Showing posts with label Solar Cycle. Show all posts
Showing posts with label Solar Cycle. Show all posts

Monday, March 07, 2011

Sun stirs from an unusually deep sleep

THE sun has finally awoken from a deep slumber.

After an unusually long period of inactivity the fiery star has emerged from its solar minimum, a period characterised by a low number of solar storms and sun spots. Scientists believe changes in the plasma deep below the sun's surface were the cause of its recent period of hibernation, which lasted almost 1½ years longer than expected.

http://www.smh.com.au/environment/weather/sun-stirs-from-an-unusually-deep-sleep-20110306-1bjlq.html

Thursday, March 03, 2011

Researchers Crack the Mystery of the Missing Sunspots

March 2, 2011: In 2008-2009, sunspots almost completely disappeared for two years. Solar activity dropped to hundred-year lows; Earth's upper atmosphere cooled and collapsed; the sun’s magnetic field weakened, allowing cosmic rays to penetrate the Solar System in record numbers. It was a big event, and solar physicists openly wondered, where have all the sunspots gone?