Which of the following statements regarding the seismotectonics of Sikkim is/are correct?
1. The Tista Lineament is a major transverse fault in the eastern Himalayas known to generate strike-slip earthquakes.
2. Under the latest updated Bureau of Indian Standards (BIS) seismic zonation map, Sikkim is classified under Seismic Zone V.

Question

Accepted Answer

1 only — Statement 1 is correct; the Tista Lineament is a NW-SE trending transverse fault responsible for significant seismicity in Sikkim. Statement 2 is incorrect; under the recent BIS IS 1893 update, Sikkim and the broader Himalayan arc were upgraded from Zone IV to a newly created highest-risk Seismic Zone VI.

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