Earthquake · reviewed by a seismologist
M 2.7md
Earthquake near McCloud, CA
No earthquake was likely felt in McCloud in the 24 hours to 9:16 pm PST (05:16 UTC). The last one was M 2.1, 13 km (8 mi) N, at 12:35 am PDT on 13 August 2026, estimated intensity II (weak) in town. Every earthquake near McCloud
This page: a magnitude 2.7 earthquake was recorded 46 km (29 mi) east-northeast of McCloud, CA, at 3:34 am PDT on 29 April 2018 (10:34 UTC), 4.0 km deep.
USGS: 32km SE of Tennant, CA
- When
- 3:34 am PDT on 29 April 2018 ()
- Where
- 46 km (29 mi) east-northeast of McCloud, CA · earthquakes near McCloud
- Magnitude
- M 2.7 (md)
- Depth
- 4.0 km below the surface
- Felt
- no reports yet
- Nearest
- Modoc County, 78 km ENE
- Nearest mapped fault
- Mayfield fault, 3 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 3114 days ago
Earthquake alerts for McCloud, CA
Get a notification in this browser when USGS records an earthquake near McCloud, CA. No account or email needed.
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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 25 km (16 mi) from the epicentre. In McCloud, 46 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.
How big was it?
This earthquake released about 340 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 45,000× the energy of this one
- Magna, Utah 2020 M 5.7 32,000× the energy of this one
- Around the size people start to feel M 3.0 2.8× the energy of this one
- This earthquake M 2.7 about 340 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 since 1900 lists no earthquake of M5 or more within 50 km.
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 41.3967, -121.6230. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Modoc County, CA | 78 km (49 mi) | ENE | earthquakes near Modoc County |
| Siskiyou County, CA | 79 km (49 mi) | WNW | earthquakes near Siskiyou County |
| Shasta County, CA | 79 km (49 mi) | SSW | earthquakes near Shasta County |
| Lassen County, CA | 113 km (70 mi) | SE | earthquakes near Lassen County |
| Jackson County, OR | 143 km (89 mi) | NW | earthquakes near Jackson County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
52 earthquakes have been recorded within 50 km since this one.
- 1.6 11km WNW of Big Bend, CA
- 1.9 2km NNE of Fall River Mills, CA
- 1.6 12km N of McCloud, CA
- 2.5 16km ESE of McCloud, CA
- 1.6 18km ESE of McCloud, CA
- 1.6 17km N of Burney, CA
- 1.8 5km N of McCloud, CA
- 1.8 15km N of Burney, CA
- 2.1 10km SSW of Tennant, CA
- 2.2 16km SE of McCloud, CA
- 1.9 4km N of McCloud, CA
- 1.6 13km N of McCloud, CA
- 1.9 13km N of McCloud, CA
- 1.5 13km N of McCloud, CA
- 1.7 13km N of McCloud, 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.