Chart:
Solar X-Ray Flux is described as follows: Level Flux (watts /
sq meter) Description A less than 10 ^ -LRB--8) Very Low Background A between 10 ^ -LRB--8) and 10 - 7 Low Background B between 10 ^ -LRB--7) and 10 - 6 Moderate Background C between 10 ^ -LRB--6) and 10 - 5 High Background / Low Flare M between 10 ^ -LRB--5) and 10 - 4 Moderate Flare X between 10 ^ -LRB--4) and 10 - 3 High Flare Y greater than10 ^ -LRB--3) Extreme Flare http://www.ips.gov.au/Educational/2/1/3