QuakeIndex

Earthquake · reviewed by a seismologist

M 2.3md

187 km WSW of Pistol River, Oregon

· 9.4 km deep · released about 85 lb of TNT

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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
Magnitude
M 2.3 (md)
Depth
9.4 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 576 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 85 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.3 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 180,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 130,000× the energy of this one
  3. Around the size people start to feel M 3.0 11× the energy of this one
  4. This earthquake M 2.3 about 85 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 41.9655, -126.6198. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 195 km WSW of Pistol River, Oregon
  2. 2.7 168 km WSW of Port Orford, Oregon
  3. 2.6 199 km WSW of Pistol River, Oregon
  4. 2.9 207 km WSW of Pistol River, Oregon
  5. 2.9 177 km WSW of Port Orford, Oregon
  6. 4.1 179 km WSW of Port Orford, Oregon
  7. 2.5 175 km WSW of Port Orford, Oregon
  8. 2.6 186 km W of Pistol River, Oregon
  9. 2.5 152 km WSW of Pistol River, Oregon
  10. 2.9 231 km WSW of Pistol River, Oregon
  11. 2.7 199 km W of Pistol River, Oregon
  12. 3.1 204 km WSW of Pistol River, Oregon
  13. 3.7 145 km WSW of Pistol River, Oregon
  14. 2.9 189 km WSW of Pistol River, Oregon
  15. 3.5 155 km W of Pistol River, Oregon

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . 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 250,000 times the energy of this one.

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

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.