May 9 2012 Two Incoming CME to Impact Earth Today Magnetic Storm Alert HD

 
Magnetic storm alerts today and tomorrow (10 05 12)
Forecast tracks prepared by analysts at the Goddard Space Weather Lab suggests a pair of solar eruptions on May 7th hurled coronal mass ejections (CMEs) toward Earth. The clouds will arrive in succession today, May 9th at 13:40 UT and May 10th at 07:54 UT (+/- 7 hours). The double impact could spark moderate geomagnetic storms.
High-latitude sky watchers should be alert for auroras.

Sunspot 1476 poses a threat for X-class solar flares.
Also, new sunspots are emerging at the circled location
Solar wind speed at 452.3 km/sec

Interplanetary Mag. Field
Btotal: 6.0 nT
Bz: 5 nT south
The Sun's magnetic field isn't confined to the immediate vicinity of our star. The solar wind carries it throughout the solar system. Out among the planets we call the Sun's magnetic field the "Interplanetary Magnetic Field" or "IMF." Because the Sun rotates (once every 27 days) the IMF has a spiral shape -- named the "Parker spiral" after the scientist who first described it.

Earth has a magnetic field, too. It forms a bubble around our planet called the magnetosphere, which deflects solar wind gusts. (Mars, which does not have a protective magnetosphere, has lost much of its atmosphere as a result of solar wind erosion.) Earth's magnetic field and the IMF come into contact at the magnetopause: a place where the magnetosphere meets the solar wind. Earth's magnetic field points north at the magnetopause. If the IMF points south -- a condition scientists call "southward Bz" -- then the IMF can partially cancel Earth's magnetic field at the point of contact.
SDO/AIA/HMI/NASA
NOAA/Space weather