Bipolar ‘anemone active region’ AR4243 within a large coronal hole (CH85-), surrounded by a ring-shaped filament. On the left side (in the east), you can see how the fast solar wind escapes and wobbles along the magnetic field lines.

Active Region 4242 (what a name!) in the southeast has the potential to become a significant solar flare player

New space weather forecast/analysis article (in German) raumwetter.de/die-sonnenak...

Synoptic map of the sun: coronal holes, filaments, sunspot groups (active regions)

2025-10-03 0500z - M1.5 flare, 2 eruptions, 2 CMEs, one heading NE, one heading toward earth, likely arrival around Oct 6

Four very active regions in the northeast of the sun.

Solar Synoptic Map: New Active Regions, Many Filaments, Large Coronal Holes

Did you know that our sun can do that? Sympathetic flaring between -90° and +90° (SDO AIA 94, 131, 171 Å)

Halo-CME heading earth. Not simulated by any agency. Possible impact Sep 28 or 29 together with CH82 high speed stream (high uncertainty) raumwetter.de/sonnensturm-...

The sun. The moon. The CMEs.

Sun today: New regions rotate into view 😊 AR4220 in the SW↘︎: no further growth 😣

Active Region 4216 contains a dense filament in its center that needed some reconfiguration. A C5.6 and an M1.5 flare occurred. It appears that no material escaped the corona.

Sun's potential magnetic field, polarities of active regions, filaments and most prominent the large coronal hole CH80+ that will soon cross the central meridian and might bring us fast solar wind from 21 Sep on suntoday.lmsal.com/suntoday/?su...

Sunspot group AR4220 - growth & increasing complexity

Sunspot groups: 30 hours of development

Sunspot groups & coronal holes

Active Region 4220: Even more growth 09-17 0100z-2045z

Where to get SDO images when NASA's SDO server is down? * browse for SDO AIA images sdo.oma.be/data/aia_qui... * play with helioviewer gs671-suske.ndc.nasa.gov * find SDO HMI images at JSOC hmi.stanford.edu/data/hmiimag... * check out this SWL alternative solen.info/solar/

Sunspot development: Active Region 4216, 4220, 4221, 4217/4224/4223

Development of sunspots over the last 30 hours (SDO HMI)

Sunspots, magnetic field and flare activity of the sun's east side

We have published a summary article on progress within our @erc.europa.eu project HELIO4CAST on predicting the magnetic fields of #solarstorms. ☀️💥🧲 edition.pagesuite-professional.co.uk/html5/reader...

Active sunspot region 4220 (SE sun) has a beta-gamma configuration with a spot of opposite polarity immediately north of the leading spot and produced a C3.5 flare at 1200z. 👀

Filament eruption - northwest limb of the sun

Energy transfer into the magnetosphere: PC index = 4 ☞ Potential for substorms pcindex.org

post-eruptive arcades off the NE limb / relatively stable AR4216 in the NE / new AR4219 near the N central meridian, simple bipolar / big sunspot cluster near the SE limb with AR4217 being the most prominent - not too exciting so far

The sun was busy today. Difficult to count all the observable phenomena.

A CME from an active region, a filament eruption (CME unclear) and a coronal EUV wave maybe from another eruption ☞ activity rises

Active Region 4216: Magnetically rather simple but we see some flux emergence in its intermediate section

Slow filament lift-off in the southeast

Sep 12: Sun's far side filament eruption with a CME heading south (GOES SUVI 304/SOHO LASCO C2/GOES CCOR-1)

Active Region 4216 – East limb beauty - How much flare/CME potential has it? We'll know soon…

Complex filament eruption in the central south produced one or more CMEs with partial halos with possible earth-directed components that may or may not arrive around September 14

The sun presents: East Limb Cinema feat. Loops & Plasma Rain

The sun of Sep 10 2025 in 171/193/304 Å (SDO AIA Instrument)

A large and complex active region is approaching the eastern limb. It appears to still be growing. (SDO AIA 171 Å) raumwetter.de/ruhige-sonne...

Coronal hole(s) at Carrington longitude 330 since February 2025 - it's negatively polarised = less geoeffective this time of the year (SDO AIA 193+211Å, may blink - not for epileptics)

Sun's far side: magnetogram seen by Solar Orbiter. A large region north of the equator will rotate into view in some days.

A few quiet days lie ahead, dominated by a large coronal hole with negative polarity (east/left).

Right: Active Region 4211 (with a little anti-hale spot now) Left: AR 4213 with moderate to strong flux emergence but rather simple bipolar yet

My interpretation of the solar wind: Glancing blow CME with NES flux rope

Our sun lost its mind - west limb madness (ar4197 is involved)

Active Region 4213 (south east of the solar disc) shows rapid growth

Filament eruption 2025-09-04 2030z - CME impact possible early/mid 09-07 - G1 MINOR - G2 MODERATE (maybe G3 STRONG) STORM possible - high uncertainty due to missing triangulation raumwetter.de/filament-eru...

Coronal holes at Carrington Longitude 60 since August 2024 raumwetter.de/schneller-so...

Fast solar wind from coronal hole CH75+/CH76+ expected – images: last rotation and now raumwetter.de/schneller-so...

My guess: Bz will turn negative soon and stay negative

STEREO A Heliospheric Imager 2 shows the position of the CME (pink = earth) helioforecast.space/cme stereo-ssc.nascom.nasa.gov/beacon/beaco...

MOSWOC UK publishes a G4 Watch - all videos and forecasts (text in German): raumwetter.de/30-8-erdgeri...

Long Duration M2.6 flare from AR 4199 that produced the halo CME some days ago - dimming, EUV wave – CME very likely