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M6-CLASS SOLAR FLARE: Sunspot 1261 unleashed another strong solar flare this morning–an M6-class flash at 1348 UT. Like yesterday’s eruption from the same active region, this explosion propelled a CME in the general direction of Earth. ETA: August 5th. Stay tuned for additional analysis. UPDATE: A listening station above the Arctic Circle in Norway reports ionospheric waves and VHF radio noise associated with today’s M6-flare: their data. |
EASTERN UNREST: An active region emerging over the sun’s eastern limb is hurling material high above the stellar surface. NASA’s Solar Dynamics Observatory recorded some of the action during the early hours of July 12th:
This eastern unrest is not Earth directed. Forecasters say the greater threat for geoeffective activity comes from sunspot 1247 (finder); it has a “beta-gamma” magnetic field that harbors energy for M-class solar flares. There is a 10% chance of such eruptions during the next 24 hours.
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INCOMING CME: During the early hours of July 9th, a coronal mass ejection (CME) billowed away from new sunspot 1247. A preliminary analysis of data from NASA’s twin STEREO-A and -B spacecraft suggests that the flank of the CME could hit Earth’s magnetic field sometime on July 11th or 12th. This is not a major CME, but it could spark polar geomagnetic storms when it arrives.
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