M 6.9 earthquake – 106 km NW of Longgang, China
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Local time: Jul 18, 1969 · 13:24 (UTC+8)
StrongShallow · 12 km
Reviewed by a seismologist
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- Magnitude
- 6.9moment magnitude (mw)
- Depth
- 12 kmShallow earthquake
- Epicenter
- 38.370, 119.519107 km from Longgang
- Energy released
- 338 kilotons of TNTabout 23 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 6.2max. instrumental (MMI)
- Aftershocks
- 1M2.5+ within 64 km, up to 60 days
- Significance
- 732USGS 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?
Strong earthquake. It released 338 kilotons of TNT, 708 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
1 earthquakes of M2.5+ within 64 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900, around China.
- 7.5 17 km NE of Penguanzhuang, China Jul 27, 1976
- 7.4 6 km SW of Linxi, China Jul 28, 1976
- 6.3 27 km SW of Changli, China Sep 23, 1945
- 6.3 5 km ENE of Gaojingzhuang, China Nov 15, 1976
- 6.3 35 km SSE of Pulandian, China Oct 2, 1945
- 6.2 5 km ESE of Laizhou, China Jan 10, 1907
- 6.2 24 km NNW of Weihai, China May 23, 1948
- 6.1 28 km NW of Cangzhou, China Mar 27, 1967