M 7.9 earthquake – The 1906 San Francisco, California Earthquake
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Local time: Apr 18, 1906 · 05:12 (UTC-8)
MajorShallow · 12 km
Reviewed by a seismologist
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- Magnitude
- 7.9moment magnitude (mw)
- Depth
- 12 kmShallow earthquake
- Epicenter
- 37.750, -122.5509.0 km from Daly City
- Energy released
- 11 megatons of TNTabout 712 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 9.0max. instrumental (MMI)
- Aftershocks
- 0M2.5+ within 250 km
- Significance
- 960USGS score, 0–1,000+
The strongest within 300 km on record
No earthquake this strong has been recorded this close since our catalog begins in 1900.
How strong was it?
Major earthquake. It released 11 megatons of TNT, 22,387 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
The strongest earthquakes within 300 km
Since 1900, around United States.
- 6.9 The 1989 Loma Prieta, California Earthquake Oct 18, 1989
- 6.7 The 1983 Coalinga, California Earthquake May 2, 1983
- 6.5 10 km NE of San Simeon, California Dec 22, 2003
- 6.4 Near Morgan Hill, California Jul 1, 1911
- 6.4 1901 Parkfield, California Earthquake Mar 3, 1901
- 6.3 22 km S of Davenport, California Oct 22, 1926
- 6.3 16 km SW of Davenport, California Oct 22, 1926
- 6.2 The 1984 Morgan Hill, California Earthquake Apr 24, 1984