MetaFilter posts tagged with sunspot

A perfect space storm

stbalbach — Wed, 07 Jan 2009 08:31:13 -0800

A perfect space storm, which happens about every century, like the one that occurred in 1859, could cause "catastrophic social and economic disruptions", according to a new study by the National Academy of Sciences on behalf of NASA. "Potable water distribution affected within several hours; perishable foods and medications lost in 12-24 hours; immediate or eventual loss of heating/air conditioning, sewage disposal, phone service, transportation, fuel resupply and so on," the report states. Outages could take months to fix, the researchers say. Banks might close, and trade with other countries might halt. The next peak in solar activity is expected around 2012.

My Life In Ham Radio

jackspace — Fri, 21 Nov 2008 12:00:22 -0800

"Ham Radio is a life long learning experience. You never stop learning." Don, W3RDF, is a CW enthusiast who shares with us his love of a hobby that has been a source of many friends from around the globe. With Solar Cycle 24 just beginning, the Ham Bands have been heating up with activity. Perhaps you might want to listen to what they are saying.

Out, damned spots!

unSane — Tue, 10 Apr 2007 07:38:48 -0800

Sunspot activity is closely linked to climate. Although it observes an 11 and 22 year cycle, the overall trend of activity shows much longer term variations. The so-called Maunder Minimum (1645-1715) coincided with the Little Ice Age, while the Medieval Maximum coincided with the Medieval Warm Period. Analysis of beryllium isotopes from ice cores in Greenland shows that sunspot activity is currently at a 1000 year high. Could this account, at least in part, for global warming? Recent data from Mars suggests this may be so, while others remain sceptical. Bonus pix, more here.