Geomagnetic Storm Watch. Active Sunspot

 GEOMAGNETIC STORM WATCH: A series of coronal mass ejections (CMEs) propelled toward Earth by the recent eruptions of sunspot 1283 will deliver glancing blows to Earth's magnetic field on Sept. 9th - 11th. High-latitude sky watchers should be alert for auroras in the nights ahead. Aurora alerts: text, voice.

ACTIVE SUNSPOT: Sunspot 1283 is producing flares so intense they are visible through solar telescopes in backyards 93 million miles away. Amateur astronomer Andy Devey photographed this one, and M6-class eruption, from Barnsley UK on Sept. 8th:

The magnetic canopy of sunspot 1283 has an unstable "beta-gamma-delta" configuration tthat harbors energy for more powerful eruptions. NOAA forecasters estimate a 75% chance of M-flares and a 25% chance of X-flares during the next 24 hours.

MERCURY-DIRECTED CME: On Sept 8th around 2300 UT, the SOHO and STEREO spacecraft detected a significant CME emerging from the farside of the sun. Earth is not in the line of fire, but the planet Mercury is. Analysts at the Goddard Space Weather Lab estimate that the cloud will reach the innermost planet on Sept. 9th at 12:00 UT (plus minus 7 hours). Click to view a movie of their CME model:

Fuente: Spaceweather