Solar wind
speed: 409.3 km/sec
density: 3.7 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0654 UT

X-ray Solar Flares
6-hr max: B4 0612 UT Sep09
24-hr: C8 1730 UT Sep08
explanation | more data
Updated: Today at: 0700 UT

WILL EARTH DODGE ANOTHER CME? Yesterday, Sept. 8th @ 0009 UT, sunspot AR2864 erupted, producing a C2-class solar flare. The explosion sent a global shock wave rippling through the sun's atmosphere and hurled a lopsided CME into space. NOAA analysts are modeling the CME's trajectory now to determine if it might strike Earth. Stay tuned!

Solar wind
speed: 365.7 km/sec
density: 9.0 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1100 UT

X-ray Solar Flares
6-hr max: B4 1049 UT Sep10
24-hr: B8 1716 UT Sep09
explanation | more data
Updated: Today at: 1105 UT

A LOPSIDED CME IS COMING: Last week, 3 CMEs missed Earth. Will this week be different?

Another CME is on the way following an explosion in the magnetic canopy of sunspot AR2864 on Sept. 8th. NOAA analysts believe Earth could experience a glancing blow or near miss late on Sept. 11th.

Solar wind
speed: 313.4 km/sec
density: 11.9 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1210 UT

X-ray Solar Flares
6-hr max: B6 0728 UT Sep11
24-hr: C1 2134 UT Sep10
explanation | more data
Updated: Today at: 1215 UT

Solar wind
speed: 323.8 km/sec
density: 8.9 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0615 UT

X-ray Solar Flares
6-hr max: B4 0042 UT Sep12
24-hr: B6 0728 UT Sep11
explanation | more data
Updated: Today at: 0620 UT

Solar wind
speed: 370.2 km/sec
density: 13.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1810 UT

X-ray Solar Flares
6-hr max: B4 1714 UT Sep12
24-hr: B5 2251 UT Sep11
explanation | more data
Updated: Today at: 1815 UT

🔥 Solar wind
speed: 509.7 km/sec
density: 8.5 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0645 UT

X-ray Solar Flares
6-hr max: B8 0258 UT Sep13
24-hr: B8 0258 UT Sep13
explanation | more data
Updated: Today at: 0650 UT

OFF-TARGET CME PRODUCES ... QUIET: A CME expected to sideswipe Earth's magnetic field on Sept. 11-12 missed, making it at least the 5th CME to narrowly miss our planet in the past two weeks. New acronym: CME=Certain to Miss Earth. Our planet's magnetic field is quiet and expected to remain so for the next 3 days.

🔥 Solar wind
speed: 452.4 km/sec
density: 6.9 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1255 UT

X-ray Solar Flares
6-hr max: B5 1239 UT Sep13
24-hr: B8 0258 UT Sep13
explanation | more data
Updated: Today at: 1300 UT

🔥 Solar wind
speed: 486.4 km/sec
density: 5.6 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1744 UT

X-ray Solar Flares
6-hr max: B5 1239 UT Sep13
24-hr: B8 0258 UT Sep13
explanation | more data
Updated: Today at: 1750 UT

SOLAR WIND FROM THE SUN'S NORTH POLE: Earth is inside a minor stream of solar wind leaking from a far-northern hole in the sun's atmosphere. Geomagnetic storms are not expected. Nevertheless, the action of the stream could spark auroras around the Arctic Circle on Sept. 13-14.

Solar wind
speed: 440.6 km/sec
density: 2.1 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0641 UT

X-ray Solar Flares
6-hr max: B8 0346 UT Sep14
24-hr: B8 0346 UT Sep14
explanation | more data
Updated: Today at: 0645 UT

Solar wind
speed: 437.5 km/sec
density: 4.7 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0535 UT

X-ray Solar Flares
6-hr max: B4 0115 UT Sep15
24-hr: C1 0649 UT Sep14
explanation | more data
Updated: Today at: 0540 UT

GEOMAGNETIC STORM WATCH: Confidence is growing that a CME might graze Earth's magnetic field on Sept. 17th, possibly sparking minor G1-class geomagnetic storms.

The CME left the sun on Sept. 13th, propelled toward us by an exploding filament of magnetism. Tracking this CME has been tricky, because in coronagraph imagery it overlapped at least two other storm clouds.

Confusion among simultaneous CMEs increased the uncertainty of the forecast.

Solar wind
speed: 317.6 km/sec
density: 7.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0620 UT

X-ray Solar Flares
6-hr max: B1 0226 UT Sep16
24-hr: B2 1415 UT Sep15
explanation | more data
Updated: Today at: 0625 UT

MINOR GEOMAGNETIC STORM WATCH: A CME is approaching Earth for a close encounter on Sept. 17th. It will either miss or deliver a glancing blow. Both outcomes are equally possible given uncertainties in the CME's trajectory. A hit could spark minor G1-class geomagnetic storms and high-latitude auroras.

Solar wind
speed: 333.4 km/sec
density: 7.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1345 UT

X-ray Solar Flares
6-hr max: A1 0000 UT Jan01
24-hr: B2 1415 UT Sep15
explanation | more data
Updated: Today at: 1350 UT