76 km SW of Unalaska, Alaska

Yes. A magnitude 1.8 earthquake was recorded 76 km SW of Unalaska, Alaska, at 8:09 pm AKDT on 1 July 2019 (04:09 UTC), 13 km deep.

2019-07-02 04:09 UTC · 13 km deep · released about 15 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: 2019-07-02 04:09 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 2667 days ago · we first saw it 2667 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 5 km (3 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 since 2016 was M 4.7 on 2017-11-11 — about 22,000 times the energy of this one.

Before 2016, the USGS record lists 27 earthquakes of M5 or more within 50 km; the five largest:

7.8 81 km E of Nikolski, Alaska · 48 km SSW of this epicentre Jul 2, 1965
6.9 67 km SW of Unalaska, Alaska · 9 km NE of this epicentre Feb 27, 1987
6.8 81 km ENE of Nikolski, Alaska · 37 km SW of this epicentre Jan 13, 1955
6.8 68 km SSW of Unalaska, Alaska · 30 km ESE of this epicentre Mar 29, 1957
6.5 84 km E of Nikolski, Alaska · 45 km SSW of this epicentre Jan 13, 1955

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

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Aftershocks so far

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

2.2 65 km SW of Unalaska, Alaska 14:40 UTC
1.7 61 km WSW of Unalaska, Alaska 03:01 UTC
2.0 100 km ENE of Nikolski, Alaska 16:03 UTC
1.6 97 km SW of Unalaska, Alaska 17:20 UTC
2.1 47 km SSW of Unalaska, Alaska 14:14 UTC
2.9 63 km SW of Unalaska, Alaska 07:30 UTC
2.9 92 km SSW of Unalaska, Alaska 22:32 UTC
2.7 53 km SW of Unalaska, Alaska 15:57 UTC
2.7 69 km SW of Unalaska, Alaska 06:55 UTC
2.1 52 km SW of Unalaska, Alaska 07:15 UTC
2.5 77 km SW of Unalaska, Alaska 03:22 UTC
2.1 86 km ENE of Nikolski, Alaska 22:53 UTC
2.3 35 km WSW of Unalaska, Alaska 06:23 UTC
1.5 72 km SW of Unalaska, Alaska 22:27 UTC
1.5 57 km SW of Unalaska, Alaska 10:39 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 07:58 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.