Earthquake · reviewed by a seismologist
M 2.1md
38km SSW of Lopez Point, CA
Yes. A magnitude 2.1 earthquake was recorded 38km SSW of Lopez Point, CA, at 2:22 pm PDT on 10 April 2021 (21:22 UTC), 16 km deep.
- When
- Magnitude
- M 2.1 (md)
- Depth
- 16 km below the surface
- Felt
- no reports yet
- Nearest
- Monterey County, 69 km NNE
- Status
- Reviewed by a seismologist
USGS · last changed by USGS · we first saw it 2041 days ago
Earthquake alerts for Cambria, CA
Get a notification in this browser when USGS records an earthquake near Cambria, 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 minor earthquake. Quakes this small are rarely felt and do not cause damage.
At this magnitude and depth, people at rest would likely notice it out to about 5 km (3 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 43 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 350,000× the energy of this one
- Magna, Utah 2020 M 5.7 250,000× the energy of this one
- Around the size people start to feel M 3.0 22× the energy of this one
- This earthquake M 2.1 about 43 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 4 earthquakes of M5 or more within 50 km:
- 6.2 28km NW of Cambria, CA · 32 km E of this epicentre
- 5.7 Southwest of Cambria, California · 49 km ESE of this epicentre
- 5.2 25 km NW of San Simeon, California · 33 km ENE of this epicentre
- 5.2 22 km NW of San Simeon, California · 34 km ENE 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 35.6950, -121.6862. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Monterey County, CA | 69 km (43 mi) | NNE | earthquakes near Monterey County |
| San Benito County, CA | 115 km (72 mi) | NNE | earthquakes near San Benito County |
| San Luis Obispo County, CA | 117 km (73 mi) | ESE | earthquakes near San Luis Obispo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
59 earthquakes have been recorded within 50 km since this one.
- 2.2 23km SSE of Lopez Point, CA
- 2.0 24km SSE of Lopez Point, CA
- 1.5 17km NNW of San Simeon, CA
- 1.9 26km W of San Simeon, CA
- 2.0 8km NNE of San Simeon, CA
- 2.9 8km NNE of San Simeon, CA
- 1.8 22km NW of San Simeon, CA
- 2.0 6km NW of San Simeon, CA
- 1.6 19km NW of San Simeon, CA
- 2.5 13km NNW of San Simeon, CA
- 2.6 23km WNW of Lopez Point, CA
- 1.8 10km ESE of Lopez Point, CA
- 1.7 18km NNW of San Simeon, CA
- 1.7 18km NW of San Simeon, CA
- 2.1 18km NNW of San Simeon, 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.