SUBSIDING GEOMAGNETIC STORM: A G1-class geomagnetic storm caused by the impact of a CIR on Jan. 8th (see above) is subsiding now. The storm is over. Arctic auroras remain possible as Earth enters a moderately fast stream of solar wind flowing behind the CIR.
FARSIDE SOLAR EXPLOSION: Something just exploded on the farside of the sun. Hidden from view, the blast hurled a magnificent CME over the northeastern edge of the solar disk. The bright light at the top of this SOHO coronagraph movie is Venus, which happened to be passing by the sun at the same time:
When the CME appeared, US Air Force antennas detected strong Type II and Type IV radio bursts. These are caused by shock waves inside the CME. Frequency drifts revealed the speed of the storm cloud, approximately 575 km/s or 1.3 million mph.
The source of this blast, probably an unstable sunspot, should turn toward Earth later this week.
When the CME appeared, US Air Force antennas detected strong Type II and Type IV radio bursts. These are caused by shock waves inside the CME. Frequency drifts revealed the speed of the storm cloud, approximately 575 km/s or 1.3 million mph.
The source of this blast, probably an unstable sunspot, should turn toward Earth later this week.
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