QuakeIndex

Earthquake · reviewed by a seismologist

M 5.6mww

210 km WSW of Pistol River, Oregon

· 10 km deep · released about 3.8 kilotons 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 5.6 (mww)
Depth
10 km below the surface
Felt
21 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1608 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 21 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.8 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 45× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2× the energy of this one
  3. Magna, Utah 2020 M 5.7 1.4× the energy of this one
  4. This earthquake M 5.6 about 3.8 kilotons of TNT
  5. Around the size people start to feel M 3.0 this one released 7,900× 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 41.8105, -126.8616. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.6 195 km WSW of Pistol River, Oregon
  2. 2.6 199 km WSW of Pistol River, Oregon
  3. 2.9 207 km WSW of Pistol River, Oregon
  4. 2.6 186 km W of Pistol River, Oregon
  5. 2.9 231 km WSW of Pistol River, Oregon
  6. 2.7 199 km W of Pistol River, Oregon
  7. 3.4 233 km WSW of Pistol River, Oregon
  8. 3.1 204 km WSW of Pistol River, Oregon
  9. 2.9 189 km WSW of Pistol River, Oregon
  10. 3.2 210 km WSW of Pistol River, Oregon
  11. 2.5 230 km W of Gold Beach, Oregon
  12. 2.6 243 km WSW of Pistol River, Oregon
  13. 2.9 198 km WSW of Pistol River, Oregon
  14. 2.9 184 km WSW of Pistol River, Oregon
  15. 4.3 194 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 5.2 on 2018-07-24.

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

On USGS

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