QuakeIndex

Earthquake · reviewed by a seismologist

M 1.9ml

21km S of Primo Tapia, B.C., MX

Yes. A magnitude 1.9 earthquake was recorded 21km S of Primo Tapia, B.C., MX, 89 km (56 mi) SSE of San Diego, CA, at 4:10 pm PST on 11 January 2019 (00:10 UTC), 12 km deep. 1 person has reported feeling it to USGS.

89 km (56 mi) SSE of San Diego, CA

· 12 km deep · released about 18 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N San Diego County 111 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
Magnitude
M 1.9 (ml)
Depth
12 km below the surface
Felt
1 report · strongest reported intensity II
Nearest
San Diego County, 111 km N
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2859 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 7 km (4 mi) from the epicentre. 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.

How big was it?

This earthquake released about 18 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 2.9 would have released about 32 times as much.

  1. Mineral, Virginia 2011 M 5.8 840,000× the energy of this one
  2. Magna, Utah 2020 M 5.7 600,000× the energy of this one
  3. Around the size people start to feel M 3.0 53× the energy of this one
  4. This earthquake M 1.9 about 18 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.

Where

Epicentre 32.0302, -116.9252. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection from the epicentre
San Diego County, CA 111 km (69 mi) N earthquakes near San Diego County

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

Aftershocks so far

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

  1. 2.5 5km WSW of Primo Tapia, B.C., MX
  2. 2.5 46km SW of El Sauzal, B.C., MX
  3. 1.6 22km ESE of Primo Tapia, B.C., MX
  4. 1.9 24km ESE of Primo Tapia, B.C., MX
  5. 2.2 42km WSW of Rosarito, B.C., MX
  6. 2.3 48km SW of Rosarito, B.C., MX
  7. 2.0 32km NE of Ensenada, B.C., MX
  8. 2.1 30km W of El Sauzal, B.C., MX
  9. 1.9 35km NNE of Ensenada, B.C., MX
  10. 2.1 24km NNE of Ensenada, B.C., MX
  11. 1.6 25km ESE of Primo Tapia, B.C., MX
  12. 2.1 12km NW of El Sauzal, B.C., MX
  13. 2.9 15km WNW of El Sauzal, B.C., MX
  14. 2.6 36km W of El Sauzal, B.C., MX
  15. 2.0 8km WNW of Primo Tapia, B.C., MX

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.