Well I found this among my list of Solar sites - it shows flare start and stop times (and size)
http://www.ips.oz.au/asfc/current/recentxflare.html (linked below)

Their home page is: http://www.ips.oz.au/asfc/current/index.html

Lots of real-time solar data. I need to work on a Solor Links page here that can be accessed off the home page...

Canie

• Solar Flare timing