QuakeIndex

Earthquake · reviewed by a seismologist

M 1.6md

Earthquake near Hollister, CA

Yes: an earthquake was likely felt in Hollister in the last 24 hours. M 2.6, 21 km (13 mi) WNW of Hollister, at 11:40 am PST on 12 November 2026 (19:40 UTC); the estimated shaking in Hollister was intensity II (weak). Every earthquake near Hollister

This page: a magnitude 1.6 earthquake was recorded 27 km (17 mi) northeast of Hollister, CA, at 5:37 am PDT on 12 March 2018 (12:37 UTC), 1.7 km deep.

USGS: 27km NE of Hollister, CA

62 km (39 mi) ESE of San Jose, CA · 35 km (22 mi) E of Gilroy, CA

5:37 am PDT, Mar 12, 2018 · · 1.7 km deep · released about 9 lb of TNT

10 km30 km60 km120 km N Merced County 46 kmSan Benito County 47 kmSanta Clara County 49 kmStanislaus County 62 kmSanta Cruz County 72 kmMonterey County 88 kmAlameda County 94 kmSan Joaquin County 101 kmSan Mateo County 113 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
5:37 am PDT on 12 March 2018 ()
Where
27 km (17 mi) northeast of Hollister, CA · earthquakes near Hollister
Magnitude
M 1.6 (md)
Depth
1.7 km below the surface
Felt
no reports yet
Nearest
Merced County, 46 km ENE
Nearest mapped fault
Ortigalita fault, 5 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 3166 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 12 km (7 mi) from the epicentre. In Hollister, 27 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: Ridgemark.

How big was it?

This earthquake released about 9 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.6 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 1,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,200,000× the energy of this one
  3. Around the size people start to feel M 3.0 110× the energy of this one
  4. This earthquake M 1.6 about 9 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 25,000 times the energy of this one.

Before 2016, the USGS record lists 19 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.5 Near Morgan Hill, California · 40 km WNW of this epicentre
  2. 5.9 10 km SE of Tres Pinos, California · 33 km S of this epicentre
  3. 5.8 Near Watsonville, California · 46 km W of this epicentre
  4. 5.8 Near Paicines, California · 40 km S of this epicentre
  5. 5.8 The 1979 Coyote Lake, California Earthquake · 29 km WNW 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 37.0292, -121.1943. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Merced County, CA 46 km (28 mi) ENE earthquakes near Merced County
San Benito County, CA 47 km (29 mi) SSE earthquakes near San Benito County
Santa Clara County, CA 49 km (30 mi) WNW earthquakes near Santa Clara County
Stanislaus County, CA 62 km (38 mi) NNE earthquakes near Stanislaus County
Santa Cruz County, CA 72 km (45 mi) W earthquakes near Santa Cruz County
Monterey County, CA 88 km (55 mi) S earthquakes near Monterey County

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

Aftershocks so far

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

  1. 2.3 14km N of Morgan Hill, CA
  2. 1.9 12km NW of Pinnacles, CA
  3. 1.8 11km NNW of Hollister, CA
  4. 2.7 11km NNW of Hollister, CA
  5. 2.3 14km SSW of Westley, CA
  6. 1.6 14km SSW of Westley, CA
  7. 2.1 4km ESE of Aromas, CA
  8. 2.1 8km E of Gilroy, CA
  9. 2.4 8km E of Gilroy, CA
  10. 2.3 14km SW of Westley, CA
  11. 1.5 5km SSW of Ridgemark, CA
  12. 1.8 9km SSW of Tres Pinos, CA
  13. 2.4 10km NNW of Hollister, CA
  14. 1.8 8km WSW of Gilroy, CA
  15. 1.6 15km SSE 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

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