QuakeIndex

Earthquake · reviewed by a seismologist

M 6.3mww

106 km SSW of Barra de Navidad, Mexico

· 10 km deep · released about 43 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 6.3 (mww)
Depth
10 km below the surface
Felt
2 reports · strongest reported intensity III
Measured shaking
intensity IV (ShakeMap)
USGS impact alert
green
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 1613 days ago

This was a strong earthquake. Damage is likely near the epicentre and it is felt over a wide area. 2 people have reported feeling it to USGS.

How big was it?

This earthquake released about 43 kilotons of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 7.3 would have released about 32 times as much.

  1. Ridgecrest, California 2019 M 7.1 16× the energy of this one
  2. Loma Prieta, California 1989 M 6.9 7.9× the energy of this one
  3. Northridge, California 1994 M 6.7 4× the energy of this one
  4. This earthquake M 6.3 about 43 kilotons of TNT
  5. Mineral, Virginia 2011 M 5.8 this one released 5.6× more
  6. Magna, Utah 2020 M 5.7 this one released 7.9× 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.

For this area

The largest earthquake within 50 km in our catalogue was M 5.6 on 2016-05-07.

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 18.3637, -105.1731. Map © OpenStreetMap contributors.

Aftershocks so far

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

  1. 5.4 142 km SSW of Emiliano Zapata, Mexico
  2. 4.6 144 km SW of La Manzanilla, Mexico
  3. 4.5 145 km SSW of Emiliano Zapata, Mexico
  4. 4.6 126 km SSW of Emiliano Zapata, Mexico
  5. 4.4 149 km SW of Barra de Navidad, Mexico
  6. 4.2 132 km SSW of Barra de Navidad, Mexico
  7. 4.2 147 km SW of Barra de Navidad, Mexico
  8. 5.6 101 km SW of Barra de Navidad, Mexico
  9. 4.1 96 km SSW of El Naranjo, Mexico
  10. 4.1 94 km SW of Emiliano Zapata, Mexico
  11. 4.4 131 km SW of Barra de Navidad, Mexico
  12. 4.0 142 km SSW of Barra de Navidad, Mexico
  13. 4.4 89 km SSW of Emiliano Zapata, Mexico
  14. 4.5 117 km SSW of Barra de Navidad, Mexico
  15. 4.1 108 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.