6km WSW of Bella Vista, CA

2018-07-29 06:57 UTC · 28 km deep · released about 430 lb of TNT

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: 2018-07-29 06:57 UTC
Magnitude: M 2.8 (md)
Depth: 28 km below the surface
Felt: 12 reports · strongest reported intensity III
Nearest: Shasta County, 26 km ENE
Status: Reviewed by a seismologist

USGS · last changed by USGS 2979 days ago · we first saw it 2979 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage. 12 people have reported feeling it to USGS.

How big was it?

This earthquake released about 430 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.

Mineral, Virginia 2011 M 5.8 35,000× the energy of this one
Magna, Utah 2020 M 5.7 25,000× the energy of this one
Around the size people start to feel M 3.0 2.2× the energy of this one
This earthquake M 2.8 about 430 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

Map loads when it scrolls into view

Epicentre 40.6290, -122.3052. Map © OpenStreetMap contributors.

Nearby places

Place	Distance	Direction
Shasta County, CA	26 km (16 mi)	WSW of here	earthquakes near Shasta County
Tehama County, CA	56 km (35 mi)	N of here	earthquakes near Tehama County
Trinity County, CA	68 km (42 mi)	E of here	earthquakes near Trinity County
Siskiyou County, CA	108 km (67 mi)	S of here	earthquakes near Siskiyou County
Glenn County, CA	114 km (71 mi)	N of here	earthquakes near Glenn County
Butte County, CA	123 km (76 mi)	NNW of here	earthquakes near Butte 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.

1.5 16km SW of Manton, CA 18:45 UTC
2.2 15km SW of Manton, CA 03:17 UTC
2.3 18km NNE of Shingletown, CA 13:55 UTC
1.9 18km NNE of Shingletown, CA 10:50 UTC
1.7 9km NE of Shasta Lake, CA 20:03 UTC
2.8 7km NW of Montgomery Creek, CA 17:21 UTC
1.6 16km W of Manton, CA 21:05 UTC
1.9 6km ENE of Shasta, CA 23:23 UTC
2.0 14km SE of Millville, CA 08:34 UTC
1.6 20km NE of Red Bluff, CA 09:38 UTC
1.8 21km NE of Red Bluff, CA 04:46 UTC
2.3 19km NE of Red Bluff, CA 03:05 UTC
1.5 17km NE of Red Bluff, CA 14:09 UTC
1.6 9km NNE of Shasta Lake, CA 20:51 UTC
1.8 5km WNW of Shasta Lake, CA 15:54 UTC

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of 13:17 UTC. QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

The official USGS event page — the source of record for every value above
Did you feel it? Report it to USGS — reports go to USGS, not to us
ShakeMap for this event, when USGS has produced one

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