Earthquake · reviewed by a seismologist
M 1.5md
Earthquake near Corralitos, CA
No earthquake was likely felt in Corralitos in the 24 hours to 12:16 pm PST (20:16 UTC). The last one was M 2.4, 20 km (12 mi) ESE, at 12:04 pm PDT on 22 October 2026, estimated intensity II (weak) in town. Every earthquake near Corralitos
This page: a magnitude 1.5 earthquake was recorded in Corralitos, CA, at 7:43 am PST on 22 February 2023 (15:43 UTC), 12 km deep.
USGS: 1km WNW of Corralitos, CA
9 km (5 mi) NNW of Watsonville, CA · 34 km (21 mi) S of San Jose, CA
- When
- 7:43 am PST on 22 February 2023 ()
- Where
- in Corralitos, CA · earthquakes near Corralitos
- Magnitude
- M 1.5 (md)
- Depth
- 12 km below the surface
- Felt
- no reports yet
- Nearest
- Santa Cruz County, 17 km W
- Nearest mapped fault
- Zayante-Vergeles fault, under 1 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 1358 days ago
Earthquake alerts for Corralitos, CA
Get a notification in this browser when USGS records an earthquake near Corralitos, 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 it was probably too small to be felt, even directly above it. 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: Aptos Hills-Larkin Valley, Amesti, Day Valley, Aptos, La Selva Beach, Rio Del Mar.
How big was it?
This earthquake released about 6.2 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 2,500,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,700,000× the energy of this one
- Around the size people start to feel M 3.0 150× the energy of this one
- This earthquake M 1.5 about 6.2 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 2022-10-25 — about 190,000 times the energy of this one.
Before 2016, the USGS record lists 32 earthquakes of M5 or more within 50 km; the five largest:
- 6.9 The 1989 Loma Prieta, California Earthquake · 7 km NW of this epicentre
- 6.5 Near Morgan Hill, California · 21 km NE of this epicentre
- 6.3 22 km S of Davenport, California · 40 km WSW of this epicentre
- 6.3 16 km SW of Davenport, California · 47 km W of this epicentre
- 6.2 Near San Jose, California · 34 km N 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 36.9912, -121.8210. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Santa Cruz County, CA | 17 km (10 mi) | W | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 28 km (17 mi) | NNE | earthquakes near Santa Clara County |
| San Mateo County, CA | 68 km (42 mi) | NW | earthquakes near San Mateo County |
| Alameda County, CA | 73 km (46 mi) | N | earthquakes near Alameda County |
| San Benito County, CA | 78 km (48 mi) | ESE | earthquakes near San Benito County |
| Monterey County, CA | 95 km (59 mi) | SSE | earthquakes near Monterey County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
31 earthquakes have been recorded within 50 km since this one.
- 1.7 9km E of Alum Rock, CA
- 1.8 7km SSE of San Juan Bautista, CA
- 1.9 2km E of Aromas, CA
- 3.0 9km ENE of San Martin, CA
- 2.5 12km ESE of Alum Rock, CA
- 1.6 12km ESE of Alum Rock, CA
- 1.7 12km ESE of Alum Rock, CA
- 2.4 12km ESE of Alum Rock, CA
- 1.7 2km NNW of Tres Pinos, CA
- 2.2 15km N of Morgan Hill, CA
- 1.8 2km N of Tres Pinos, CA
- 4.4 1km NNW of Tres Pinos, CA
- 2.3 2km E of Aromas, CA
- 1.7 0km NNE of Tres Pinos, CA
- 1.9 8km NE of Interlaken, 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.