QuakeIndex

Earthquake · reviewed by a seismologist

M 4.2mb

83 km SW of Barra de Navidad, Mexico

· 25 km deep · released about 30 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 (mb)
Depth
25 km below the surface
Felt
no reports yet
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 3786 days ago

This was a light earthquake. It is usually felt clearly nearby and can rattle windows and dishes, but damage is uncommon.

How big was it?

This earthquake released about 30 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 5,600× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 250× the energy of this one
  3. Magna, Utah 2020 M 5.7 180× the energy of this one
  4. This earthquake M 4.2 about 30 tons of TNT
  5. Around the size people start to feel M 3.0 this one released 63× 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 18.6119, -105.1677. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 5.6 101 km SW of Barra de Navidad, Mexico
  2. 4.1 94 km SW of Emiliano Zapata, Mexico
  3. 4.4 131 km SW of Barra de Navidad, Mexico
  4. 4.7 62 km SW of Emiliano Zapata, Mexico
  5. 5.9 43 km SSW of Emiliano Zapata, Mexico
  6. 4.4 89 km SSW of Emiliano Zapata, Mexico
  7. 4.5 117 km SSW of Barra de Navidad, Mexico
  8. 4.1 108 km SSW of Barra de Navidad, Mexico
  9. 5.5 95 km SW of Barra de Navidad, Mexico
  10. 6.3 106 km SSW of Barra de Navidad, Mexico
  11. 4.0 125 km SW of Barra de Navidad, Mexico
  12. 4.0 130 km SW of Barra de Navidad, Mexico
  13. 4.1 96 km SSW of Barra de Navidad, Mexico
  14. 4.9 103 km SW of Barra de Navidad, Mexico
  15. 4.4 105 km SSW of Barra de Navidad, 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.