Earthquake · reviewed by a seismologist
M 1.7md
Earthquake near Gustine, CA
No earthquake was likely felt in Gustine in the 24 hours to 10:15 pm PST (06:15 UTC). The last one was M 3.1, 23 km (14 mi) WSW, at 9:18 pm PDT on 21 October 2026, estimated intensity II (weak) in town; 9 felt reports to USGS. Every earthquake near Gustine
This page: a magnitude 1.7 earthquake was recorded 21 km (13 mi) southwest of Gustine, CA, at 9:29 am PDT on 8 March 2026 (16:29 UTC), 11 km deep.
USGS: 21 km SW of Gustine, CA
61 km (38 mi) ESE of San Jose, CA · 39 km (24 mi) ENE of Gilroy, CA
- When
- 9:29 am PDT on 8 March 2026 ()
- Where
- 21 km (13 mi) southwest of Gustine, CA · earthquakes near Gustine
- Magnitude
- M 1.7 (md)
- Depth
- 11 km below the surface
- Felt
- no reports yet
- Nearest
- Merced County, 40 km ENE
- Nearest mapped fault
- Ortigalita fault, 3 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 239 days ago
Earthquake alerts for Gustine, CA
Get a notification in this browser when USGS records an earthquake near Gustine, 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, people at rest would likely notice it out to about 6 km (4 mi) from the epicentre. In Gustine, 21 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: Newman, Los Banos.
How big was it?
This earthquake released about 11 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.7 would have released about 32 times as much.
- Mineral, Virginia 2011 M 5.8 1,400,000× the energy of this one
- Magna, Utah 2020 M 5.7 970,000× the energy of this one
- Around the size people start to feel M 3.0 86× the energy of this one
- This earthquake M 1.7 about 11 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 110,000 times the energy of this one.
Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:
- 6.5 Near Morgan Hill, California · 42 km W of this epicentre
- 5.9 10 km SE of Tres Pinos, California · 43 km S of this epicentre
- 5.8 The 1979 Coyote Lake, California Earthquake · 31 km W of this epicentre
- 5.5 7 km SW of Hollister, California · 44 km SW of this epicentre
- 5.5 3 km ENE of Tres Pinos, California · 37 km SSW 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 37.1202, -121.1665. Map © OpenStreetMap contributors.
Nearby places
| Place | Distance | Direction from the epicentre | |
|---|---|---|---|
| Merced County, CA | 40 km (25 mi) | ENE | earthquakes near Merced County |
| Santa Clara County, CA | 48 km (30 mi) | WNW | earthquakes near Santa Clara County |
| Stanislaus County, CA | 51 km (32 mi) | NNE | earthquakes near Stanislaus County |
| San Benito County, CA | 57 km (35 mi) | S | earthquakes near San Benito County |
| Santa Cruz County, CA | 76 km (47 mi) | W | earthquakes near Santa Cruz County |
| Alameda County, CA | 88 km (55 mi) | NW | earthquakes near Alameda County |
Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.
Aftershocks so far
54 earthquakes have been recorded within 50 km since this one.
- 2.1 5 km SW of Ridgemark, CA
- 2.1 2 km WSW of San Juan Bautista, CA
- 1.7 2 km E of Aromas, CA
- 1.9 4 km W of San Juan Bautista, CA
- 1.5 16 km N of Morgan Hill, CA
- 2.3 3 km WSW of San Juan Bautista, CA
- 2.7 19 km ENE of Tres Pinos, CA
- 2.3 16 km N of Morgan Hill, CA
- 1.9 20 km SSW of Gustine, CA
- 3.0 10 km SSE of San Juan Bautista, CA
- 2.1 12 km ESE of Gilroy, CA
- 1.6 2 km ENE of Aromas, CA
- 1.8 6 km WSW of Ridgemark, CA
- 1.6 3 km S of Ridgemark, CA
- 1.6 8 km ENE of Hollister, 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.