QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2ml

86km ESE of Maneadero, B.C., MX

· 5.8 km deep · released about 28 tons of TNT

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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 4.2 (ml)
Depth
5.8 km below the surface
Felt
2 reports · strongest reported intensity II
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1095 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 28 tons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 5.2 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 6,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 270× the energy of this one
  3. Magna, Utah 2020 M 5.7 190× the energy of this one
  4. This earthquake M 4.2 about 28 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 59× more

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 31.5388, -115.6795. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.9 62 km ENE of San Vicente, Mexico
  2. 2.8 72 km E of San Vicente, Mexico
  3. 2.7 71 km ENE of San Vicente, Mexico
  4. 2.7 65 km WNW of San Felipe, Mexico
  5. 2.7 62 km ENE of San Vicente, Mexico
  6. 4.2 69 km ENE of San Vicente, Mexico
  7. 3.3 65 km ENE of San Vicente, Mexico
  8. 2.3 84 km E of Maneadero, B.C., MX
  9. 1.5 84 km E of Maneadero, B.C., MX
  10. 1.9 100 km ESE of Maneadero, B.C., MX
  11. 2.2 64 km E of Maneadero, B.C., MX
  12. 2.4 74 km E of Maneadero, B.C., MX
  13. 3.1 67 km NW of San Felipe, Mexico
  14. 2.6 75 km NW of San Felipe, Mexico
  15. 2.2 85 km ESE of Maneadero, 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.1 on 2020-08-17 — it released about 26 times the energy of this one.

From the QuakeIndex catalogue, built from the USGS FDSN event service.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.