1967 Koynanagar earthquake

1967 Koynanagar earthquake
UTC time 1967-12-10 22:51:23
ISC event 828259
USGS-ANSS ComCat
Local date 11 December 1967 (1967-12-11)
Local time 04:21
Magnitude 6.6 Mw [1]
Depth 15 km (9 mi) [1]
Epicenter 17°25′N 73°52′E / 17.41°N 73.86°E / 17.41; 73.86Coordinates: 17°25′N 73°52′E / 17.41°N 73.86°E / 17.41; 73.86 [1]
Areas affected India
Total damage $400,000 [2]
Max. intensity VIII (Severe) [3]
Casualties 177–180 dead [2]
2,272 injured [2]

The 1967 Koynanagar earthquake occurred near Koynanagar town in Maharashtra, India on 11 December local time. The magnitude 6.6 shock hit with a maximum Mercalli intensity of VIII (Severe). It occurred near the site of Koyna dam, raising questions about induced seismicity, and claimed at least 177 lives and injured over 2,200.

Damage

More than 80% of the houses were damaged in Koyana Nagar Township,[4] but it did not cause any major damage to the dam except some cracks which were quickly repaired. There have been several earthquakes of smaller magnitude there since 1967. The deadly earthquake caused a 10–15 cm (3.9–5.9 in) fissure in the ground which spread over a length of 25 kilometers (16 mi). Some geologists believe that the earthquake was due to reservoir-triggered seismic activity,[4] but senior project officials have repeatedly denied this conclusion.[5]

See also

References

  1. 1 2 3 ISC (2016), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2012), Version 3.0, International Seismological Centre
  2. 1 2 3 USGS (September 4, 2009), PAGER-CAT Earthquake Catalog, Version 2008_06.1, United States Geological Survey
  3. ↑ National Geophysical Data Center / World Data Service (NGDC/WDS), Significant Earthquake Database, National Geophysical Data Center, NOAA, doi:10.7289/V5TD9V7K
  4. 1 2 Rajesh Menon (October 3, 2005). "Tremors may rock Koyna for another two decades". The Indian Express. Archived from the original on 2007-11-17. Retrieved 2009-01-05.
  5. ↑ Vishwas Kothari (15 March 2011). "Koyna to be epicentre of global study". The Times of India.


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