M 6.8 earthquake – 32 km E of Uttarkāshi, India
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Local time: Oct 20, 1991 · 02:53 (UTC+5:30)
StrongShallow · 10 km
Reviewed by a seismologist
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- Magnitude
- 6.8moment magnitude (mwb)
- Depth
- 10 kmShallow earthquake
- Epicenter
- 30.780, 78.77432 km from Uttarkāshi
- Energy released
- 239 kilotons of TNTabout 16 × Hiroshima
- Felt reports
- —"Did You Feel It?" responses
- Shaking intensity
- 8.2max. instrumental (MMI)
- Aftershocks
- 3M2.5+ within 56 km, up to 60 days
- Significance
- 711USGS score, 0–1,000+
The strongest here since 1975
The last earthquake at least as strong within 300 km struck on Jan 19, 1975.
How strong was it?
Strong earthquake. It released 239 kilotons of TNT, 501 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 56 km in the 60 days after.
The strongest earthquakes within 300 km
Since 1900, around India.
- 7.9 The 1905 Kangra, India Earthquake Apr 4, 1905
- 7.0 21 km SE of Dārchulā, Nepal Aug 28, 1916
- 6.8 136 km ENE of Kulu, India Jan 19, 1975
- 6.7 115 km SSE of Gar, China Mar 6, 1966
- 6.6 37 km ESE of Dārchulā, Nepal Jun 27, 1966
- 6.6 10 km W of Dera Gopipur, India Feb 27, 1906
- 6.6 68 km ENE of Srīnagar, India Mar 28, 1999
- 6.6 131 km N of Dārchulā, Nepal Oct 14, 1911