QuakeIndex

Earthquake · reviewed by a seismologist

M 1.5ml

Earthquake near Ramona, CA

No earthquake was likely felt in Ramona in the 24 hours to 11:08 am PST (19:08 UTC). The last one was M 4.9, 172 km (107 mi) ESE, at 10:27 am PST on 3 November 2026, estimated intensity II (weak) in town; 321 felt reports to USGS. Every earthquake near Ramona

This page: a magnitude 1.5 earthquake was recorded 48 km (30 mi) east of Ramona, CA, at 5:00 pm PDT on 7 October 2022 (00:00 UTC), 13 km deep.

USGS: 23km WSW of Ocotillo Wells, CA

77 km (48 mi) ENE of San Diego, CA

5:00 pm PDT, Oct 7, 2022 · · 13 km deep · released about 5.4 lb of TNT

Every earthquake near Ramona Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 39 kmRiverside County 83 kmImperial County 93 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
5:00 pm PDT on 7 October 2022 ()
Where
48 km (30 mi) east of Ramona, CA · earthquakes near Ramona
Magnitude
M 1.5 (ml)
Depth
13 km below the surface
Felt
no reports yet
Nearest
San Diego County, 39 km W
Nearest mapped fault
Elsinore fault, 1 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 1494 days ago

This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

At this magnitude and depth it was probably too small to be felt, even directly above it. In Ramona, 48 km away, the estimate is intensity I (not felt). 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: Julian, Borrego Springs, Pine Valley.

How big was it?

This earthquake released about 5.4 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 2,800,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 2,000,000× the energy of this one
  3. Around the size people start to feel M 3.0 180× the energy of this one
  4. This earthquake M 1.5 about 5.4 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 5.2 on 2016-06-10 — about 340,000 times the energy of this one.

Before 2016, the USGS record lists 14 earthquakes of M5 or more within 50 km; the five largest:

  1. 6.6 The 1968 Borrego Mountain, California Earthquake · 28 km ENE of this epicentre
  2. 6.6 The 1987 Superstition Hills, California Earthquake · 47 km E of this epicentre
  3. 6.4 The 1954 San Jacinto Fault, California Earthquake · 38 km NE of this epicentre
  4. 6.0 16km WSW of Oasis, CA · 41 km NNE of this epicentre
  5. 5.7 Eastern San Diego County, California · 29 km NE 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 33.0445, -116.3532. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Diego County, CA 39 km (25 mi) W earthquakes near San Diego County
Riverside County, CA 83 km (51 mi) NNE earthquakes near Riverside County
Imperial County, CA 93 km (58 mi) E earthquakes near Imperial County

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

Aftershocks so far

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

  1. 1.6 28km SSW of Ocotillo Wells, CA
  2. 2.1 5km WNW of Borrego Springs, CA
  3. 1.7 3km SSE of Lake Henshaw, CA
  4. 1.6 11km E of Ocotillo Wells, CA
  5. 2.6 11km E of Ocotillo Wells, CA
  6. 1.7 11km ENE of Ocotillo Wells, CA
  7. 2.0 16km E of Ocotillo Wells, CA
  8. 1.8 12km NNW of Ocotillo, CA
  9. 2.0 24km WSW of Westmorland, CA
  10. 1.7 9km SE of Ocotillo Wells, CA
  11. 1.8 9km SE of Ocotillo Wells, CA
  12. 1.5 12km WSW of Salton City, CA
  13. 1.6 25km ENE of Pine Valley, CA
  14. 1.8 25km ENE of Pine Valley, CA
  15. 2.6 20km N of Ocotillo, 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.