QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6ml

4 km SSW of Sandy, Oregon

· 13 km deep · released about 6.4 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Multnomah County 23 kmClackamas County 24 kmClark County 48 kmHood River County 52 kmMarion County 56 kmWashington County 66 kmSkamania County 78 kmYamhill County 81 kmColumbia County 89 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 1.6 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
Multnomah County, 23 km NNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2413 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

How big was it?

This earthquake released about 6.4 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,400,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
  3. Around the size people start to feel M 3.0 150× the energy of this one
  4. This earthquake M 1.6 about 6.4 lb of TNT

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 45.3635, -122.2935. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Multnomah County, OR 23 km (14 mi) SSE of here earthquakes near Multnomah County
Clackamas County, OR 24 km (15 mi) NNW of here earthquakes near Clackamas County
Clark County, WA 48 km (30 mi) SSE of here earthquakes near Clark County
Hood River County, OR 52 km (33 mi) WSW of here earthquakes near Hood River County
Marion County, OR 56 km (35 mi) NNE of here earthquakes near Marion County
Washington County, OR 66 km (41 mi) ESE of here earthquakes near Washington County

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

Aftershocks so far

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

  1. 1.6 8 km NNW of Government Camp, Oregon
  2. 2.0 8 km NNW of Government Camp, Oregon
  3. 1.6 1 km SSE of King City, Oregon
  4. 2.0 4 km SE of Mill Plain, Washington
  5. 1.6 8 km ESE of Molalla, Oregon
  6. 2.6 3 km SE of Mill Plain, Washington
  7. 1.7 4 km WNW of Molalla, Oregon
  8. 2.7 4 km WNW of Molalla, Oregon
  9. 1.7 8 km SE of Molalla, Oregon
  10. 1.9 5 km E of Scotts Mills, Oregon
  11. 1.7 5 km ESE of Scotts Mills, Oregon
  12. 1.5 4 km NNW of North Bonneville, Washington
  13. 2.0 1 km NNW of Salmon Creek, Washington
  14. 2.0 7 km ESE of Molalla, Oregon
  15. 1.8 3 km N of Wilsonville, 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.