QuakeIndex

Earthquake · reviewed by a seismologist

M 5.5mww

252 km W of Bandon, Oregon

· 10 km deep · released about 2.7 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 5.5 (mww)
Depth
10 km below the surface
Felt
11 reports · strongest reported intensity III
Measured shaking
intensity III (ShakeMap)
USGS impact alert
green
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1609 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 11 people have reported feeling it to USGS.

How big was it?

This earthquake released about 2.7 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 63× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2.8× the energy of this one
  3. Magna, Utah 2020 M 5.7 2× the energy of this one
  4. This earthquake M 5.5 about 2.7 kilotons of TNT
  5. Around the size people start to feel M 3.0 this one released 5,600× 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 43.5517, -127.4685. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.1 240 km W of Bandon, Oregon
  2. 5.1 290 km W of Bandon, Oregon
  3. 2.9 241 km W of Bandon, Oregon
  4. 3.4 244 km W of Bandon, Oregon
  5. 5.7 212 km W of Bandon, Oregon
  6. 3.2 209 km W of Bandon, Oregon
  7. 3.3 219 km W of Bandon, Oregon
  8. 3.3 278 km WNW of Bandon, Oregon
  9. 3.9 279 km WNW of Bandon, Oregon
  10. 4.1 290 km WNW of Bandon, Oregon
  11. 2.7 282 km W of Bandon, Oregon
  12. 2.8 226 km WNW of Barview, Oregon
  13. 3.2 225 km W of Langlois, Oregon
  14. 3.0 230 km WNW of Bandon, Oregon
  15. 3.1 263 km WNW of Bandon, 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 5.5 on 2016-11-28.

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

On USGS

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