The Shanghai Observatory claimed that they had detected two huge solar flares in an active region on the surface of the sun yesterday, which indicates eruptions of sunspots in the coming days, reported today's Oriental Morning Post.
Though the sun is becoming cooler, more recently than in previous days, solar activity should remain high due to the peppered spots on its surface, according to the National Satellite Meteorological Center.
A tremendous sunspot, newly born and numbered as "720", has been in an extremely active state since the middle of last January.  Its strong magnetic field has influenced short-wave broadcasts in cities like Beijing, Shanghai, Guangzhou, Hainan, Lanzhou and Urumchi. 
However, chronometer experts expect that the services of China Mobile and China Unicom in Shanghai will remain normal, comforting local residents.

Reference:
Sunspots really are magnetic islands. They consist of magnetic force fields poking through the sun's surface from below. Sometimes these magnetic fields erupt, producing a solar flare. With a temperature of "only" a few thousand degrees C, sunspots are cooler than their surroundings and, thus, they appear dark. Sunspots are as big as planets.
(From: www.spaceweather.com)