QuakeIndex

sonic boom · reviewed by a seismologist

M 2.8md

2 km SSE of Gold River, California

· -0.3 km deep · released about 420 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Sacramento County 20 kmAmador County 54 kmYolo County 59 kmSutter County 62 kmEl Dorado County 64 kmPlacer County 67 kmSolano County 72 kmYuba County 74 kmSan Joaquin 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 2.8 (md)
Depth
-0.3 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
Sacramento County, 20 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 573 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 1 person has reported feeling it to USGS.

USGS catalogues this as sonic boom, not an earthquake.

How big was it?

This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 26,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.3× the energy of this one
  4. This earthquake M 2.8 about 420 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 38.6105, -121.2340. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Sacramento County, CA 20 km (13 mi) NNE of here earthquakes near Sacramento County
Amador County, CA 54 km (33 mi) WNW of here earthquakes near Amador County
Yolo County, CA 59 km (36 mi) E of here earthquakes near Yolo County
Sutter County, CA 62 km (39 mi) SE of here earthquakes near Sutter County
El Dorado County, CA 64 km (40 mi) WSW of here earthquakes near El Dorado County
Placer County, CA 67 km (42 mi) SW of here earthquakes near Placer County

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

Aftershocks so far

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

  1. 1.8 1 km WSW of Granite Bay, CA
  2. 1.8 6 km WNW of Ione, CA
  3. 2.1 2 km WSW of Granite Bay, CA
  4. 2.6 2 km NW of Granite Bay, CA
  5. 2.5 12 km WSW of Lincoln, CA
  6. 2.3 13 km NNE of Rio Linda, CA
  7. 2.8 11 km WSW of Lincoln, CA
  8. 2.2 13 km WSW of Lincoln, CA
  9. 2.1 12 km NW of Roseville, CA
  10. 1.8 11 km SW of Lincoln, CA
  11. 2.2 12 km WSW of Lincoln, CA
  12. 2.2 8km N of West Sacramento, CA
  13. 1.9 8km WNW of Ione, CA
  14. 2.2 10km ENE of Clay, CA
  15. 1.9 10km WNW of Laguna West-Lakeside, CA

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.