#AR4366
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peterlewis55.bsky.social
There's a dramatic sunspot group bang in the centre at the moment. You could fit 10 Earths in it! #astronomy #astrophotography @stormhour.com @photohour.bsky.social
AR4366 is currently the most active Sunspot of the Solar Cycle 25
February 4, 2026 at 11:06 AM
marwellaspaceart.bsky.social
Our nice and huge, AR4366!
Taken on February 3, 2026, at 8.02 AM (UTC+7)

📷: Nikon D3500, Nikkor 70-300mm, Baader solar film
February 3, 2026 at 1:33 AM
astropierre.com
Pendant ce temps, sur le Soleil, la zone active AR4366 se déplace lentement vers nous, à la faveur de la rotation de notre étoile.

Dans une semaine, cette région très active, qui a déjà produit plusieurs flashs X ces derniers jours, fera face à la Terre.

#WaitAndSee

👉 earthsky.org/sun/sun-news...
February 2, 2026 at 9:29 AM
jbworkshop.bsky.social
Great cluster of sunspots this morning. This is the AR4366 eruption, including the most intense class (X) of solar flares.

Another bright and crystal-clear day in Vermont.

#seestar #astrophoto #vermont
February 3, 2026 at 6:14 PM
marijkelouise.bsky.social
De meest actieve zonnevlek van zonnecyclus 25 draait zich richting de aarde.

Eduardo Schaberger Poupeau nam deze foto van AR4366 rond het middaguur op 2 hanuari in Rafaela, Argentinië.
February 3, 2026 at 9:37 AM
earthskyscience.bsky.social
Meet active region AR4366. This newcomer #sunspot has just rotated into view on the Earth-facing side of our star. It rapidly became the lead flare producer of the past day. Will we see strong #solarflares in the coming days? Stay tuned and read more #sun news at: buff.ly/HVTgLbX

📸 SDO.
Solar active region AR4366 shown in white light above and magnetogram below highlighting complex magnetic fields.
January 31, 2026 at 2:33 PM
sonjahartl7.eurosky.social
die Sonne bzw. AR4366 hat ja aktuell ganz schön was drauf!
February 2, 2026 at 3:38 PM
peterlewis55.bsky.social
Sunspot group AR4366! One of the most potent to have fired powerful X class flares in years (6 so far). A brief break in the sky after non stop rain! #astronomy #astrophotography @stormhour.com @photohour.bsky.social
Sunspot Group AR4336. White filter image with false colour. The central area of the Sun as it faces Earth with a number of sunspot groups. NASA/SDO image showing flare activity. A graphic of the Sun with a key to all the current Sunspot groups.
February 6, 2026 at 11:57 AM
ututuy.org
Behold #sunspot AR4366. It's huuuge! About 10 Earth diameters from left to right. It is facing almost straight to Earth, so if it goes boom we'll get to see some auroras again!
🧪 🔭 #astrophotography
Picture of a small area of the sun's surface with a backyard telescope. It shows dark areas surrounded by spaghetti-like structures. The rest of the surface shows granulation, which is caused by large scale (a few thousand kilometers) convection near the sun's surface.
February 4, 2026 at 4:07 PM
oetie.nl
AR4366 is lekker bezâg!
spaceweatherlive.com SpaceWeatherLive @spaceweatherlive.com · Feb 2
Major X1.65 flare from sunspot region 4366
Follow live on https://www.spaceweather.live/l/flare
February 2, 2026 at 8:40 AM
tanja-banner.de
Nach dem Motto: Wenn der Himmel nur tagsüber klar ist, muss man eben tagsüber das Teleskop auspacken... Aktueller Blick auf die Sonne, rechts am Rand sieht man die Sonnenfleckengruppe AR 4366, die sich bald verabschiedet. 🔭
Aktueller Blick auf die Sonne am 8.2.2026. Schwarzer Hintergrund, darauf eine orange Kugel (= die Sonnenscheibe). Darauf zu sehen einige schwarze Flecken, vor allem am rechten Rand. Das ist die Sonnenfleckengruppe AR4366. Aktueller Blick auf die Sonne am 8.2.2026. Schwarzer Hintergrund, darauf ein Teil einer orangenen Kugel (= die Sonnenscheibe). Darauf zu sehen einige schwarze Flecken, vor allem am rechten Rand. Das ist die Sonnenfleckengruppe AR4366.
February 8, 2026 at 2:46 PM
earthskyscience.bsky.social
Monster sunspot AR4366 released 14 M (moderate) #flares over the past day! Plus, multiple analyses tied to the recent X flares from AR4366 now point to potential coronal mass ejection arrivals from late on Feb 4 into Feb 6. We might get bright #auroras later this week:
buff.ly/HVTgLbX

📸 NASA/ SDO.
Orange disk with some black spots to the left side. There's one big area with many black spots.
February 3, 2026 at 3:30 PM
aretsch.bsky.social
👀👀 #Sun 2026.02.01

AR4366 🔥 X-Flares and CME

Maybe beautiful Auroras soon....

Footage: JHelioviewer

📸🛰 SDO mixed:
AIA 171, AIA 94, HMI continuum
February 2, 2026 at 1:43 AM
earthskyscience.bsky.social
Michael Teoh at the Heng Ee Observatory, Malaysia, captured this detailed view of behemoth #AR4366 on Saturday. Thank you! 🔭☀️📸
buff.ly/joJqgNU

Massive active region AR4366 has dominated the #sun, putting on an incredible show of powerful X flares. Read our daily sun news:
buff.ly/olSkq6J
Irregular black patches with many thin lines radiating out from their edges, on a mottled yellow background.
February 9, 2026 at 4:30 PM
stephyardley.bsky.social
Looks like I spoke too soon, AR4366 has come back to life with an M class flare as it rotates towards the west limb of the Sun.... 🌞💥👀
February 8, 2026 at 1:17 PM
earthskyscience.bsky.social
Jim Grant in California captured this image on February 2 and wrote: "Sunspot AR4366 and a beautiful green and blue flash from San Diego. A beautiful combination of two different sun phenomena, both very pronounced and clearly visible." Thank you!
buff.ly/ZUUuelG

See more images:
buff.ly/EC09QfO
The sun touching the sea. A green and blue line at the top of the sun. There are some dark spots in the middle.
February 11, 2026 at 1:00 AM
js150.bsky.social
AR4366 from Albany Creek Queensland Australia today in between cloud.
#seestars50
#astrophotography
#solarphotography
February 4, 2026 at 6:20 AM
earthskyscience.bsky.social
AR4366, the sunspot region that amazed us with a barrage of X flares last week, has just been carried out of view by the sun's rotation. But we can still see its flares! 🔭 Read today's #sun news at: buff.ly/olSkq6J

📸 NOAA.
Bright solar flare erupting from the Sun’s edge, glowing turquoise against the blackness of space.
February 12, 2026 at 5:30 PM
perezmedia.bsky.social
Gigantic Sunspot AR4366 just now. It's been tossing out X-class flares, but no CMEs. It has those locked up tight, so no aurora potential from that while it's crossing the meridian. Holding a solar filter up, it's just barely visible to the eye without magnification.
#solarimaging #sunspots
February 4, 2026 at 9:46 PM
houseatrides007.bsky.social
In early February 2026, the sunspot region AR4366 released a series of powerful flares, including an X8.1 flare—one of the strongest recorded in recent years.
February 6, 2026 at 1:01 PM
earthskyscience.bsky.social
The #sun is on fire! In just 24 hours, sunspot AR4366 — 10x wider than Earth — erupted with 5 X-class #flares, including an X8.1, the 3rd-largest of Solar Cycle 25. Strong #radioblackouts hit Earth’s sunlit side, and space weather watchers are on high alert. Read more:
buff.ly/HVTgLbX

📸 NASA/ SDO.
A very bright region appears at the center of the sun. An explosion from this region propels material into space.
February 2, 2026 at 4:30 PM
earthskyscience.bsky.social
A powerful M6.6 #solarflare blasted out from AR4366 at 9:53 UTC this morning. The flare triggered an R2 (moderate) radio blackout across the sunlit side of Earth. Read the #sun news at: buff.ly/HVTgLbX

📸 NASA/ SDO/ JHelioviewer.
Bright solar flare erupts from active region, glowing loops and plasma arcs near the Sun’s horizon.
February 1, 2026 at 2:48 PM
misocycl.one
AR4366 right now lookin like a pretty good region to watch! Pretty much nonstop flaring in the 13-hour loop. Lot of magnetic complexity right now too.
January 31, 2026 at 6:48 PM
earthskyscience.bsky.social
The #sun produced a total of 10 X flares this week ... but none over the past day. And sunspot region AR4366 is getting smaller. Still, the sun stayed busy over the past day, punctuating the time with a sharp M2.2 flare. 🔭

Read the sun news at: buff.ly/HVTgLbX

📸 NASA/ SDO/ SOHO.
A yellow sun with lots of rays and loops.
February 6, 2026 at 2:48 PM
cuckoobirder.bsky.social
With the break in the clouds this afternoon I managed to photograph giant sunspot AR4366 which is currently the biggest of solar cycle 25, it has morphed into a series of interlinking cores stretching just over 200,000 miles across or 25 earth's
February 4, 2026 at 3:33 PM