How long back do we have usable records of solar spot activity? Even though the human lifespan is short, the solar lifespan is long and I would be surprised if any signal in the frequency range of a human lifespan is anything more than noise... -Adam On 8/7/08, Apptech wrote: > NASA plot of sunspot activity. > Updated monthly. > > http://www.swpc.noaa.gov/SolarCycle/index.html > > I've been saving these each month for some months now and > it's been interesting to see the activity continue to drop > towards zero while the predictions gamely urge it to > splutter into life. > > Maunder minimum in the wings, or just a hiccup. Stay tuned, > could be interesting. > > > Russell > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- EARTH DAY 2008 Tuesday April 22 Save Money * Save Oil * Save Lives * Save the Planet http://www.driveslowly.org -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist