QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1md

Earthquake near Hollister, CA

Yes: an earthquake was likely felt in Hollister in the last 24 hours. M 2.0, 14 km (9 mi) WSW of Hollister, at 2:11 am PST on 11 November 2026 (10:11 UTC); the estimated shaking in Hollister was intensity II (weak). Every earthquake near Hollister

This page: a magnitude 2.1 earthquake was recorded 42 km (26 mi) southeast of Hollister, CA, at 6:18 pm PDT on 9 May 2018 (01:18 UTC), 13 km deep. 1 person has reported feeling it to USGS.

USGS: 16km NE of Pinnacles, CA

55 km (34 mi) E of Salinas, CA · 102 km (63 mi) SE of San Jose, CA

6:18 pm PDT, May 9, 2018 · · 13 km deep · released about 47 lb of TNT

10 km30 km60 km120 km N San Benito County 6 kmMonterey County 51 kmMerced County 68 kmSanta Clara County 88 kmSanta Cruz County 97 kmStanislaus County 103 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
6:18 pm PDT on 9 May 2018 ()
Where
42 km (26 mi) southeast of Hollister, CA · earthquakes near Hollister
Magnitude
M 2.1 (md)
Depth
13 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Benito County, 6 km WSW
Nearest mapped fault
San Andreas fault, 14 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 3107 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, 42 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.

How big was it?

This earthquake released about 47 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.1 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 320,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 230,000× the energy of this one
  3. Around the size people start to feel M 3.0 20× the energy of this one
  4. This earthquake M 2.1 about 47 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 4,700 times the energy of this one.

Before 2016, the USGS record lists 15 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.1 Northwest of Huron, California · 41 km ESE of this epicentre
  2. 5.9 10 km SE of Tres Pinos, California · 21 km WNW of this epicentre
  3. 5.8 Near Paicines, California · 21 km WNW of this epicentre
  4. 5.8 29 km NE of San Lucas, California · 43 km SSE of this epicentre
  5. 5.5 7 km SW of Hollister, California · 42 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 36.6323, -121.0237. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Benito County, CA 6 km (4 mi) WSW earthquakes near San Benito County
Monterey County, CA 51 km (32 mi) SSW earthquakes near Monterey County
Merced County, CA 68 km (42 mi) NNE earthquakes near Merced County
Santa Clara County, CA 88 km (55 mi) NW earthquakes near Santa Clara County
Santa Cruz County, CA 97 km (60 mi) WNW earthquakes near Santa Cruz County
Stanislaus County, CA 103 km (64 mi) N earthquakes near Stanislaus County

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

Aftershocks so far

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

  1. 1.8 7km SE of Pinnacles, CA
  2. 2.6 6km ENE of Pinnacles, CA
  3. 2.0 16km NW of Pinnacles, CA
  4. 1.8 16km NW of Pinnacles, CA
  5. 2.1 16km NW of Pinnacles, CA
  6. 1.6 10km NW of Pinnacles, CA
  7. 2.8 6km SE of Tres Pinos, CA
  8. 3.1 15km ESE of Pinnacles, CA
  9. 1.8 15km NW of Pinnacles, CA
  10. 1.5 22km NE of San Lucas, CA
  11. 1.7 22km ENE of San Lucas, CA
  12. 1.5 22km ENE of San Lucas, CA
  13. 1.7 17km SE of Pinnacles, CA
  14. 1.7 20km SW of New Idria, CA
  15. 1.8 8km E of Chualar, 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.