~Space Weather Update~ Advancing Sunspots~ Looking Towards Earth~ Wind Speed 361~
CHANCE OF AURORAS: NOAA forecasters estimate a 15% to 20% chance of polar geomagnetic storms during the next 24 hours in response to a possible glancing blow from a CME. High-latitude sky watchers should be alert for auroras. Aurora alerts: text, voice.
INCREASING SOLAR ACTIVITY CLEANS UP SAT-DEBRIS: Earth's atmosphere has been puffing up in response to increasing levels of UV radiation from sunspots. This is good news for satellite operators, because a puffed up atmosphere helps clean up low-Earth orbit. "The number of cataloged debris in Earth orbit actually decreased during 2011," reports Nick Johnson in NASA's Orbital Debris Quarterly newsletter. "[The figure below] illustrates how the rate of debris reentries from the Fengyun-1C anti-satellite test of January 2007 increased during the past year."