60 lb of TNT

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Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.

When: 2021-02-21 07:15 UTC
Magnitude: M 2.2 (ml)
Depth: 16 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2076 days ago · we first saw it 2076 days ago

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 60 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.2 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 250,000× the energy of this one
Magna, Utah 2020 M 5.7 180,000× the energy of this one
Around the size people start to feel M 3.0 16× the energy of this one
This earthquake M 2.2 about 60 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 130,000,000 times the energy of this one.

Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:

6.6 72 km SE of Sand Point, Alaska · 36 km NW of this epicentre Oct 16, 1932
6.6 85 km SE of Sand Point, Alaska · 27 km WNW of this epicentre Oct 9, 1985
6.5 94 km ESE of Sand Point, Alaska · 26 km N of this epicentre Feb 14, 1983
6.3 68 km SE of Sand Point, Alaska · 41 km NW of this epicentre Oct 30, 1932
6.1 79 km SE of Sand Point, Alaska · 38 km W of this epicentre Nov 14, 1985

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

Map loads when it scrolls into view

Aftershocks so far

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

2.7 90 km SE of Sand Point, Alaska 14:44 UTC
2.7 109 km SSE of Sand Point, Alaska 08:50 UTC
3.8 86 km SE of Sand Point, Alaska 00:11 UTC
3.7 116 km SSE of Sand Point, Alaska 22:48 UTC
2.2 94 km SE of Sand Point, Alaska 18:36 UTC
2.8 113 km SSE of Sand Point, Alaska 15:59 UTC
3.0 123 km SSE of Sand Point, Alaska 12:58 UTC
2.5 115 km SSE of Sand Point, Alaska 06:24 UTC
3.4 119 km SSE of Sand Point, Alaska 15:08 UTC
4.4 93 km SSE of Sand Point, Alaska 13:54 UTC
2.8 79 km ESE of Sand Point, Alaska 12:31 UTC
2.9 106 km SSE of Sand Point, Alaska 18:19 UTC
2.4 116 km SSE of Sand Point, Alaska 14:45 UTC
2.3 77 km ESE of Sand Point, Alaska 01:54 UTC
2.3 103 km SSE of Sand Point, Alaska 20:37 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:38 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.