GEOMAGNETIC STORM WATCH: Minor G1-class geomagnetic storms are possible on Nov. 27th or 28th when a CME is expected to sideswipe Earth's magnetic field. The CME left the sun on Nov. 24th following a filament eruption in the sun's southern hemishere. Even if the CME misses, solar wind plasma shoved toward Earth by the nearby storm cloud could spark Arctic auroras

Solar wind
speed: 409.2 km/sec
density: 19.5 protons/cm3
Updated: Today at 0437 UT

X-ray Solar Flares
6-hr max: B4 2331 UT Nov27
24-hr: B5 0450 UT Nov27
Updated: Today at: 0440 UT

WEAK CME IMPACT: As predicted, a CME hit Earth's magnetic field during the late hours of Nov. 27th (approx. 23:30 UT). The weak impact did not cause a geomagnetic storm--not even a minor one. A brief outburst of auroras over Alaska might have been related to the CME's arrival.

Solar wind
speed: 367.2 km/sec
density: 5.9 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1309 UT

X-ray Solar Flares
6-hr max: B4 1311 UT Nov29
24-hr: B6 1338 UT Nov28
explanation | more data
Updated: Today at: 1315 UT

SOLAR ORBITER SURVIVES RISKY FLYBY: Europe's Solar Orbiter buzzed Earth on Saturday just 470 km above the Atlantic Ocean. The close approach brought the spacecraft within the debris zone of Russia's recent ASAT test. Spoiler alert: It survived. Scott Tucker photographed Solar Orbiter racing through the constellation Aries just after the flyby. Watch the movie.

Solar wind
speed: 362.7 km/sec
density: 16.7 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1505 UT

X-ray Solar Flares
6-hr max: B1 1109 UT Nov30
24-hr: B3 0258 UT Nov30
explanation | more data
Updated: Today at: 1510 UT

AN ERUPTION ON THE SUN: A dark filament of magnetism erupted from the sun's southern hemisphere on Nov. 29th: movie.

The debris appears to be heading south of our planet. NOAA forecasters are running computer simulations to confirm the miss.

Solar wind
speed: 513.9 km/sec
density: 8.0 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 2041 UT

X-ray Solar Flares
6-hr max: B1 1643 UT Dec01
24-hr: B2 0739 UT Dec01
explanation | more data
Updated: Today at: 2045 UT

GEOMAGNETIC STORM WATCH: Minor geomagnetic storms are possible on Dec. 3rd when a CME might sideswipe Earth's magnetic field. The storm cloud was hurled into space on Nov. 29th by an erupting filament of magnetism in the sun's southern hemisphere (movie). According to NOAA computer models, the bulk of the CME should sail south of our planet with a near miss just as likely as a glancing blow.

Solar wind
speed: 506.6 km/sec
density: 8.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1321 UT

X-ray Solar Flares
6-hr max: B2 1244 UT Dec02
24-hr: B2 2312 UT Dec01
explanation | more data
Updated: Today at: 1325 UT

Solar wind
speed: 463.9 km/sec
density: 8.9 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0340 UT

X-ray Solar Flares
6-hr max: B2 0256 UT Dec03
24-hr: B2 0256 UT Dec03
explanation | more data
Updated: Today at: 0345 UT

Solar wind
speed: 445.4 km/sec
density: 12.3 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1324 UT

X-ray Solar Flares
6-hr max: B1 1127 UT Dec03
24-hr: B2 0256 UT Dec03
explanation | more data
Updated: Today at: 1330 UT

ANTARCTIC SOLAR ECLIPSE: On Dec. 4th, the New Moon will pass in front of the sun, producing a total solar eclipse visible from parts of Antarctica and the Southern Ocean. Clouds permitting, at least one photographer in the area plans to send us photos of totality--so stay tuned!

https://www.greatamericaneclipse.com/2021-dec-4

Solar wind
speed: 481.0 km/sec
density: 7.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1351 UT

X-ray Solar Flares
6-hr max: C2 0755 UT Dec04
24-hr: C4 0515 UT Dec04
explanation | more data
Updated: Today at: 1355 UT

☀️ SOLAR EXPLOSION MISSES EARTH: Earth-orbiting satellites have just detected a C4-class solar flare (Dec 4th @ 05:15 UT). The source appears to be departing sunspot AR2898. Debris from the explosion will miss Earth because of the blast site's location near the southwestern edge of the sun.

Solar wind
speed: 465.4 km/sec
density: 10.0 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1455 UT

X-ray Solar Flares
6-hr max: B4 0900 UT Dec05
24-hr: M1 0719 UT Dec05
explanation | more data
Updated: Today at: 1500 UT

FARSIDE SOLAR ACTIVITY: A sunspot group on the farside of the sun is exploding--a lot. At least three CMEs have flown over the southwestern limb this weekend. Here is the brightest so far. The source of this activity is probably sunspot complex AR2898-2900, which rotated off the Earthside of the sun a few days ago.

Solar wind
speed: 488.3 km/sec
density: 8.6 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1751 UT

X-ray Solar Flares
6-hr max: B3 1401 UT Dec06
24-hr: C1 1937 UT Dec05
explanation | more data
Updated: Today at: 1755 UT

SOUTHERN EXPLOSION ON THE SUN: Yesterday, Dec. 5th, a magnetic filament in the sun's southern hemisphere exploded. The swirling debris will probably sail well south of our planet. NOAA analysts are running computer models now to confirm the miss.

Daily Sun: 06 Dec 21

All of these sunspots have stable, uncomplicated magnetic fields that pose no threat for strong solar flares. Credit: SDO/HMI

Solar wind
speed: 431.3 km/sec
density: 4.4 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1209 UT

X-ray Solar Flares
6-hr max: A0 0823 UT Dec08
24-hr: B1 1905 UT Dec07
explanation | more data
Updated: Today at: 1215 UT