M 7.4 earthquake – 3 km W of Huixtepec, Mexico
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Local time: Dec 23, 1937 · 07:18 (UTC-6)
MajorShallow · 25 km
Reviewed by a seismologist
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- Magnitude
- 7.4moment magnitude (mw)
- Depth
- 25 kmShallow earthquake
- Epicenter
- 16.656, -98.3388.0 km from Ometepec
- Energy released
- 1.9 megatons of TNTabout 127 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 6.9max. instrumental (MMI)
- Aftershocks
- 3M2.5+ within 127 km, up to 60 days
- Significance
- 842USGS score, 0–1,000+
The strongest here since 1931
The last earthquake at least as strong within 300 km struck on Jan 15, 1931.
How strong was it?
Major earthquake. It released 1.9 megatons of TNT, 3,981 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
3 earthquakes of M2.5+ within 127 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900, around Mexico.
- 8.0 15 km ESE of San Gabriel Mixtepec, Mexico Jun 17, 1928
- 7.8 2 km NW of Teojomulco, Mexico Apr 15, 1907
- 7.7 2 km ESE of San Agustín Loxicha, Mexico Nov 29, 1978
- 7.6 8 km ENE of Apantla, Mexico Jul 28, 1957
- 7.6 5 km SSW of San Miguel Suchixtepec, Mexico Jan 15, 1931
- 7.5 6 km WSW of San Miguel Panixtlahuaca, Mexico Oct 9, 1928
- 7.5 25 km S of Tetitlán, Mexico Dec 16, 1911
- 7.5 15 km W of San Baltazar Loxicha, Mexico Sep 30, 1999