What was the most amout of sunspots that ever occured and what was the size of the largest sunspot?
The most active 11-year solar cycle on record is cycle 19, which reached a monthly averaged sunspot number of over 250 in the end of 1957 (note that groups enter this number with a multiplicator of 10). Compare this with this cycle, which just went a little over 150. More info and graphics under: http://science.nasa.gov/ssl/pad/solar/sunspots.htm and http://sidc.oma.be/html/sidc_graphics.html The largest sunspot group in the last 9 years is pictured at: http://sohowww.nascom.nasa.gov/hotshots/2000_09_22/ It occurred in September 2000 in Active Region 9169. It covered an area a thirteen times larger than the surface of the Earth! The size of the absolute largest sunspot I don’t know. I would have to look that up. But certainly not much bigger than the one described above. Dr.
