New Delhi, Feb. 2 :    New Delhi, Feb. 2:  Calcutta is safe, but residents of neighbouring South 24-Parganas beware. The Indian Meteorological Department (IMD) today warned that the district is more prone to seismic activity than other areas in West Bengal. The department has divided the country into five seismic zones. West Bengal falls between categories three and four, that is, between the moderate and high-damage risk zones. V.S. Ramamurthy, secretary, science and technology, said the met department is yet to carry out a comprehensive seismic study of Calcutta as it is not on its priority list, while Delhi is. The Kutch, Himalayan foothills, the Northeast and the Andaman and Nicobar islands fall in the very high-risk Zone V. Delhi comes next in the high-risk Zone IV. The IMD has prepared the seismic map in collaboration with the Bureau of Indian Standards and Building Materials and Technology Promotion Council under the urban development ministry.