Solar activity is very low, with only three C-class flare reported during last 24 hours. The strongest flare was the C1.6 flare (peaked at 16:00 UT on October 07) originating from the not yet classified active region at about N15 E25. No Earth-directed CMEs were observed during last 24 hours. We expect solar activity to remain low with occasional C-class flares.ACE solar wind data indicate possible arrival of the sector boundary or ICME (solar origin is not yet understood). The sector change was observed at about 05:30 UT this morning. The Bz component of the interplanetary magnetic field is fluctuating and it had few intervals of negative value (up to – 8 nT). Simultaneously to the longest interval of negative Bz (about 4 hours) the magnitude of the interplanetary magnetic field had reached the value of about 10 nT. Currently the interplanetary magnetic field magnitude is about 4 nT and the solar wind speed is still low with the value of about 350 km/s. Due to negative intervals of Bz component of the interplanetary magnetic field we have currently active geomagnetic conditions (K=4 reported by local station at Dourbes). We expect unsettled to active geomagnetic conditions to continue in the coming hours.
Sunsets may be the most watched celestial event, but lately sunsets have even offered something extra. A sunspot so large it was visible to the naked eye is captured in Swiss skies in this sunset scene from January 5, crossing left to right near the center of a solar disk dimmed and distorted by Earth’s dense atmosphere. Detailed views reveal a large solar active region composed of sunspots, some larger than planet Earth itself. Cataloged as active region AR 1944, on January 7 it produced a substantial solar flare and a coronal mass ejection (CME) forecast to reach Earth. The CME could trigger geomagnetic storms and aurora on January 9.
NASA APOD 08-Jan-14