164 km WSW of Port Orford, Oregon

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 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

1. Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
2. Magna, Utah 2020 M 5.7 32,000× the energy of this one
3. Around the size people start to feel M 3.0 2.8× the energy of this one
4. This earthquake M 2.7 about 340 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 42.4278, -126.4597. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 4.9 125 km WSW of Port Orford, Oregon 09:55 UTC
2. 2.7 168 km WSW of Port Orford, Oregon 04:40 UTC
3. 2.9 163 km W of Port Orford, Oregon 06:04 UTC
4. 2.9 177 km WSW of Port Orford, Oregon 03:36 UTC
5. 4.1 179 km WSW of Port Orford, Oregon 20:43 UTC
6. 2.5 175 km WSW of Port Orford, Oregon 18:26 UTC
7. 2.7 137 km W of Gold Beach, Oregon 00:42 UTC
8. 2.6 186 km W of Pistol River, Oregon 17:59 UTC
9. 2.5 132 km WSW of Port Orford, Oregon 02:25 UTC
10. 3.5 156 km W of Port Orford, Oregon 01:19 UTC
11. 3.5 155 km W of Pistol River, Oregon 05:27 UTC
12. 2.7 175 km WSW of Port Orford, Oregon 06:56 UTC
13. 2.6 160 km W of Port Orford, Oregon 16:36 UTC
14. 2.7 138 km WSW of Port Orford, Oregon 12:05 UTC
15. 3.0 146 km WSW of Port Orford, Oregon 19:02 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 23:48 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 5.9 on 2021-06-04 — it released about 63,000 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.