QuakeIndex

Earthquake · reviewed by a seismologist

M 4.3mb

191 km WSW of Port Orford, Oregon

· 10 km deep · released about 43 tons 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 4.3 (mb)
Depth
10 km below the surface
Felt
2 reports · strongest reported intensity II
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3467 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.3 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 4,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 180× the energy of this one
  3. Magna, Utah 2020 M 5.7 130× the energy of this one
  4. This earthquake M 4.3 about 43 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 89× 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 42.3306, -126.7644. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 3.8 181 km WSW of Port Orford, Oregon
  2. 2.8 195 km WSW of Port Orford, Oregon
  3. 3.8 177 km W of Port Orford, Oregon
  4. 2.6 185 km WSW of Pistol River, Oregon
  5. 2.7 168 km W of Gold Beach, Oregon
  6. 4.4 202 km WSW of Pistol River, Oregon
  7. 4.3 197 km W of Pistol River, Oregon
  8. 3.6 171 km WSW of Port Orford, Oregon
  9. 2.7 202 km WSW of Port Orford, Oregon
  10. 2.6 149 km WSW of Port Orford, Oregon
  11. 2.6 197 km WSW of Port Orford, Oregon
  12. 2.5 194 km WSW of Pistol River, Oregon
  13. 2.8 184 km WSW of Port Orford, Oregon
  14. 2.5 184 km WSW of Port Orford, Oregon
  15. 2.7 156 km WSW of Port Orford, 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.

On USGS

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