QuakeIndex

Earthquake · reviewed by a seismologist

M 2.1ml

Earthquake near Encinitas, CA

USGS: 25km WSW of Encinitas, CA

40 km (25 mi) WNW of San Diego, CA · 28 km (17 mi) WSW of Encinitas, CA

6:08 pm PDT, Jul 27, 2018 · · 17 km deep · released about 41 lb of TNT

Every earthquake near Encinitas Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 71 kmOrange County 84 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
6:08 pm PDT on 27 July 2018 ()
Where
25 km (15 mi) WSW of Encinitas, CA · earthquakes near Encinitas
Magnitude
M 2.1 (ml)
Depth
17 km below the surface
Felt
1 report · strongest reported intensity III
Nearest
San Diego County, 71 km E
Nearest mapped fault
Carlsbad 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 2986 days ago

A magnitude 2.1 earthquake was recorded 25 km (15 mi) WSW of Encinitas, CA, at 6:08 pm PDT on 27 July 2018 (01:08 UTC). 1 person has reported feeling it to USGS. This was a minor earthquake. Quakes this small are rarely felt and do not cause damage.

Earthquakes near other towns within 30 km: Solana Beach, Del Mar, Carlsbad.

How big was it?

This earthquake released about 41 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 5.8 370,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 260,000× the energy of this one
  3. Around the size people start to feel M 3.0 23× the energy of this one
  4. This earthquake M 2.1 about 41 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 one earthquake of M5 or more within 50 km:

  1. 5.5 The 1986 Oceanside, California Earthquake · 32 km W 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 32.9465, -117.5337. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Diego County, CA 71 km (44 mi) E earthquakes near San Diego County
Orange County, CA 84 km (52 mi) NNW earthquakes near Orange County

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

Aftershocks so far

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

  1. 2.1 49km WSW of Carlsbad, CA
  2. 3.2 26km WSW of Encinitas, CA
  3. 2.1 41km WSW of Carlsbad, CA
  4. 2.0 49km WSW of Encinitas, CA
  5. 2.2 16km SW of La Jolla, CA
  6. 1.8 49km WSW of Carlsbad, CA
  7. 1.7 3km ESE of La Jolla, CA
  8. 2.4 17km SW of La Jolla, CA
  9. 1.7 12km WSW of Coronado, CA
  10. 2.2 4km WSW of Solana Beach, CA
  11. 1.7 16km W of Coronado, CA
  12. 1.9 16km WSW of La Jolla, CA
  13. 1.7 28km SSW of San Clemente, CA
  14. 1.6 16km SW of La Jolla, CA
  15. 3.0 41km WSW of Camp Pendleton South, 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.