QuakeIndex

Earthquake · reviewed by a seismologist

M 5.9mww

284 km WNW of Bandon, Oregon

· 10 km deep · released about 11 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 5.9 (mww)
Depth
10 km below the surface
Felt
61 reports · strongest reported intensity IV
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 280 days ago

This was a moderate earthquake. Shaking at this size can damage poorly built structures close to the epicentre. 61 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 6.9 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 63× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 32× the energy of this one
  3. Northridge, California 1994 M 6.7 16× the energy of this one
  4. This earthquake M 5.9 about 11 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 1.4× more
  6. Magna, Utah 2020 M 5.7 this one released 2× 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 43.7183, -127.8191. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.5 252 km W of Bandon, Oregon
  2. 3.1 254 km W of Bandon, Oregon
  3. 3.2 off the coast of Oregon
  4. 3.4 275 km W of Langlois, Oregon
  5. 3.0 236 km W of Bandon, Oregon
  6. 2.5 282 km W of Langlois, Oregon
  7. 2.9 277 km W of Langlois, Oregon
  8. 2.6 253 km W of Langlois, Oregon
  9. 2.8 off the coast of Oregon
  10. 3.2 258 km W of Bandon, Oregon
  11. 2.9 257 km W of Bandon, Oregon
  12. 3.3 off the coast of Oregon
  13. 4.3 off the coast of Oregon
  14. 4.1 331 km W of Bandon, Oregon
  15. 3.4 271 km W 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 6.3 on 2019-08-29 — it released about 4 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.