quarry blast · reviewed by a seismologist
M 1.5ml
Earthquake near Home Gardens, CA
USGS: 5 km SSE of Home Gardens, CA
7 km (4 mi) ESE of Corona, CA · 87 km (54 mi) ESE of Los Angeles, CA
- When
- 3:21 pm PDT on 1 October 2026 ()
- Where
- 5 km (3 mi) SSE of Home Gardens, CA · earthquakes near Home Gardens
- Magnitude
- M 1.5 (ml)
- Depth
- -0.5 km below the surface
- Felt
- no reports yet
- Nearest
- Orange County, 32 km SW
- Nearest mapped fault
- Elsinore fault, 5 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 28 hours ago
A magnitude 1.5 earthquake was recorded 5 km (3 mi) SSE of Home Gardens, CA, at 3:21 pm PDT on 1 October 2026 (22:21 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: El Cerrito Corona, Corona, Norco, Woodcrest, Eastvale, Pedley.
USGS catalogues this as quarry blast, not an earthquake.
How big was it?
This earthquake released about 5 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 3,000,000× the energy of this one
- Magna, Utah 2020 M 5.7 2,100,000× the energy of this one
- Around the size people start to feel M 3.0 190× the energy of this one
- This earthquake M 1.5 about 5 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 4.4 on 2018-08-29 — about 22,000 times the energy of this one.
Before 2016, the USGS record lists 12 earthquakes of M5 or more within 50 km; the five largest:
- 6.7 The 1918 San Jacinto, California Earthquake · 49 km E of this epicentre
- 6.2 3 km SE of San Bernardino, California · 35 km NE of this epicentre
- 6.0 The 1910 Lake Elsinore, California Earthquake · 18 km SSE of this epicentre
- 5.5 The 1990 Upland, California Earthquake · 39 km NNW of this epicentre
- 5.4 5km S of Chino Hills, CA · 28 km WNW 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 33.8372, -117.4955. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Orange County, CA | 32 km (20 mi) | SW | earthquakes near Orange County |
| Los Angeles County, CA | 81 km (50 mi) | WNW | earthquakes near Los Angeles County |
| San Diego County, CA | 112 km (70 mi) | SE | earthquakes near San Diego County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
2 earthquakes have been recorded within 50 km since this one.
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.
Revisions
USGS refines a solution as more stations report. Every change we have seen is listed here.
| What changed | From | To | When |
|---|---|---|---|
| event type | earthquake | quarry blast | |
| review status | automatic | reviewed | |
| longitude | -117.5 | -117.5 | |
| latitude | 33.84 | 33.84 | |
| depth | 2.45 | -0.51 | |
| magnitude | 1.8 | 1.48 | |
| longitude | -117.5 | -117.5 | |
| latitude | 33.83 | 33.84 | |
| depth | 2.27 | 2.45 | |
| magnitude | 1.6 | 1.8 |
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.