"For forms of government let fools contest; that which is best administered is best. " -Alexander Pope. Critically examine the statement and state clearly wheter democracy is irrelevant to good governance in developing countries like India?.
New technique to forecast geomagnetic storms developed
Post by Admin,Dec 14,2018.
A team of scientists have found a way to predict the Sun’s activity over the coming decades, which could help better prepare against solar storms that may cripple satellite communications and Earth’s electric power grids. In a study published in the journal Nature Communications, the team also showed that there is little possibility of a Sun-induced climate cooling in the coming year. Researchers from Indian Institute of Science Education and Research (IISER) Kolkata and Inter-University Centre for Astronomy and Astrophysics (IUCAA) Pune put forward a prediction for the upcoming sunspot cycle which reveals the expected conditions in space over the next decade.
This research has direct relevance for protection of India’s space-based technological assets and the global climate.
Using a novel technique devised by Professor Dibyendu Nandi from IISER Kolkata and his PhD student Prantika Bhowmik, the team predicts that the next sunspot cycle will start about a year after the end of the current cycle and peak in 2024.
They also predict that space environmental conditions over the next decade would be similar or slightly harsher compared to the last decade.
The space weather is governed by a constant stream of charged particles — electrons and protons — flowing out from the Sun and permeating the solar system.
Solar storms are a variety of eruptions of mass and energy from the solar surface. Flares, prominences, sunspots, coronal mass ejections are the common harbingers of solar activity, as are plages and other related phenomena seen at other wavelengths.
They all involve sudden releases of stored magnetic energy, which accelerates the hot gases near the surface or in the corona of the Sun.
Sometimes these particles make it all the way to the Earth and beyond by flowing along the Sun's magnetic field into interplanetary space. When the material collides with the Earth's magnetic field and trapped radiation belts, it can dump particles into our upper atmosphere to cause the Aurora.
The same 'charged' particles can produce their own magnetic fields which can modify the Earth's magnetic field and affect compass readings.
The changing magnetic fields can also 'induce' electricity in long pipelines, or produce electrical surges in our power grids leading to brown outs and black outs.