QuakeIndex

Earthquake · reviewed by a seismologist

M 6.2mww

28 km SW of Las Brisas, Mexico

· 10 km deep · released about 30 kilotons 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 6.2 (mww)
Depth
10 km below the surface
Felt
438 reports · strongest reported intensity VII
Measured shaking
intensity VII (ShakeMap)
USGS impact alert
green
Tsunami
USGS flagged this event for tsunami evaluation. Follow tsunami.gov for official messages.
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1277 days ago

This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area. 438 people have reported feeling it to USGS.

How big was it?

This earthquake released about 30 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.2 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 22× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 11× the energy of this one
  3. Northridge, California 1994 M 6.7 5.6× the energy of this one
  4. This earthquake M 6.2 about 30 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 4× more
  6. Magna, Utah 2020 M 5.7 this one released 5.6× 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 30.7936, -116.3907. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 2.5 28 km SW of San Vicente, Mexico
  2. 2.9 63 km SSE of Maneadero, B.C., MX
  3. 2.7 46 km W of Las Brisas, Mexico
  4. 3.1 73 km S of Maneadero, B.C., MX
  5. 3.3 67 km S of Maneadero, B.C., MX
  6. 3.4 2 km SE of Las Brisas, Mexico
  7. 3.6 72km S of Maneadero, B.C., MX
  8. 4.3 13 km W of Las Brisas, Mexico
  9. 4.5 24 km W of Las Brisas, Mexico
  10. 3.9 66km S of Maneadero, B.C., MX
  11. 4.4 24 km WSW of Las Brisas, Mexico
  12. 2.9 17 km WSW of Camalú, Mexico
  13. 4.3 31 km SW of Las Brisas, Mexico
  14. 4.3 31 km W of Las Brisas, Mexico
  15. 4.5 30 km W of Las Brisas, Mexico

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.