QuakeIndex

Earthquake · reviewed by a seismologist

M 3.6mw

Earthquake near Salinas, CA

No earthquake was likely felt in Salinas in the 24 hours to 4:36 am PST (12:36 UTC). The last one was M 2.7, 18 km (11 mi) ENE, at 5:38 am PDT on 29 October 2026, estimated intensity II (weak) in town; 3 felt reports to USGS. Every earthquake near Salinas

This page: a magnitude 3.6 earthquake was recorded 36 km (22 mi) east of Salinas, CA, at 7:54 am PDT on 17 October 2019 (14:54 UTC), 9.6 km deep. 139 people have reported feeling it to USGS.

USGS: 16km NW of Pinnacles, CA

88 km (55 mi) SE of San Jose, CA · 34 km (21 mi) E of Salinas, CA

7:54 am PDT, Oct 17, 2019 · · 9.6 km deep · released about 3.3 tons of TNT

10 km30 km60 km120 km N San Benito County 16 kmMonterey County 45 kmSanta Clara County 75 kmMerced County 78 kmSanta Cruz County 79 kmStanislaus County 105 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
7:54 am PDT on 17 October 2019 ()
Where
36 km (22 mi) east of Salinas, CA · earthquakes near Salinas
Magnitude
M 3.6 (mw)
Depth
9.6 km below the surface
Felt
139 reports · strongest reported intensity III
Measured shaking
intensity V (ShakeMap)
Nearest
San Benito County, 16 km E
Nearest mapped fault
San Andreas fault, 2 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 2505 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 66 km (41 mi) from the epicentre. In Salinas, 36 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.

Likely felt in: Soledad 25 km, intensity III · Hollister 27 km, intensity II · Greenfield 35 km, intensity II · Salinas 36 km, intensity II · Prunedale 40 km, intensity II · King City 49 km, intensity II · Gilroy 49 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 3.3 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.6 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 51,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 2,300× the energy of this one
  3. Magna, Utah 2020 M 5.7 1,600× the energy of this one
  4. This earthquake M 3.6 about 3.3 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 6.9× more

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 4.7 on 2019-10-15 — about 53 times the energy of this one.

Before 2016, the USGS record lists 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 5.9 10 km SE of Tres Pinos, California · 11 km NNE of this epicentre
  2. 5.8 Near Paicines, California · 4 km NNE of this epicentre
  3. 5.5 7 km SW of Hollister, California · 25 km NW of this epicentre
  4. 5.5 12 km S of Tres Pinos, California · 6 km NW of this epicentre
  5. 5.5 3 km ENE of Tres Pinos, California · 19 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 36.6390, -121.2578. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Benito County, CA 16 km (10 mi) E earthquakes near San Benito County
Monterey County, CA 45 km (28 mi) S earthquakes near Monterey County
Santa Clara County, CA 75 km (47 mi) NNW earthquakes near Santa Clara County
Merced County, CA 78 km (48 mi) NE earthquakes near Merced County
Santa Cruz County, CA 79 km (49 mi) WNW earthquakes near Santa Cruz County
Stanislaus County, CA 105 km (65 mi) NNE earthquakes near Stanislaus 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 2km NNW of Hollister, CA
  2. 2.3 4km W of San Juan Bautista, CA
  3. 1.6 18km E of Pinnacles, CA
  4. 1.5 11km NW of Pinnacles, CA
  5. 1.9 14km SSE of Tres Pinos, CA
  6. 1.7 14km SSE of Tres Pinos, CA
  7. 2.1 14km S of Tres Pinos, CA
  8. 1.7 23km SSW of Los Banos, CA
  9. 2.2 16km SSE of Tres Pinos, CA
  10. 1.6 6km NE of Pinnacles, CA
  11. 1.6 14km SSE of Tres Pinos, CA
  12. 2.2 14km SSE of Tres Pinos, CA
  13. 2.4 9km NW of Pinnacles, CA
  14. 1.5 12km S of Tres Pinos, CA
  15. 1.9 19km ENE of Pinnacles, 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.