QuakeIndex

Earthquake · reviewed by a seismologist

M 3.0ml

Earthquake near Mountain House, CA

No earthquake was likely felt in Mountain House in the 24 hours to 7:08 pm PST (03:08 UTC). The last one was M 3.5, 41 km (26 mi) S, at 7:21 am PDT on 27 September 2026, estimated intensity II (weak) in town; 8 felt reports to USGS. Every earthquake near Mountain House

This page: a magnitude 3.0 earthquake was recorded 6 km (4 mi) west-northwest of Mountain House, CA, at 1:58 pm PDT on 11 June 2019 (20:58 UTC), 3.7 km deep. 70 people have reported feeling it to USGS.

USGS: 6km WNW of Mountain House, CA

59 km (37 mi) NNE of San Jose, CA · 16 km (10 mi) WNW of Tracy, CA

1:58 pm PDT, Jun 11, 2019 · · 3.7 km deep · released about 920 lb of TNT

Every earthquake near Mountain House Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Alameda County 32 kmSan Joaquin County 33 kmContra Costa County 33 kmStanislaus County 59 kmSolano County 60 kmSanta Clara County 65 kmSacramento County 76 kmSan Mateo County 80 kmSanta Cruz County 94 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
1:58 pm PDT on 11 June 2019 ()
Where
6 km (4 mi) west-northwest of Mountain House, CA · earthquakes near Mountain House
Magnitude
M 3.0 (ml)
Depth
3.7 km below the surface
Felt
70 reports · strongest reported intensity IV
Nearest
Alameda County, 32 km WSW
Nearest mapped fault
Corral Hollow-Carnegie fault, 12 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 2625 days ago

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 36 km (22 mi) from the epicentre. In Mountain House, 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: Discovery Bay 12 km, intensity III · Brentwood 17 km, intensity III · Tracy 17 km, intensity III · Livermore 19 km, intensity II · Oakley 24 km, intensity II · Pleasanton 28 km, intensity II · Antioch 29 km, intensity II · Dublin 31 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 920 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.0 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 370,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 16,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 12,000× the energy of this one
  4. This earthquake M 3.0 about 920 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 6 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.8 The 1980 Livermore, California Earthquake · 15 km WNW of this epicentre
  2. 5.7 15 km NE of East Foothills, California · 36 km SSW of this epicentre
  3. 5.5 6 km NNE of East Foothills, California · 43 km SSW of this epicentre
  4. 5.4 9 km NE of Livermore, California · 10 km WSW of this epicentre
  5. 5.3 6 km E of East Foothills, California · 47 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 37.7978, -121.6053. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Alameda County, CA 32 km (20 mi) WSW earthquakes near Alameda County
San Joaquin County, CA 33 km (20 mi) ENE earthquakes near San Joaquin County
Contra Costa County, CA 33 km (21 mi) WNW earthquakes near Contra Costa County
Stanislaus County, CA 59 km (37 mi) ESE earthquakes near Stanislaus County
Solano County, CA 60 km (37 mi) NNW earthquakes near Solano County
Santa Clara County, CA 65 km (40 mi) S earthquakes near Santa Clara County

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

Aftershocks so far

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

  1. 1.8 4km NNE of Dublin, CA
  2. 1.6 4km NNE of Dublin, CA
  3. 2.6 4km NNE of Dublin, CA
  4. 1.6 3km SW of Clayton, CA
  5. 1.6 4km N of Dublin, CA
  6. 1.6 4km NNE of Dublin, CA
  7. 1.6 4km NNE of Dublin, CA
  8. 2.0 4km N of Dublin, CA
  9. 1.9 4km N of Dublin, CA
  10. 1.8 4km NNE of Dublin, CA
  11. 1.7 4km N of Dublin, CA
  12. 2.0 4km N of Dublin, CA
  13. 1.6 4km N of Dublin, CA
  14. 2.0 4km NNE of Dublin, CA
  15. 2.3 4km N of Dublin, 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.