Earthquake · automatic estimate, may change
M 1.3md
Earthquake near Loyola, CA
USGS: 11 km SW of Loyola, CA
12 km (8 mi) WSW of Cupertino, CA · 32 km (20 mi) W of San Jose, CA
- When
- 10:48 pm PDT on 29 September 2026 ()
- Where
- 11 km (7 mi) SW of Loyola, CA · earthquakes near Loyola
- Magnitude
- M 1.3 (md)
- Depth
- -0.3 km below the surface
- Felt
- no reports yet
- Nearest
- San Mateo County, 24 km NW
- Nearest mapped fault
- Butano fault, 3 km from its surface trace — near is not the same as on
- Status
- Automatic — a machine’s first estimate, which may change
USGS · last changed by USGS · we first saw it 3 days ago
A magnitude 1.3 earthquake was recorded 11 km (7 mi) SW of Loyola, CA, at 10:48 pm PDT on 29 September 2026 (05:48 UTC). This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.
Earthquakes near other towns within 30 km: Los Altos Hills, Saratoga, Cupertino, Los Altos, Portola Valley, Ladera.
How big was it?
This earthquake released about 2.7 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.3 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 5,600,000× the energy of this one
- Magna, Utah 2020 M 5.7 4,000,000× the energy of this one
- Around the size people start to feel M 3.0 350× the energy of this one
- This earthquake M 1.3 about 2.7 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 440,000 times the energy of this one.
Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:
- 6.9 The 1989 Loma Prieta, California Earthquake · 37 km SE of this epicentre
- 6.3 16 km SW of Davenport, California · 42 km SSW of this epicentre
- 6.2 Near San Jose, California · 33 km E of this epicentre
- 6.2 The 1984 Morgan Hill, California Earthquake · 44 km E of this epicentre
- 6.1 Near San Jose, California · 34 km ESE 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 37.2720, -122.1702. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Mateo County, CA | 24 km (15 mi) | NW | earthquakes near San Mateo County |
| Santa Cruz County, CA | 32 km (20 mi) | SSE | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 43 km (27 mi) | E | earthquakes near Santa Clara County |
| Alameda County, CA | 48 km (30 mi) | NNE | earthquakes near Alameda County |
| Contra Costa County, CA | 75 km (46 mi) | NNE | earthquakes near Contra Costa County |
| San Francisco County, CA | 91 km (57 mi) | NW | earthquakes near San Francisco County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
3 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.
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.