QuakeIndex

Earthquake · reviewed by a seismologist

M 3.5ml

4 km NNE of Port Orford, Oregon

· 16 km deep · released about 3.1 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Curry County 41 kmCoos County 55 kmJosephine County 86 km
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 3.5 (ml)
Depth
16 km below the surface
Felt
59 reports · strongest reported intensity IV
Measured shaking
intensity IV (ShakeMap)
Nearest
Curry County, 41 km SSE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2412 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 59 people have reported feeling it to USGS.

How big was it?

This earthquake released about 3.1 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.5 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 55,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,500× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,700× the energy of this one
  4. This earthquake M 3.5 about 3.1 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.5× 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 42.7775, -124.4725. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Curry County, OR 41 km (25 mi) NNW of here earthquakes near Curry County
Coos County, OR 55 km (34 mi) SW of here earthquakes near Coos County
Josephine County, OR 86 km (53 mi) WNW of here earthquakes near Josephine County
Douglas County, OR 121 km (75 mi) WSW of here earthquakes near Douglas County
Del Norte County, CA 121 km (75 mi) NNW of here earthquakes near Del Norte County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

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

  1. 1.8 10 km NNE of Nesika Beach, Oregon
  2. 2.5 42 km W of Port Orford, Oregon
  3. 1.7 12 km SSE of Port Orford, Oregon
  4. 2.6 10 km NW of Langlois, Oregon
  5. 1.5 15 km ESE of Myrtle Point, Oregon
  6. 2.1 11 km S of Port Orford, Oregon
  7. 1.9 12 km NW of Nesika Beach, Oregon
  8. 1.5 5 km ESE of Coquille, Oregon
  9. 2.4 12 km SSE of Port Orford, Oregon
  10. 2.6 11 km SSE of Port Orford, Oregon
  11. 3.1 12 km SSE of Port Orford, Oregon
  12. 1.7 11 km SSE of Port Orford, Oregon
  13. 1.5 6 km SE of Gold Beach, Oregon
  14. 2.4 6 km NE of Bandon, Oregon
  15. 1.6 14 km NW of Nesika Beach, 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 4.5 on 2019-11-30 — it released about 31 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.