M 8.5 earthquake – 1963 Kuril Islands Earthquake
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Local time: Oct 13, 1963 · 14:17 (UTC+9)
GreatShallow · 35 km
Reviewed by a seismologist
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- Magnitude
- 8.5moment magnitude (mw)
- Depth
- 35 kmShallow earthquake
- Epicenter
- 44.872, 149.483357 km from Nemuro
- Energy released
- 85 megatons of TNTabout 5,653 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 6.8max. instrumental (MMI)
- Aftershocks
- 31M2.5+ within 500 km, up to 60 days
- Significance
- 1,112USGS 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 85 megatons of TNT, 177,828 times the energy of a magnitude 5.0. Bars use the magnitude scale: every step is about 32 times more energy.
Aftershocks
31 earthquakes of M2.5+ within 500 km in the 60 days after.
- 6.0 203 km ESE of Kuril’sk, Russia Oct 13, 1963
- 6.1 214 km E of Kuril’sk, Russia Oct 13, 1963
- 6.2 233 km ESE of Kuril’sk, Russia Oct 13, 1963
- 5.6 Kuril Islands Oct 13, 1963
- 5.7 east of the Kuril Islands Oct 13, 1963
- 6.2 227 km ESE of Kuril’sk, Russia Oct 13, 1963
- 6.0 230 km ESE of Kuril’sk, Russia Oct 14, 1963
- 6.1 250 km ESE of Kuril’sk, Russia Oct 14, 1963
- 5.9 266 km E of Kuril’sk, Russia Oct 15, 1963
- 6.2 116 km SE of Kuril’sk, Russia Oct 17, 1963
The strongest earthquakes within 300 km
Since 1900.
- 8.3 48 km E of Shikotan, Russia Oct 4, 1994
- 8.3 1958 Kuril Islands Earthquake Nov 6, 1958
- 8.2 1969 Hokkaido Toho-oki Earthquake Aug 11, 1969
- 8.1 1918 Kuril Islands Earthquake Sep 7, 1918
- 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
- 7.6 248 km E of Kuril’sk, Russia Dec 22, 1991
In the week before
Earthquakes within 500 km in the 7 days before this one: possible foreshocks.