Earthquake · reviewed by a seismologist
M 1.5ml
Earthquake near Carlsbad, CA
No earthquake was likely felt in Carlsbad in the 24 hours to 6:53 am PST (14:53 UTC). The last one was M 3.5, 55 km (34 mi) WNW, at 1:22 pm PDT on 5 October 2026, estimated intensity II (weak) in town; 126 felt reports to USGS. Every earthquake near Carlsbad
This page: a magnitude 1.5 earthquake was recorded 8 km (5 mi) south-southwest of Carlsbad, CA, at 2:58 pm PST on 27 February 2017 (22:58 UTC), 13 km deep.
USGS: 8km SSW of Carlsbad, CA
10 km (6 mi) WSW of Carlsbad, CA · 38 km (24 mi) NW of San Diego, CA
- When
- 2:58 pm PST on 27 February 2017 ()
- Where
- 8 km (5 mi) south-southwest of Carlsbad, CA · earthquakes near Carlsbad
- Magnitude
- M 1.5 (ml)
- Depth
- 13 km below the surface
- Felt
- no reports yet
- Nearest
- San Diego County, 56 km E
- Nearest mapped fault
- Newport-Inglewood-Rose Canyon 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 3467 days ago
Earthquake alerts for Carlsbad, CA
Get a notification in this browser when USGS records an earthquake near Carlsbad, 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. In Carlsbad, 8 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: Encinitas, Oceanside, Solana Beach, Camp Pendleton South, Vista, Del Mar.
How big was it?
This earthquake released about 5.6 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 2,700,000× the energy of this one
- Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
- Around the size people start to feel M 3.0 170× the energy of this one
- This earthquake M 1.5 about 5.6 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 one earthquake of M5 or more within 50 km:
- 5.5 The 1986 Oceanside, California Earthquake · 48 km WSW 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 33.0912, -117.3768. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Diego County, CA | 56 km (35 mi) | E | earthquakes near San Diego County |
| Orange County, CA | 75 km (47 mi) | NNW | earthquakes near Orange County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
32 earthquakes have been recorded within 50 km since this one.
- 2.2 28km SW of La Jolla, CA
- 1.7 6km NNW of Lakeside, CA
- 1.6 42km WSW of Carlsbad, CA
- 2.3 45km WSW of Carlsbad, CA
- 1.6 47km WSW of Carlsbad, CA
- 1.6 9km E of Pala, CA
- 1.6 6km NNW of Lakeside, CA
- 2.1 5km ESE of Temecula, CA
- 1.8 10km ENE of Pala, CA
- 1.5 6km NNW of Lakeside, CA
- 2.3 2km S of San Pasqual, CA
- 1.6 6km NNW of Lakeside, CA
- 1.5 6km NNW of Lakeside, CA
- 1.8 18km SW of La Jolla, CA
- 1.6 6km NNW of Lakeside, 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.