Abstract
VALUABLE seismological data is contained in the Seismological Bulletin of the Government of India Meteorological Department for the period January–March 1940, published under the direction of Dr. C. W. B. Normand. Interpretations of the seismo–grams obtained at the observatories at Agra, Bombay, Calcutta, Colombo, Dehra Dun, Hyderabad and Kodaikanal are given in considerable detail, and it is pleasing to note that J. H. Sil at Poona has again collected non–instrumental reports from voluntary observers. At the Upper Air Observatory at Agra, ninety–four earthquakes and tremors were recorded instrumentally during the quarter, and in each case there are given the type of wave with its arrival time, occasionally its period and amplitude, together with the estimated epicentral distance and depth of focus. The deepest focus shock recorded was apparently one approximately 200 km. deep estimated by the Brunner Chart, on March 28, at an estimated epicentral distance of 4,135 km. The other observatory reports are along similar lines. Fifteen earthquakes were recorded by voluntary observers. Three of these reached intensity 7 on the Rossi–Forel scale. These were at Srinagar on January 26, Gauhati on February 13 and Drosh on March 19, the latter also being recorded with lesser intensities at Kabul, Peshawar and Srinagar.
Article PDF
Rights and permissions
About this article
Cite this article
Seismological Data from India. Nature 148, 164 (1941). https://doi.org/10.1038/148164b0
Issue Date:
DOI: https://doi.org/10.1038/148164b0