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Marko Rummelsburg @markorummelsburg.bsky.social · 3h

Two days development of active sunspot region 4246: Increasing size, number of spots and complexity combined with an unusual north-south orientation

Marko Rummelsburg @markorummelsburg.bsky.social · 4h

STEREO A shows an earth-directed CME, a faint partial Halo visible in SOHO/LASCO C2, possible directions for the plasma from the dimming region south of 4246 and a 400 km/s CME listed in DONKI

Marko Rummelsburg @markorummelsburg.bsky.social · 5h

The sun was busy today, but as far as i can tell, no earth-directed solar storms were launched…

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Marko Rummelsburg @markorummelsburg.bsky.social · 1d

Growth of active sunspot region 4246 – potential CMEs likely to be deflected northwards

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Marko Rummelsburg @markorummelsburg.bsky.social · 1d

Is that northward Bz aurora?

Marko Rummelsburg @markorummelsburg.bsky.social · 2d

East limb of the sun – foreground: old region 4220 (new 4249) - behind: old regions 4214/4217 – Can they still make a difference?

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Marko Rummelsburg @markorummelsburg.bsky.social · 2d

The sun today: Mostly quiet

(SDO AIA 171 Å + SDO HMI Magnetogram)

Marko Rummelsburg @markorummelsburg.bsky.social · 2d

Quiet sun, fast solar wind, more activity soon? Current space weather report (in German) raumwetter.de/ruhige-sonne...

Ruhige Sonne, schneller Sonnenwind, bald aktiver - raumwetter.de

Die Sonne ist ruhig – das wird bald wieder anders. Zuvor schneller Sonnenwind und erhöhte geomagnetische Aktivität

raumwetter.de

Marko Rummelsburg @markorummelsburg.bsky.social · 3d

The solar synoptic map shows a quiet sun with only a few small sunspot groups and a large coronal hole that crossed the central meridian. Its fast solar wind may arrive in 2-4 days and lead to increased geomagnetic activity.

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Marko Rummelsburg @markorummelsburg.bsky.social · 5d

Synoptic map of the sun: many filaments, mainly simple sunspot groups (active regions) and a large coronal hole near the central meridian

Marko Rummelsburg @markorummelsburg.bsky.social · 6d

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.

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Marko Rummelsburg @markorummelsburg.bsky.social · 8d

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

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Marko Rummelsburg @markorummelsburg.bsky.social · 8d

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

Die Sonnenaktivität bleibt moderat erhöht - raumwetter.de

Weiterhin M-Klasse-Flares, koronale Massenauswürfe, abnehmender schneller Sonnenwind und mäßige geomagnetische Aktivität

raumwetter.de

Marko Rummelsburg @markorummelsburg.bsky.social · 9d

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

Marko Rummelsburg @markorummelsburg.bsky.social · 9d

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

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Marko Rummelsburg @markorummelsburg.bsky.social · 14d

Four very active regions in the northeast of the sun.

Marko Rummelsburg @markorummelsburg.bsky.social · 15d

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

Marko Rummelsburg @markorummelsburg.bsky.social · 16d

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

Marko Rummelsburg @markorummelsburg.bsky.social · 17d

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Marko Rummelsburg @markorummelsburg.bsky.social · 17d

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-...

Sonnensturm-Streifschuss & schneller Sonnenwind ab 28.9. - raumwetter.de

Ein unscheinbarer Halo-CME könnte uns um den 28.9./29.9. streifen und mit dem schnellen Sonnenwind aus CH81/CH82 interagieren.

raumwetter.de

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Marko Rummelsburg @markorummelsburg.bsky.social · 20d

The sun. The moon. The CMEs.

Marko Rummelsburg @markorummelsburg.bsky.social · 22d

Sun today: New regions rotate into view 😊

AR4220 in the SW↘︎: no further growth 😣

Marko Rummelsburg @markorummelsburg.bsky.social · 23d

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.

Marko Rummelsburg @markorummelsburg.bsky.social · 23d

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...