Figure 3
From: Falling monsoon depression frequency: A Gray-Sikka conditions perspective

Tracks of the monsoon depressions from IMD cyclone e-atlas having genesis, 1.a) south of 20°N for the period 1950–1979, 1.b) south of 20°N for the period 1980–2009, 2.a) north of 20°N for the period 1950–1979 and 2.b) north of 20°N for the period 1980–2009.
The figures and the relevant statistics, have been generated using the online Cyclone eAtlas of the India Meteorological Department <http://www.rmcchennaieatlas.tn.nic.in>.