QuakeIndex

Earthquake · reviewed by a seismologist

M 3.9mb

43 km WNW of Yachats, Oregon

· 38 km deep · released about 11 tons of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Lincoln County 61 kmBenton County 95 kmPolk County 109 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 3.9 (mb)
Depth
38 km below the surface
Felt
17 reports · strongest reported intensity IV
Measured shaking
intensity III (ShakeMap)
Nearest
Lincoln County, 61 km ENE
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1565 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 17 people have reported feeling it to USGS.

How big was it?

This earthquake released about 11 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.9 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 16,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 710× the energy of this one
  3. Magna, Utah 2020 M 5.7 500× the energy of this one
  4. This earthquake M 3.9 about 11 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 22× 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 44.4357, -124.6193. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Lincoln County, OR 61 km (38 mi) WSW of here earthquakes near Lincoln County
Benton County, OR 95 km (59 mi) W of here earthquakes near Benton County
Polk County, OR 109 km (68 mi) WSW of here earthquakes near Polk County
Tillamook County, OR 132 km (82 mi) SSW of here earthquakes near Tillamook County
Yamhill County, OR 137 km (85 mi) SW of here earthquakes near Yamhill County

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

Aftershocks so far

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

  1. 1.6 24 km W of Newport, Oregon
  2. 2.5 71 km W of Yachats, Oregon
  3. 1.7 29 km WNW of Yachats, Oregon
  4. 1.7 37 km W of Yachats, Oregon
  5. 1.9 51 km W of Yachats, Oregon
  6. 2.2 71 km W of Yachats, Oregon
  7. 1.9 3 km NW of Yachats, Oregon
  8. 1.7 72 km W of Yachats, Oregon
  9. 2.2 25 km W of Newport, Oregon
  10. 1.9 23 km WNW of Yachats, Oregon
  11. 2.8 57 km W of Waldport, Oregon
  12. 2.7 27 km WNW of Yachats, Oregon
  13. 1.6 18 km WNW of Yachats, Oregon
  14. 1.8 71 km W of Yachats, Oregon
  15. 1.7 41 km WNW of Yachats, 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

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