HARD RADIATION STORM: Sunspot AR3664 (now known as AR3697) just did it again. A powerful explosion on the sun today peppered Earth and nearby spacecraft with "hard" protons. The radiation storm fogged satellite cameras for hours. Following close behind, a CME is heading for Earth, and its arrival on June 10th could spark G2-class geomagnetic storms. https://spaceweather.com has updates.
#radiationstorm
So, even though #AR3664 is no longer #EarthFacing, we may not be out of the woods yet...
via #SpaceWeather . com
"CMEs emitted by the departing sunspot [#AR3664] are no longer flying toward Earth. At most only glancing blows are likely from eruptions on May 12th through 14th.
"The danger could return on May 15th, however. On that date the sunspot will pass through a region of the sun magnetically connected to Earth via the #ParkerSpiral. Subatomic debris (protons and electrons) from explosions on May 15th and 16th could spiral back to Earth and rain down our planet. This is called a 'radiation storm;' it can upset #satellite #electronics and cause polar #RadioBlackouts. "
#SpaceWeather Update via #SolarHam
"Earth Directed Halo #CME / #RadiationStorm
March 23, 2024 @ 10:30 UTC
"LASCO coronagraph imagery is updated and shows a full halo coronal mass ejection (CME) that is Earth directed. The main bulk of plasma seems to be heading north, however a noteworthy impact past our planet is likely within 72 hours and may trigger a geomagnetic storm once it arrives. Energetic particles did begin to reach our planet almost 3 hours after the flare event and a minor (S1) to moderate (S2) radiation storm is currently in progress."
#SolarFlares #SolarFlare #GeomagneticStorm #RadioBlackout #SolarCycle25
via Spaceweather.com
Sunday, July 30, 2023
"GEOMAGNETIC STORM WATCH (G2): Geomagnetic storms are possible on Aug. 1st when a #CME is expected to hit Earth's magnetic field. Minor G1-class storms are likely with a chance of escalating to category G2. The CME was hurled almost directly toward Earth by the eruption of a magnetic filament in the sun's northern hemisphere on July 28th. Aurora alerts: SMS Text
"#PROTONS ARE *STILL* HITTING EARTH'S ATMOSPHERE: For the second day in a row, energetic protons from the sun are raining down on Earth's atmosphere. This is called a "radiation storm" (S1-class), and it was caused by a magnificent eruption on July 28th.
"The blast site was hidden from view just behind the sun's northwestern limb. Earth-orbiting satellites registered an M4-class solar flare, but the underlying explosion was stronger. It was probably an X-flare partially eclipsed by the edge of the sun.
"How can a sunspot not facing Earth send so many protons in our direction? The answer is 'the #ParkerSpiral.' Take a look. As the sun spins, its magnetic field spirals like water flowing from a twirling lawn sprinkler. Lines of magnetic force emerging from behind the sun's northwestern limb (where the explosion happened) spiral back and make a direct connection to Earth. It's a superhighway for energetic protons.
"This #RadiationStorm looks like it will continue at S1 levels for at least one more day. Its main effect is a polar cap absorption event (PCA) inside the Arctic Circle. Right now, #shortwave radios around the north pole aren't working very well."
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