Earthquake · reviewed by a seismologist
M 2.9md
61km WNW of Bayview, CA
Yes. A magnitude 2.9 earthquake was recorded 61km WNW of Bayview, CA, at 1:40 am PDT on 10 August 2020 (08:40 UTC), 25 km deep.
- When
- Magnitude
- M 2.9 (md)
- Depth
- 25 km below the surface
- Felt
- no reports yet
- Nearest
- Humboldt County, 84 km ESE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2213 days ago
Earthquake alerts for Bayview, CA
Get a notification in this browser when USGS records an earthquake near Bayview, 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 21 km (13 mi) from the epicentre. 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 720 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.9 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 21,000× the energy of this one
- Magna, Utah 2020 M 5.7 15,000× the energy of this one
- Around the size people start to feel M 3.0 1.3× the energy of this one
- This earthquake M 2.9 about 720 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
The largest earthquake within 50 km since 2016 was M 5.1 on 2017-07-29 — about 1,700 times the energy of this one.
Before 2016, the USGS record lists 17 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 52 km WNW of Big Lagoon, California · 44 km NNE of this epicentre
- 6.5 The 2010 Eureka, California Earthquake · 36 km SSE of this epicentre
- 6.4 Northwest of Eureka, California · 32 km ENE of this epicentre
- 6.3 67 km W of Trinidad, California · 12 km NW of this epicentre
- 6.0 near the coast of Northern California · 25 km SSE 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 40.9445, -124.8692. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Humboldt County, CA | 84 km (52 mi) | ESE | earthquakes near Humboldt County |
| Del Norte County, CA | 116 km (72 mi) | NE | earthquakes near Del Norte County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
48 earthquakes have been recorded within 50 km since this one.
- 2.5 98km W of Trinidad, CA
- 2.1 17km W of Humboldt Hill, CA
- 2.1 18km WNW of Ferndale, CA
- 2.1 21km WNW of Ferndale, CA
- 2.5 40km WNW of Ferndale, CA
- 2.7 69km W of Ferndale, CA
- 2.4 44km W of Ferndale, CA
- 3.0 96km WNW of Bayview, CA
- 3.3 16km WNW of Bayview, CA
- 2.6 21km W of Humboldt Hill, CA
- 2.6 52km W of Ferndale, CA
- 3.0 102km WNW of Bayview, CA
- 2.6 56km WNW of Ferndale, CA
- 3.2 97km W of Trinidad, CA
- 4.1 94km W of Trinidad, 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.