Weak CME impact caused unsettled geomagnetic field levels

Weak CME impact caused unsettled geomagnetic field levels

A weak CME shock was observed in the solar wind by the ACE and SOHO/CELIAS instruments on October 31st afternoon around 14:45 UTC. The solar wind speed jumped up from 280 km/s up to 370 km/s and also the solar wind density increased. Initial solar wind velocity had

A solar wind stream hit Earth’s magnetic field

A solar wind stream hit Earth’s magnetic field

A solar wind stream hit Earth's magnetic field during the early hours of August 24th, sparking geomagnetic activity around the Arctic Circle. "Bright, fast-moving auroras lit up the sky just after midnight," reports Sean M. Scully, who sends this picture f

Behemoth sunspot 1263 has almost doubled in size

Behemoth sunspot 1263 has almost doubled in size

Behemoth sunspot 1263 has almost doubled in size this weekend. A 28-hour movie from NASA's Solar Dynamics Observatory shows the spot developing a tail that has added some 50,000 km of length to the active region.This development may increase the likelihood of a stro