QuakeIndex

Earthquake · reviewed by a seismologist

M 1.7md

Earthquake near East Foothills, CA

No earthquake was likely felt in East Foothills in the 24 hours to 9:03 pm PST (05:03 UTC). The last one was M 2.9, 32 km (20 mi) E, at 9:44 am PDT on 31 October 2026, estimated intensity II (weak) in town. Every earthquake near East Foothills

This page: a magnitude 1.7 earthquake was recorded 20 km (12 mi) east-southeast of East Foothills, CA, at 6:28 am PDT on 10 June 2017 (13:28 UTC), 6.7 km deep.

USGS: 19 km ESE of East Foothills, California

19 km (12 mi) ENE of San Jose, CA

6:28 am PDT, Jun 10, 2017 · · 6.7 km deep · released about 12 lb of TNT

Every earthquake near East Foothills Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Santa Clara County 15 kmAlameda County 44 kmSanta Cruz County 51 kmStanislaus County 59 kmSan Mateo County 69 kmContra Costa County 72 kmSan Joaquin County 73 kmMerced County 79 kmSan Benito County 93 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
6:28 am PDT on 10 June 2017 ()
Where
20 km (12 mi) east-southeast of East Foothills, CA · earthquakes near East Foothills
Magnitude
M 1.7 (md)
Depth
6.7 km below the surface
Felt
no reports yet
Nearest
Santa Clara County, 15 km SSW
Nearest mapped fault
Calaveras fault, 7 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 3436 days ago

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 11 km (7 mi) from the epicentre. In East Foothills, 20 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: Morgan Hill, San Jose, San Martin, Milpitas.

How big was it?

This earthquake released about 12 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 1,300,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 900,000× the energy of this one
  3. Around the size people start to feel M 3.0 80× the energy of this one
  4. This earthquake M 1.7 about 12 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 24 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.9 The 1989 Loma Prieta, California Earthquake · 41 km SW of this epicentre
  2. 6.5 Near Morgan Hill, California · 25 km S of this epicentre
  3. 6.2 Near San Jose, California · 18 km WSW of this epicentre
  4. 6.2 The 1984 Morgan Hill, California Earthquake · 7 km WSW of this epicentre
  5. 6.1 Near San Jose, California · 23 km SW 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 37.3355, -121.6020. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Santa Clara County, CA 15 km (9 mi) SSW earthquakes near Santa Clara County
Alameda County, CA 44 km (27 mi) NW earthquakes near Alameda County
Santa Cruz County, CA 51 km (32 mi) SW earthquakes near Santa Cruz County
Stanislaus County, CA 59 km (36 mi) ENE earthquakes near Stanislaus County
San Mateo County, CA 69 km (43 mi) W earthquakes near San Mateo County
Contra Costa County, CA 72 km (45 mi) NNW earthquakes near Contra Costa County

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

Aftershocks so far

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

  1. 2.1 4 km SW of Saratoga, California
  2. 1.8 5 km ENE of Aromas, California
  3. 1.8 4 km SE of Livermore, California
  4. 2.3 5 km SW of Gilroy, California
  5. 2.3 3 km N of East Foothills, California
  6. 2.6 3 km N of East Foothills, California
  7. 2.8 3 km NNE of East Foothills, California
  8. 2.0 3 km N of East Foothills, California
  9. 3.3 3 km NNE of East Foothills, California
  10. 1.8 4 km N of East Foothills, California
  11. 2.6 3 km N of East Foothills, California
  12. 3.3 3 km N of East Foothills, California
  13. 1.7 18 km SW of Gustine, California
  14. 1.5 19 km SW of Gustine, California
  15. 1.6 Northern California

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.