New Delhi, Sept. 19 -- The sun has been unusually active lately, and the increase in solar activity is raising concerns among scientists. After nearly 20 years of quiet, the sun has begun to ramp up its behavior, with powerful solar winds and intense solar storms that could affect everything from power grids to communication systems, the Daily Mail reported.

For nearly two decades, the sun's activity was slower than normal, with its solar winds decelerating. However, since 2008, there has been a change. NASA scientists, according to the Daily Mail, found that the sun's solar winds have grown stronger.

The solar winds, which are flows of electrically charged particles, have increased in temperature, speed, and density, in addition to bei...