QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Rancho Palos Verdes, CA

No earthquake was likely felt in Rancho Palos Verdes in the 24 hours to 11:06 pm PST (07:06 UTC). The last one was M 3.2, 19 km (12 mi) ENE, at 12:44 am PDT on 9 October 2026, estimated intensity II (weak) in town; 1,090 felt reports to USGS. Every earthquake near Rancho Palos Verdes

This page: a magnitude 1.5 earthquake was recorded 4 km (2 mi) southeast of Rancho Palos Verdes, CA, at 5:28 am PDT on 23 July 2018 (12:28 UTC), 4.8 km deep.

USGS: 4km SE of Rancho Palos Verdes, CA

12 km (7 mi) S of Torrance, CA · 33 km (21 mi) S of Los Angeles, CA

5:28 am PDT, Jul 23, 2018 · · 4.8 km deep · released about 5.6 lb of TNT

10 km30 km60 km120 km N Los Angeles County 53 kmOrange County 54 kmVentura County 101 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
5:28 am PDT on 23 July 2018 ()
Where
4 km (2 mi) southeast of Rancho Palos Verdes, CA · earthquakes near Rancho Palos Verdes
Magnitude
M 1.5 (ml)
Depth
4.8 km below the surface
Felt
no reports yet
Nearest
Los Angeles County, 53 km N
Nearest mapped fault
Palos Verdes 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 3034 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 9 km (6 mi) from the epicentre. In Rancho Palos Verdes, 4 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: Rancho Palos Verdes 4 km, intensity II. Estimated for each town centre; each link is that town's own record.

How big was it?

This earthquake released about 5.6 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.5 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 2,700,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 1,900,000× the energy of this one
  3. Around the size people start to feel M 3.0 170× the energy of this one
  4. This earthquake M 1.5 about 5.6 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 11 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.4 The 1933 Long Beach, California Earthquake · 35 km ESE of this epicentre
  2. 5.9 The 1987 Whittier Narrows, California Earthquake · 45 km NE of this epicentre
  3. 5.3 2 km SSW of Santa Monica, California · 34 km NNW of this epicentre
  4. 5.3 7km W of Newport Beach, CA · 35 km ESE of this epicentre
  5. 5.2 1 km SW of Las Flores, California · 43 km NW 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 33.7228, -118.3555. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
Los Angeles County, CA 53 km (33 mi) N earthquakes near Los Angeles County
Orange County, CA 54 km (33 mi) E earthquakes near Orange County
Ventura County, CA 101 km (63 mi) NW earthquakes near Ventura 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. 1.5 7km ESE of San Pedro, CA
  2. 1.8 6km SW of Sherman Oaks, CA
  3. 2.0 2km E of Santa Monica, CA
  4. 2.6 2km ESE of Santa Monica, CA
  5. 1.6 11km WSW of Newport Beach, CA
  6. 1.6 4km NNW of Signal Hill, CA
  7. 1.6 15km S of Las Flores, CA
  8. 1.6 2km NNW of Willowbrook, CA
  9. 1.5 2km NE of Whittier, CA
  10. 1.8 1km E of Baldwin Hills, CA
  11. 1.8 2km W of El Segundo, CA
  12. 1.9 1km N of Lawndale, CA
  13. 2.0 4km SSW of La Mirada, CA
  14. 2.3 3km SW of La Mirada, CA
  15. 1.6 4km SW of Baldwin Hills, 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.