QuakeIndex

Earthquake · reviewed by a seismologist

M 2.7ml

Earthquake near Santa Clarita, CA

No earthquake was likely felt in Santa Clarita in the 24 hours to 6:21 pm PST (02:21 UTC). The last one was M 2.3, 16 km (10 mi) SSW, at 9:45 am PST on 7 November 2026, estimated intensity II (weak) in town; 26 felt reports to USGS. Every earthquake near Santa Clarita

This page: a magnitude 2.7 earthquake was recorded 9 km (5 mi) northeast of Santa Clarita, CA, at 5:30 pm PDT on 2 September 2019 (00:30 UTC), 18 km deep. 23 people have reported feeling it to USGS.

USGS: 4km NNE of Santa Clarita, CA

in Santa Clarita, CA · 49 km (30 mi) N of Los Angeles, CA

5:30 pm PDT, Sep 2, 2019 · · 18 km deep · released about 350 lb of TNT

Every earthquake near Santa Clarita Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Los Angeles County 35 kmVentura County 60 kmKern County 102 kmOrange County 108 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
5:30 pm PDT on 2 September 2019 ()
Where
9 km (5 mi) northeast of Santa Clarita, CA · earthquakes near Santa Clarita
Magnitude
M 2.7 (ml)
Depth
18 km below the surface
Felt
23 reports · strongest reported intensity IV
Nearest
Los Angeles County, 35 km SE
Nearest mapped fault
San Gabriel fault, 6 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 758 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 18 km (11 mi) from the epicentre. In Santa Clarita, 9 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: Santa Clarita 9 km, intensity II · Valencia 11 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 350 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 3.7 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 43,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 31,000× the energy of this one
  3. Around the size people start to feel M 3.0 2.7× the energy of this one
  4. This earthquake M 2.7 about 350 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 18 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.7 Northridge, California, earthquake · 27 km S of this epicentre
  2. 6.6 1971 San Fernando Earthquake, California · 11 km ESE of this epicentre
  3. 5.9 1km ENE of Granada Hills, California · 20 km S of this epicentre
  4. 5.8 10km SSW of Agua Dulce, CA · 11 km ESE of this epicentre
  5. 5.8 10km SSW of Agua Dulce, CA · 11 km ESE 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 34.4532, -118.4865. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 35 km (22 mi) SE earthquakes near Los Angeles County
Ventura County, CA 60 km (37 mi) W earthquakes near Ventura County
Kern County, CA 102 km (63 mi) NNW earthquakes near Kern County
Orange County, CA 108 km (67 mi) SE earthquakes near Orange County

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

Aftershocks so far

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

  1. 1.6 14km N of Castaic, CA
  2. 2.5 7km WNW of Lake Hughes, CA
  3. 2.0 4km W of Culver City, CA
  4. 1.5 18km SSW of Gorman, CA
  5. 2.3 8 km SW of Green Valley, California
  6. 1.7 2km SSE of Castaic, CA
  7. 2.4 13km N of Piru, CA
  8. 1.9 2km ENE of Northridge, CA
  9. 1.6 14km N of Castaic, CA
  10. 1.5 14km N of Castaic, CA
  11. 2.2 14km N of Castaic, CA
  12. 2.9 1km W of Chatsworth, CA
  13. 3.1 1km NW of Chatsworth, CA
  14. 1.8 9km NE of Piru, CA
  15. 1.5 3km W of Highland Park, 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.