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Last Post 3/22/2013 10:31 AM by  Hazel Bain
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3/22/2013 8:15 AM
    I'm Alex, and I'm in 8th grade from Califonia Area. My question is How many solar flares happen each year?

    Hazel Bain

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    3/22/2013 10:31 AM
    Hi Alex, It depends what year. The Sun has an 11 year solar cycle where it goes through solar maximum and produces lots of flares, and then solar minimum where it produces hardly any. It also depends on the size of the solar flare i.e. how much energy is emitted during the flare. Solar physicists classify flares as type A, B, C, M or X according to the peak flux (in watts per square metre, W/m2) that is recored by the GOES spacecraft which orbits the Earth. The biggest flares are the X class flares. These are usually really spectacular and occur less frequently, you can get tens of these in one year during solar maximum. However at the same time you get a LOT more small flares. We are currently near solar maximum and this week we had 1 M class and 26 C class flares and many more B class events. At solar minimum you might only get a few B class flares in a week. Hazel
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