Earthquake · reviewed by a seismologist
M 2.8md
Earthquake near Gilroy, CA
Yes: an earthquake was likely felt in Gilroy in the last 24 hours. M 1.6, 9 km (5 mi) E of Gilroy, at 1:22 am PST on 12 November 2026 (09:22 UTC); the estimated shaking in Gilroy was intensity II (weak). Every earthquake near Gilroy
This page: a magnitude 2.8 earthquake was recorded 6 km (3 mi) southwest of Gilroy, CA, at 10:39 am PST on 17 November 2018 (18:39 UTC), 4.0 km deep. 71 people have reported feeling it to USGS.
USGS: 6km SW of Gilroy, CA
in Gilroy, CA · 41 km (25 mi) SSE of San Jose, CA
- When
- 10:39 am PST on 17 November 2018 ()
- Where
- 6 km (3 mi) southwest of Gilroy, CA · earthquakes near Gilroy
- Magnitude
- M 2.8 (md)
- Depth
- 4.0 km below the surface
- Felt
- 71 reports · strongest reported intensity III
- Nearest
- Santa Clara County, 29 km NNW
- Nearest mapped fault
- Sargent 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 2912 days ago
Earthquake alerts for Gilroy, CA
Get a notification in this browser when USGS records an earthquake near Gilroy, 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 26 km (16 mi) from the epicentre. In Gilroy, 6 km away, the estimate is intensity III (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.
Likely felt in: Gilroy 6 km, intensity III · Watsonville 15 km, intensity II · Morgan Hill 18 km, intensity II · Prunedale 22 km, intensity II · Hollister 23 km, intensity II. Estimated for each town centre; each link is that town's own record.
How big was it?
This earthquake released about 420 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.8 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 36,000× the energy of this one
- Magna, Utah 2020 M 5.7 26,000× the energy of this one
- Around the size people start to feel M 3.0 2.3× the energy of this one
- This earthquake M 2.8 about 420 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 4.6 on 2017-11-13 — about 540 times the energy of this one.
Before 2016, the USGS record lists 31 earthquakes of M5 or more within 50 km; the five largest:
- 6.9 The 1989 Loma Prieta, California Earthquake · 25 km WNW of this epicentre
- 6.5 Near Morgan Hill, California · 16 km N of this epicentre
- 6.2 Near San Jose, California · 41 km NNW of this epicentre
- 6.2 The 1984 Morgan Hill, California Earthquake · 39 km N of this epicentre
- 6.1 Near San Jose, California · 31 km NNW 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 36.9682, -121.6097. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Santa Clara County, CA | 29 km (18 mi) | NNW | earthquakes near Santa Clara County |
| Santa Cruz County, CA | 36 km (22 mi) | W | earthquakes near Santa Cruz County |
| San Benito County, CA | 61 km (38 mi) | SE | earthquakes near San Benito County |
| Alameda County, CA | 80 km (50 mi) | NNW | earthquakes near Alameda County |
| Merced County, CA | 83 km (51 mi) | ENE | earthquakes near Merced County |
| San Mateo County, CA | 84 km (52 mi) | NW | earthquakes near San Mateo County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
34 earthquakes have been recorded within 50 km since this one.
- 1.7 4km WNW of San Juan Bautista, CA
- 2.4 15km NW of Pinnacles, CA
- 1.7 7km WSW of Gilroy, CA
- 2.4 4km WNW of San Juan Bautista, CA
- 1.6 14km SSW of Tres Pinos, CA
- 1.5 22km WSW of Los Banos, CA
- 2.5 4km S of San Juan Bautista, CA
- 1.9 13km S of Tres Pinos, CA
- 2.6 2km SSE of Day Valley, CA
- 2.0 5km WNW of San Juan Bautista, CA
- 1.7 14km S of Tres Pinos, CA
- 2.7 5km WNW of San Juan Bautista, CA
- 1.7 12km S of Tres Pinos, CA
- 1.6 9km NNE of Gonzales, CA
- 1.6 12km S of Tres Pinos, 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.