Graph of solar flare activity
X-rays of the sun from 27 January 2011 to 28 January 2011 according to the GOES-15 satellite
Class M1.3 flare occurred at night, Moscow time, and there was about 20 minutes with a maximum of 04.03 MSK. Preceded the outbreak of high solar activity observed more days. From the middle of the day Thursday, there were five flashes, RIA "Novosti".
Solar flares are divided according to the power of X-ray radiation from the sun into five classes, which are designated by letters of the alphabet: A, B, C, M and X. Minimum class A0.0, corresponds to radiation on the Earth's orbit in 10 nanowatts per square meter, and the transition to every other category increased 10 times.
Burst of activity associated with a single active region on the sun, getting a room in the catalog in 1149 NOAA (National Oceanic and Atmospheric Administration of the United States). Currently, this area is on the western edge of the Sun at 90 degrees longitude.
Scientists note that the largest outbreak of a new 24th solar cycle was recorded February 12, 2010 and had a level of M8.3. Since then, the sun, there was not one of the larger events. This slow growth in activity is very unusual for the sun, and was last seen at the intersection of 18th and 19th century.