194 km SSE of False Pass, Alaska

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

How big was it?

This earthquake released about 240 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 63,000× the energy of this one
2. Magna, Utah 2020 M 5.7 45,000× the energy of this one
3. Around the size people start to feel M 3.0 4× the energy of this one
4. This earthquake M 2.6 about 240 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.

Where

Epicentre 53.2702, -162.1387. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.7 227 km SSE of False Pass, Alaska 14:47 UTC
2. 2.7 212 km SSE of False Pass, Alaska 06:40 UTC
3. 2.7 218 km SSE of False Pass, Alaska 07:02 UTC
4. 3.1 214 km SSE of False Pass, Alaska 18:02 UTC
5. 2.8 212 km SSE of False Pass, Alaska 05:15 UTC
6. 2.7 191 km SSE of False Pass, Alaska 15:44 UTC
7. 2.6 204 km SSE of False Pass, Alaska 15:27 UTC
8. 2.7 228 km SSE of False Pass, Alaska 03:01 UTC
9. 3.3 206 km S of King Cove, Alaska 10:05 UTC
10. 2.6 228 km SSE of False Pass, Alaska 00:56 UTC
11. 3.0 205 km S of King Cove, Alaska 12:02 UTC
12. 3.2 south of Alaska 00:05 UTC
13. 3.0 212 km SSE of False Pass, Alaska 02:55 UTC
14. 2.7 155 km SSE of False Pass, Alaska 14:45 UTC
15. 2.7 238 km SSE of False Pass, Alaska 15:10 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 16:01 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

For this area

The largest earthquake within 50 km in our catalogue was M 4.4 on 2019-10-26 — it released about 500 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

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.