196 km W of Adak, AK

Yes. A magnitude 1.8 earthquake was recorded 196 km W of Adak, AK at 19:10 UTC on 2020-07-02, 13 km deep.

2020-07-02 19:10 UTC · 13 km deep · released about 15 lb of TNT

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: 2020-07-02 19:10 UTC
Magnitude: M 1.8 (ml)
Depth: 13 km below the surface
Felt: no reports yet
Status: Reviewed by a seismologist

USGS · last changed by USGS 2321 days ago · we first saw it 2321 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 3 km (2 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 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.

Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
Magna, Utah 2020 M 5.7 710,000× the energy of this one
Around the size people start to feel M 3.0 63× the energy of this one
This earthquake M 1.8 about 15 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 in our catalogue was M 5.2 on 2016-11-23 — about 130,000 times the energy of this one.

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

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

1.7 176 km W of Adak, Alaska 13:33 UTC
2.4 220 km W of Adak, Alaska 21:56 UTC
1.9 170 km W of Adak, Alaska 13:24 UTC
1.9 178 km WSW of Adak, Alaska 23:15 UTC
2.1 162 km W of Adak, Alaska 01:10 UTC
2.1 194 km W of Adak, Alaska 11:25 UTC
2.3 188 km W of Adak, Alaska 02:44 UTC
1.8 172 km W of Adak, Alaska 22:34 UTC
4.0 195 km WNW of Adak, Alaska 06:10 UTC
3.7 230 km W of Adak, Alaska 13:45 UTC
2.3 180 km WSW of Adak, Alaska 21:32 UTC
3.5 187 km W of Adak, Alaska 10:41 UTC
1.7 171 km W of Adak, Alaska 10:47 UTC
2.1 161 km W of Adak, Alaska 17:11 UTC
1.9 167.8 km E of Adak, AK 22:14 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 08:27 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.