152 km WNW 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 1.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.3 would have released about 32 times as much.

1. Northridge, California 1994 M 6.7 130,000× the energy of this one
2. Mineral, Virginia 2011 M 5.8 5,600× the energy of this one
3. Magna, Utah 2020 M 5.7 4,000× the energy of this one
4. This earthquake M 3.3 about 1.3 tons of TNT
5. Around the size people start to feel M 3.0 this one released 2.8× 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.

Where

Epicentre 43.0701, -126.3072. Map © OpenStreetMap contributors.

Aftershocks so far

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

1. 2.9 178 km W of Bandon, Oregon 20:49 UTC
2. 2.7 132 km W of Langlois, Oregon 09:45 UTC
3. 2.9 195 km W of Port Orford, Oregon 09:23 UTC
4. 3.2 167 km WNW of Port Orford, Oregon 07:24 UTC
5. 2.8 195 km W of Bandon, Oregon 19:38 UTC
6. 2.9 189 km W of Bandon, Oregon 23:07 UTC
7. 2.8 148 km WNW of Port Orford, Oregon 05:34 UTC
8. 3.7 161 km W of Langlois, Oregon 02:39 UTC
9. 2.6 170 km WNW of Port Orford, Oregon 20:10 UTC
10. 3.4 195 km W of Langlois, Oregon 14:20 UTC
11. 4.2 194 km W of Langlois, Oregon 07:42 UTC
12. 3.0 183 km W of Langlois, Oregon 02:13 UTC
13. 2.8 161 km W of Langlois, Oregon 02:13 UTC
14. 2.7 191 km W of Bandon, Oregon 14:05 UTC
15. 2.9 152 km W of Langlois, Oregon 11:24 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 14:33 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 4.9 on 2016-01-23 — it released about 250 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.