169 km ESE of Nikolski, Alaska

Yes. A magnitude 3.2 earthquake was recorded 169 km ESE of Nikolski, Alaska at 20:55 UTC on 2017-06-27, 20 km deep.

2017-06-27 20:55 UTC · 20 km deep · released about 1,900 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: 2017-06-27 20:55 UTC
Magnitude: M 3.2 (ml)
Depth: 20 km below the surface
Felt: no reports yet
Nearest mapped fault: Alaska-Aleutian subduction zone, 16 km from its surface trace — near is not the same as on
Status: Reviewed by a seismologist

USGS · last changed by USGS 1193 days ago · we first saw it 1193 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

At this magnitude and depth, people at rest would likely notice it out to about 42 km (26 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 1,900 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.2 would have released about 32 times as much.

Northridge, California 1994 M 6.7 180,000× the energy of this one
Mineral, Virginia 2011 M 5.8 7,900× the energy of this one
Magna, Utah 2020 M 5.7 5,600× the energy of this one
This earthquake M 3.2 about 1,900 lb of TNT
Around the size people start to feel M 3.0 this one released 2× more

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 5.9 on 2017-05-24 — about 11,000 times the energy of this one.

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

6.5 183 km S of Unalaska, Alaska · 18 km ESE of this epicentre Apr 19, 1957
6.4 123 km ESE of Nikolski, Alaska · 49 km NW of this epicentre Oct 13, 2009
6.3 136 km ESE of Nikolski, Alaska · 44 km NNW of this epicentre Jan 12, 1952
6.3 130 km ESE of Nikolski, Alaska · 48 km NNW of this epicentre Jun 12, 1958
6.2 130 km S of Unalaska, Alaska · 50 km NNW of this epicentre Jan 21, 1952

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

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

2.4 133 km S of Unalaska, Alaska 02:55 UTC
2.1 139 km ESE of Nikolski, Alaska 12:26 UTC
2.7 149 km S of Unalaska, Alaska 00:36 UTC
3.0 154 km ESE of Nikolski, Alaska 02:18 UTC
2.1 129 km ESE of Nikolski, Alaska 04:28 UTC
2.5 140 km ESE of Nikolski, Alaska 04:20 UTC
2.3 150 km ESE of Nikolski, Alaska 15:21 UTC
3.5 146 km ESE of Nikolski, Alaska 09:46 UTC
2.0 126 km ESE of Nikolski, Alaska 03:49 UTC
1.8 158 km ESE of Nikolski, Alaska 19:56 UTC
1.9 147 km ESE of Nikolski, Alaska 15:24 UTC
2.0 147 km S of Unalaska, Alaska 03:27 UTC
3.3 152 km ESE of Nikolski, Alaska 18:56 UTC
4.4 136 km ESE of Nikolski, Alaska 09:08 UTC
3.3 148 km SE of Nikolski, Alaska 11:30 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 04:22 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.