Earthquake · reviewed by a seismologist
M 1.8ml
Earthquake near Foresthill, CA
No earthquake was likely felt in Foresthill in the 24 hours to 5:50 pm PST (01:50 UTC). The last one was M 5.6, 211 km (131 mi) W, at 8:10 am PDT on 24 June 2026, estimated intensity II (weak) in town; 5,311 felt reports to USGS. Every earthquake near Foresthill
This page: a magnitude 1.8 earthquake was recorded 18 km (11 mi) east of Foresthill, CA, at 1:53 am PDT on 6 June 2020 (08:53 UTC), 16 km deep.
USGS: 18 km E of Foresthill, California
91 km (56 mi) NE of Sacramento, CA
- When
- 1:53 am PDT on 6 June 2020 ()
- Where
- 18 km (11 mi) east of Foresthill, CA · earthquakes near Foresthill
- Magnitude
- M 1.8 (ml)
- Depth
- 16 km below the surface
- Felt
- no reports yet
- Nearest
- Placer County, 10 km WNW
- Nearest mapped fault
- Foothills fault system, 22 km from its surface trace — near is not the same as on
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 1649 days ago
Earthquake alerts for Foresthill, CA
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Alerts are on for .
Not a warning. An alert comes after USGS publishes a quake, usually minutes after the shaking. For early warning use ShakeAlert, through your phone's Wireless Emergency Alerts or the MyShake app.
This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth it was probably too small to be felt, even directly above it. In Foresthill, 18 km away, the estimate is intensity II (weak). Estimated from magnitude, depth and distance with the intensity equation USGS Did You Feel It? uses; felt reports, where there are any, are the measurement.
Earthquakes near other towns within 30 km: Georgetown.
How big was it?
This earthquake released about 15 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 710,000× the energy of this one
- Around the size people start to feel M 3.0 63× the energy of this one
- This earthquake M 1.8 about 15 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.
For this area
No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.
Before 2016, the USGS record lists 3 earthquakes of M5 or more within 50 km:
- 5.3 11 km N of Soda Springs, California · 48 km NNE of this epicentre
- 5.1 8 km SSW of Kingvale, California · 28 km NNE of this epicentre
- 5.0 Nevada County, California · 48 km NNW of this epicentre
Since 2016: the QuakeIndex catalogue (US, M1.5+), built from the USGS FDSN event service. Before 2016: USGS ComCat, M5+ from 1900. Distances are between epicentres. This is the record, not a forecast.
Where
Epicentre 39.0344, -120.6102. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Placer County, CA | 10 km (6 mi) | WNW | earthquakes near Placer County |
| El Dorado County, CA | 28 km (18 mi) | SSE | earthquakes near El Dorado County |
| Nevada County, CA | 32 km (20 mi) | NNW | earthquakes near Nevada County |
| Sierra County, CA | 61 km (38 mi) | N | earthquakes near Sierra County |
| Amador County, CA | 66 km (41 mi) | S | earthquakes near Amador County |
| Yuba County, CA | 69 km (43 mi) | WNW | earthquakes near Yuba 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.
- 2.0 4 km WSW of Tahoe Vista, CA
- 2.4 4 km N of Dollar Point, CA
- 2.1 23 km W of Sunnyside-Tahoe City, CA
- 2.2 24 km W of Sunnyside-Tahoe City, CA
- 2.1 24 km W of Sunnyside-Tahoe City, CA
- 2.3 4km SSE of Truckee, CA
- 2.0 22km WNW of Truckee, CA
- 1.8 4km WSW of Tahoe Vista, CA
- 1.9 4km N of Dollar Point, CA
- 1.9 4km WSW of Tahoe Vista, CA
- 2.7 21km WNW of Sunnyside-Tahoe City, CA
- 2.0 32km WSW of Truckee, CA
- 2.2 26km W of Sunnyside-Tahoe City, CA
- 1.7 35km WNW of Truckee, CA
- 3.3 24km WNW of Truckee, 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
- 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.