M 8.1 earthquake – 1918 Kuril Islands Earthquake
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Local time: Sep 8, 1918 · 02:16 (UTC+9)
GreatShallow · 15 km
Reviewed by a seismologist
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- Magnitude
- 8.1moment magnitude (mw)
- Depth
- 15 kmShallow earthquake
- Epicenter
- 44.998, 152.320570 km from Nemuro
- Energy released
- 21 megatons of TNTabout 1,420 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 6.4max. instrumental (MMI)
- Aftershocks
- 3M2.5+ within 327 km, up to 60 days
- Significance
- 1,009USGS 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?
Great earthquake. It released 21 megatons of TNT, 44,668 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 327 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900.
- 8.5 1963 Kuril Islands Earthquake Oct 13, 1963
- 8.3 2006 Kuril Islands Earthquake Nov 15, 2006
- 8.1 2007 Kuril Islands Earthquake Jan 13, 2007
- 7.9 128 km ESE of Kuril’sk, Russia Dec 3, 1995
- 7.8 east of the Kuril Islands Nov 8, 1918
- 7.8 217 km ESE of Kuril’sk, Russia Oct 20, 1963
- 7.7 east of the Kuril Islands Mar 16, 1963
- 7.6 248 km E of Kuril’sk, Russia Dec 22, 1991