QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near Del Monte Forest, CA

No earthquake was likely felt in Del Monte Forest in the 24 hours to 11:55 pm PST (07:55 UTC). The last one was M 3.9, 68 km (42 mi) E, at 3:19 am PDT on 11 August 2026, estimated intensity II (weak) in town; 34 felt reports to USGS. Every earthquake near Del Monte Forest

This page: a magnitude 1.7 earthquake was recorded 28 km (17 mi) west-northwest of Del Monte Forest, CA, at 12:36 am PDT on 5 September 2025 (07:36 UTC), 16 km deep.

USGS: 28 km WNW of Del Monte Forest, CA

74 km (46 mi) SSW of San Jose, CA · 33 km (21 mi) SSW of Santa Cruz, CA

12:36 am PDT, Sep 5, 2025 · · 16 km deep · released about 9.3 lb of TNT

10 km30 km60 km120 km N Santa Cruz County 38 kmSanta Clara County 74 kmSan Mateo County 79 kmMonterey County 97 kmSan Benito County 102 kmAlameda County 107 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
12:36 am PDT on 5 September 2025 ()
Where
28 km (17 mi) west-northwest of Del Monte Forest, CA · earthquakes near Del Monte Forest
Magnitude
M 1.7 (md)
Depth
16 km below the surface
Felt
no reports yet
Nearest
Santa Cruz County, 38 km NNE
Nearest mapped fault
San Gregorio fault, 8 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 432 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Del Monte Forest, 28 km away, the estimate is intensity I (not felt). 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: Pacific Grove.

How big was it?

This earthquake released about 9.3 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.

  1. Mineral, Virginia 2011 M 5.8 1,600,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,100,000× the energy of this one
  3. Around the size people start to feel M 3.0 100× the energy of this one
  4. This earthquake M 1.7 about 9.3 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

No earthquake of M4 or more has been recorded within 50 km since our catalogue begins in 2016.

Before 2016, the USGS record lists 8 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.9 The 1989 Loma Prieta, California Earthquake · 47 km NE of this epicentre
  2. 6.3 22 km S of Davenport, California · 11 km N of this epicentre
  3. 6.3 16 km SW of Davenport, California · 26 km NNW of this epicentre
  4. 5.7 Monterey Bay area, California · 14 km NE of this epicentre
  5. 5.5 1 km WNW of Davenport, California · 34 km N 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 36.7138, -122.2202. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Santa Cruz County, CA 38 km (24 mi) NNE earthquakes near Santa Cruz County
Santa Clara County, CA 74 km (46 mi) NE earthquakes near Santa Clara County
San Mateo County, CA 79 km (49 mi) N earthquakes near San Mateo County
Monterey County, CA 97 km (60 mi) ESE earthquakes near Monterey County
San Benito County, CA 102 km (63 mi) E earthquakes near San Benito County
Alameda County, CA 107 km (67 mi) NNE earthquakes near Alameda County

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

14 earthquakes have been recorded within 50 km since this one.

  1. 1.8 13 km WNW of Bonny Doon, CA
  2. 1.8 11 km SSW of La Selva Beach, CA
  3. 2.1 13 km S of Carmel By The Sea, CA
  4. 2.1 14 km S of Carmel By The Sea, CA
  5. 2.4 12 km WNW of Bonny Doon, CA
  6. 1.7 1 km ESE of Boulder Creek, CA
  7. 1.6 3 km ESE of Boulder Creek, CA
  8. 1.6 0 km SW of Boulder Creek, CA
  9. 4.6 1 km SE of Boulder Creek, CA
  10. 2.3 16 km NW of Pacific Grove, CA
  11. 2.5 1 km SW of Aptos Hills-Larkin Valley, CA
  12. 2.3 10 km SW of Bonny Doon, CA
  13. 2.8 4 km N of Corralitos, CA
  14. 2.0 23 km SW of Bonny Doon, 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

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.