Category Archives: Earth Sciences


Precipitation over Equatorial east Africa is quite different from that over other equatorial regions. East Africa itself, along with Somalian coast, is an area of low rainfall and is almost arid in some parts. Thus, the most notable characteristic of Read more…


Shale Gas is a form of natural gas that is trapped within shale (a fine grained sedimentary rock) formations, shale gas is known for more than a century. It was not seen as a viable alternative to petroleum fuels because Read more…


The theory of plate tectonics explains the Earth’s crustal dynamics by the movement of rigid lithospheric plates. Each plate is part of a shell on a sphere, so different parts of the plate move at different velocities.   The direction Read more…


Pseudo volcanic features are certain topographic features that resembles volcanic forms but are of non-volcanic origin. They include Meteorite crater, Salt plugs, and Mud volcanoes? Craters Crater is an abrupt circular depression formed by extrusion of volcanic material, by collapse, Read more…


Most forms of condensation in the atmosphere result from the air being cooled in some way or the other. Condensation near the ground results from contact cooling, advection cooling and radiation cooling. A number of weather phenomena result from condensation Read more…


Tropical cyclones called as Hurricanes in Caribbean and Central America, Typhoonsin South China Sea, Cyclones in Bay of Bengal are not only confine to these arear. They also occur South of Japan called Taifu, in Phillipines called as Baguio, and in Australia as Willy Willies) Tropical cyclone form Read more…


Cloud seeding is an attempt to stimulate natural precipitation processes by injecting nucleating agents into clouds, typically from aircraft. It is observed that even in dry regions, there is no dearth of clouds. India has just perfected cloud seeding Cloud-seeding Read more…


El Niño/La Niña-Southern Oscillation, or ENSO, is a quasi-periodic climate pattern that occurs across the tropical Pacific Ocean on an average of every five years, but over a period which varies from three to seven years. It is characterised by variations in the temperature of the Read more…


The Earth will definitely live up to next 4.5 billion years. That is the prescribed age of the earth. One way in which the Earth can meet its end then will be when the Sun converts itself into a Red Read more…


WHY LIGHTNING OCCURS Lighting is a brilliant flash of light produced by discharge of static electricity of about 100 million volts. Thunderstorms are notable for their lightning and thunder effects. The problem of how thunderstorms become electrified still remains unsolved Read more…