A very strong solar flare measuring M9.8 erupted from Active Region 3500 at 19:50 UTC on November 28, 2023. The event started at 19:35 UTC and ended at 20:09 UTC. Earth-directed CME is very likely.<\/strong> <\/p>\n A Type II Radio Emission with an estimated velocity of 854 km\/s was detected beginning at 19:59 UTC. Type II emissions occur in association with eruptions on the Sun and typically indicate a coronal mass ejection (CME) is associated with a flare event.<\/p>\n Additionally, a 10cm Radio Burst (Tenflare) with a peak flux of 720 sfu, was associated with the flare event. A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.<\/p>\n Region 3500 is located at the center of the solar disk, making Earth-directed CMEs very likely.<\/p>\n Radio frequencies were forecast to be most degraded over SW USA, Central America, W South America and the Pacific Ocean at the time of the flare.<\/p>\n Multiple CMEs were produced on November 27, with three of these appearing to have Earth-directed components.<\/p>\n The first arrival is a potential glancing blow or near-Earth proximity passage beginning early November 30 (UTC). <\/p>\n The later CMEs are anticipated to arrive at Earth early December 1 (UTC) as at least glancing blows.<\/p>\n As a result, SWPC issued a G2 \u2013 Moderate Geomagnetic Storm Watch for December 1.<\/p>\n Potential impacts: The area of impact is primarily poleward of 55 degrees Geomagnetic Latitude. <\/p>\n Induced currents \u2013 Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms. Featured image credit: NASA SDO\/AIA 131, Helioviewer, The Watchers<\/em><\/p>\n If you value what we do here, create your ad-free account and support our journalism.<\/p>\n <\/center>\n\n<\/p>\n Wednesday, November 8, 2023<\/span><\/p>\n<\/div>\n<\/div>\n<\/section>\n Monday, November 6, 2023<\/span><\/p>\n<\/div>\n<\/div>\n<\/section>\n Saturday, November 4, 2023<\/span><\/p>\n<\/div>\n<\/div>\n<\/section>\n Thursday, September 21, 2023<\/span><\/p>\n<\/div>\n<\/div>\n<\/section>\n Wednesday, September 20, 2023<\/span><\/p>\n<\/div>\n<\/div>\n<\/section>\n Tuesday, September 19, 2023<\/span><\/p>\n<\/div>\n<\/div>\n<\/section>\n\n
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Spacecraft \u2013 Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio \u2013 HF (high frequency) radio propagation can fade at higher latitudes.
Aurora \u2013 Aurora may be seen as low as New York to Wisconsin to Washington state.<\/p>\nGlobal SAR arc outbreak: Geomagnetic storm leads to rare SAR arc sightings across the globe<\/h3>\n
Geomagnetic storm reaches G3 \u2013 Strong level after dual CME impact<\/h3>\n
Large filament eruption produces partial-halo CME, impact to Earth expected on November 5<\/h3>\n
Strong M8.7 solar flare erupts from Region 3435<\/h3>\n
Strong M8.2 solar flare erupts from Region 3435<\/h3>\n
Two CMEs strike Earth, producing G3 \u2013 Strong geomagnetic storm<\/h3>\n
G2 \u2013 Moderate to G3 \u2013 Strong geomagnetic storm conditions forecast for September 19<\/h3>\n