Earthquake · automatic estimate, may change
M 2.6md
Earthquake near Woodside, CA
No earthquake was likely felt in Woodside in the 24 hours to 11:46 pm PST (07:46 UTC). The last one was M 1.9, in Woodside, at 4:14 pm PDT on 11 October 2026, estimated intensity II (weak) in town; 1 felt report to USGS. Every earthquake near Woodside
This page: a magnitude 2.6 earthquake was recorded in Woodside, CA, at 4:45 pm PDT on 23 October 2025 (23:45 UTC), 5.2 km deep. 262 people have reported feeling it to USGS. The magnitude and location are an automatic first estimate and may change.
USGS: 1 km ESE of Woodside, CA
10 km (6 mi) WNW of Palo Alto, CA · 41 km (25 mi) WNW of San Jose, CA
- When
- 4:45 pm PDT on 23 October 2025 ()
- Where
- in Woodside, CA · earthquakes near Woodside
- Magnitude
- M 2.6 (md)
- Depth
- 5.2 km below the surface
- Felt
- 262 reports · strongest reported intensity III
- Nearest
- San Mateo County, 11 km W
- Nearest mapped fault
- San Andreas fault, 1 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 300 days ago
Earthquake alerts for Woodside, CA
Get a notification in this browser when USGS records an earthquake near Woodside, 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 small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.
At this magnitude and depth, people at rest would likely notice it out to about 23 km (14 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.
Likely felt in: Menlo Park 6 km, intensity III · Redwood City 6 km, intensity III · San Carlos 9 km, intensity III · Palo Alto 9 km, intensity III · East Palo Alto 10 km, intensity III · Belmont 11 km, intensity III · Los Altos 12 km, intensity II · Foster City 15 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 250 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.6 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 61,000× the energy of this one
- Magna, Utah 2020 M 5.7 43,000× the energy of this one
- Around the size people start to feel M 3.0 3.8× the energy of this one
- This earthquake M 2.6 about 250 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 2018-01-04 — about 450 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 7.9 The 1906 San Francisco, California Earthquake · 45 km NW of this epicentre
- 6.2 Near San Jose, California · 42 km ESE of this epicentre
- 6.1 Near San Jose, California · 47 km ESE of this epicentre
- 5.8 7 km NNW of Boulder Creek, California · 28 km SSE of this epicentre
- 5.7 15 km NE of East Foothills, California · 50 km E 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 37.4273, -122.2448. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| San Mateo County, CA | 11 km (7 mi) | W | earthquakes near San Mateo County |
| Alameda County, CA | 38 km (24 mi) | NE | earthquakes near Alameda County |
| Santa Cruz County, CA | 51 km (31 mi) | SSE | earthquakes near Santa Cruz County |
| Santa Clara County, CA | 54 km (34 mi) | ESE | earthquakes near Santa Clara County |
| Contra Costa County, CA | 61 km (38 mi) | NNE | earthquakes near Contra Costa County |
| San Francisco County, CA | 77 km (48 mi) | WNW | earthquakes near San Francisco County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
60 earthquakes have been recorded within 50 km since this one.
- 1.6 5 km ESE of San Ramon, CA
- 2.3 5 km WSW of San Francisco Zoo, CA
- 3.2 4 km SE of San Ramon, CA
- 1.5 3 km SE of Pacifica, CA
- 2.1 6 km E of Alum Rock, CA
- 1.6 5 km ESE of San Ramon, CA
- 1.7 5 km ESE of San Ramon, CA
- 1.7 4 km ESE of San Ramon, CA
- 1.7 4 km SE of San Ramon, CA
- 2.6 4 km SE of San Ramon, CA
- 1.6 4 km SE of San Ramon, CA
- 1.6 4 km SE of San Ramon, CA
- 1.7 4 km SE of San Ramon, CA
- 3.3 4 km SE of San Ramon, CA
- 2.4 3 km SE of San Ramon, 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.