32 km WSW of Chenega, Alaska

A magnitude 1.6 earthquake was recorded 32 km WSW of Chenega, Alaska at 12:43 UTC on 2019-02-03. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 13 earthquakes of M5 or more within 50 km; the five largest:

1. 6.3 37 km SSE of Lowell Point, Alaska · 44 km WSW of this epicentre Mar 28, 1964
2. 6.1 25 km WSW of Chenega, Alaska · 10 km NNE of this epicentre Mar 28, 1964
3. 6.0 54 km SE of Lowell Point, Alaska · 32 km SW of this epicentre Mar 28, 1964
4. 5.9 33 km SSE of Lowell Point, Alaska · 40 km WSW of this epicentre Mar 29, 1964
5. 5.8 29 km NW of Chenega, Alaska · 39 km N of this epicentre Jul 25, 1937

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 59.9045, -148.5001. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 1.5 36 km NW of Chenega, Alaska 23:52 UTC
2. 1.8 33 km NW of Chenega, Alaska 08:22 UTC
3. 1.6 30 km NW of Chenega, Alaska 07:29 UTC
4. 1.5 34 km NW of Chenega, Alaska 09:04 UTC
5. 1.7 28 km NW of Chenega, Alaska 04:04 UTC
6. 1.7 31 km NW of Chenega, Alaska 11:35 UTC
7. 1.8 32 km WNW of Chenega, Alaska 07:02 UTC
8. 1.5 43 km NW of Chenega, Alaska 16:18 UTC
9. 1.7 33 km NW of Chenega, Alaska 02:18 UTC
10. 1.6 34 km NW of Chenega, Alaska 13:57 UTC
11. 2.0 25 km WNW of Chenega, Alaska 15:53 UTC
12. 1.6 32 km WSW of Chenega, Alaska 10:34 UTC
13. 2.0 34 km ESE of Primrose, Alaska 05:11 UTC
14. 2.9 27 km WSW of Chenega, Alaska 14:00 UTC
15. 1.5 27 km W of Chenega, Alaska 00:18 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 02:15 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.