QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

3 km WNW of Tigard, Oregon

· 26 km deep · released about 19 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Washington County 25 kmMultnomah County 34 kmYamhill County 44 kmClark County 45 kmClackamas County 58 kmColumbia County 59 kmMarion County 63 kmTillamook County 73 kmPolk County 75 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 1.9 (ml)
Depth
26 km below the surface
Felt
3 reports · strongest reported intensity III
Nearest
Washington County, 25 km WNW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 817 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage. 3 people have reported feeling it to USGS.

How big was it?

This earthquake released about 19 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 810,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 580,000× the energy of this one
  3. Around the size people start to feel M 3.0 51× the energy of this one
  4. This earthquake M 1.9 about 19 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 45.4392, -122.8202. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Washington County, OR 25 km (16 mi) ESE of here earthquakes near Washington County
Multnomah County, OR 34 km (21 mi) WSW of here earthquakes near Multnomah County
Yamhill County, OR 44 km (27 mi) ENE of here earthquakes near Yamhill County
Clark County, WA 45 km (28 mi) SW of here earthquakes near Clark County
Clackamas County, OR 58 km (36 mi) WNW of here earthquakes near Clackamas County
Columbia County, OR 59 km (37 mi) SSE of here earthquakes near Columbia County

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

Aftershocks so far

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

  1. 1.7 4 km NNE of Lafayette, Oregon
  2. 1.6 6 km SSE of Molalla, Oregon
  3. 1.6 10 km WSW of Felida, Washington
  4. 1.6 4 km ENE of Lafayette, Oregon
  5. 1.5 4 km SSW of Aloha, Oregon
  6. 2.0 4 km N of Newberg, Oregon
  7. 1.7 4 km NE of Lafayette, Oregon
  8. 1.5 2 km WSW of Stafford, Oregon
  9. 2.0 5 km NW of North Portland, Oregon
  10. 2.1 1 km ESE of Banks, Oregon
  11. 1.7 9 km SSW of Saint Paul, Oregon
  12. 1.8 10 km ESE of Molalla, Oregon
  13. 1.6 3 km NNE of Washougal, Washington
  14. 1.7 4 km ENE of Lafayette, Oregon
  15. 2.2 0 km SE of Barberton, Washington

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.