Sun activity for June 5, 2023: CME on its way, possible arrival June 7
Today’s top news: Everybody’s talking about yesterday’s filament eruption on the southwest solar quadrant. As we reported yesterday, it hurled a coronal mass ejection (CME) into space. And a portion of the CME is coming our way. Preliminary analysis suggests a CME glancing blow by June 7, 2023. But do note that specialists still are working on further modeling and analysis of the event. The SOHO spacecraft’s LASCO C2 imager registered the blast at around 11:12 UTC. Then the LASCO C3 imager registered a partial halo one the southwest at around 12 UTC. Take a look to ENLIL model on our animation below. A more ample look at the blast shows the north part of the ejecta returning back to the sun. But the south portion did manage to escape into space. Last 24 hours: Sun activity keeps at low levels. There were only C flares produced during the past day, from 11 UTC yesterday to 11 UTC today. Total production of the period was 15 flares with the largest being a C5.8 flare by active region AR3327. It was blasted out on the southeast limb (edge) at 14:30 UTC on June 4, 2023. AR3327 was also the most active sunspot of the past day. It contributed with eight flares. This same active region was yesterday’s hero, too, when it had not been numbered yet. It is now being carried more fully into view by the sun’s rotation. Welcome, AR3327! Currently the sun bears seven labeled active regions on its Earth-facing side. Next 24 hours: The forecast is a 99% chance for C flares, a 35% chance for M flares, and a 10% chance for X flares. Next expected CME: Besides the abovementioned coronal mass ejection (CME) – produced by a filament eruption at around 4 UTC on June 4 – no other Earth-directed CMEs were observed on available imagery on the past day. Current geomagnetic activity: The expected geomagnetic storm arrived as a Kp = 4 (no NOAA scale) turbulence of the magnetic field. Threshold reached at 20:59 UTC on June 4. At the time of this writing (11 UTC, June 4), Earth’s magnetic field is quiet again. But there is a slight chance for a G1 (minor) geomagnetic storm during the rest of the day today, due fast solar wind from a large coronal hole. This hole is now located on the sun’s southwest limb (edge), about to go out of view. But there are two new coronal holes forming on our side of the solar disk. One is on the sun’s northeast quadrant, and a larger is on the southeast. For now, unsettled conditions are expected for June 6.
The sun in recent days
More sun images from our community
We invite you all to send us your beautiful recent photos of sunspots and auroras. Naturally, we love receiving your photos! And to those of you who’ve already posted a photo to our community page, thank you.
Bottom line: June 5, 2023, sun activity. A coronal mass ejection (CME) is coming our way. Preliminary analysis suggests June 7 arrival. Meanwhile, a Kp = 4 disturbance was registered on Earth’s magnetic field over the past day.
C. Alex Young is a solar astrophysicist studying the Sun and space weather. Alex is passionate about sharing science with diverse audiences. This led him to start The Sun Today with his designer wife, Linda. First through Facebook and Twitter then adding an extensive website thesuntoday.org, the two work together to engage the public about the Sun and its role in our solar system. Alex led national engagement efforts for the 2017 total solar eclipse. He is the Associate Director for Science in the Heliophysics Science Division at NASA Goddard Space Flight Center.
Raúl Cortés studied engineering at the Autonomous University of Nuevo León in Monterrey, Mexico, obtained a scholarship to continue his studies in Japan and after returning to Monterrey he got credits on MBA from the Graduate School of Mechanical and Electrical Engineering Faculty. He became a teacher at the University UANL teaching Math and Physics and dedicated the rest of his professional career to serve in engineering areas for USA, Japan and Germany based corporations. His passion for the skies go back to when he was a child, always intrigued about the stars and constellations and reading and researching about the matter. From 2010 on, he dedicated his attention to photographing the stars, constellations, the moon and the sun. Raúl's work on his photography has been published and posted on the ESC as well as in other platforms and has gained attention to be published by local Monterrey newspapers.
Armando is well known as an astronomy educator, after 30+ years leading extensive initiatives of public outreach and 10+ years teaching in colleges. As one of only a handful of Puerto Rican science communicators during Comet Halley's last visit, he assumed a pioneering role starting in 1985 when science was just beginning to enter the local mindset; over time his work brought meaningful change to the culture, inspiring people to pursue interests in science and technology. His affiliations include Ana G. Méndez University–Cupey, where in 2014 he spearheaded an 8-course extension program focusing on observational astronomy, the first ever in the island.
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