CHANCE OF STORMS, DOWNGRADED: NOAA analysts have determined that a CME launched by yesterday's "inky explosion" (described below) will sail east of the sun-Earth line, missing our planet. Another CME might still deliver a weak blow on Aug. 26-27. Overall, the chance of magnetic storms is less than before, albeit not zero.

Solar wind
speed: 398.6 km/sec
density: 5.4 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0510 UT

X-ray Solar Flares
6-hr max: B2 2351 UT Aug25
24-hr: B4 1602 UT Aug25
explanation | more data
Updated: Today at: 0515 UT

Solar wind
speed: 404.3 km/sec
density: 11.6 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0459 UT

X-ray Solar Flares
6-hr max: C3 2322 UT Aug26
24-hr: C3 2322 UT Aug26
explanation | more data
Updated: Today at: 0505 UT

WEAK IMPACT: As predicted, a CME hit Earth's magnetic field on Aug. 27th (0100 UT). The impact was weak, lifting the solar wind speed by less than 50 km/s, and it did not cause a geomagnetic storm.

The CME was hurled in our direction by an unstable solar filament on Aug. 23rd.

Solar wind
speed: 362.8 km/sec
density: 0.7 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0631 UT

X-ray Solar Flares
6-hr max: M4 0611 UT Aug28
24-hr: M4 0611 UT Aug28
explanation | more data
Updated: Today at: 0635 UT

Solar wind
speed: 390.7 km/sec
density: 9.5 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1720 UT

X-ray Solar Flares
6-hr max: C2 1722 UT Aug29
24-hr: C8 1003 UT Aug29
explanation | more data
Updated: Today at: 1725 UT

🚨 MINOR STORM WARNING: A CME hurled into space by Thursday's solar tsumani is expected to strike Earth later today (Aug. 29th) or tomorrow (Aug 30th). NOAA forecasters say there is a chance of minor G1-class geomagnetic storms when the CME arrives.

Solar wind
speed: 395.7 km/sec
density: 8.5 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0431 UT

X-ray Solar Flares
6-hr max: C1 0154 UT Aug30
24-hr: C8 1003 UT Aug29
explanation | more data
Updated: Today at: 0435 UT

GEOMAGNETIC STORM WARNING: One and perhaps two CMEs are about to hit Earth. The first, hurled toward us by Thursday's solar tsumani (C3), is expected to arrive on Aug. 29-30.

The second, ejected by Saturday's solar flare (M4.7), could come on Aug. 31-Sept 1. Neither CME is particularly bright or powerful; however, they could combine to produce G1-class geomagnetic storms.

Solar wind
speed: 384.7 km/sec
density: 5.0 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1830 UT

X-ray Solar Flares
6-hr max: C2 1624 UT Aug30
24-hr: C2 1624 UT Aug30
explanation | more data
Updated: Today at: 1835 UT

Solar wind
speed: 387.0 km/sec
density: 9.7 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0910 UT

X-ray Solar Flares
6-hr max: B2 0341 UT Aug31
24-hr: C3 2134 UT Aug30
explanation | more data
Updated: Today at: 0915 UT

Solar wind
speed: 336.5 km/sec
density: 9.4 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1920 UT

X-ray Solar Flares
6-hr max: C1 1331 UT Sep01
24-hr: C1 1331 UT Sep01
explanation | more data
Updated: Today at: 1925 UT

GEOMAGNETIC STORM WATCH: Earth's magnetic field is about to get jolted by a pair of CMEs. Estimated time of arrival: Sept. 1-2. NOAA forecasters expect geomagnetic storms as strong as category G2. That means people as far south as Idaho and New York (geomagnetic latitude 55 deg.) could see auroras.

Solar wind
speed: 320.2 km/sec
density: 9.2 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 0434 UT

X-ray Solar Flares
6-hr max: B3 0352 UT Sep02
24-hr: C1 1331 UT Sep01
explanation | more data
Updated: Today at: 0440 UT

WAITING FOR THE CMEs: NOAA forecasters say G1 to G2-class geomagnetic storms are possible on Sept. 2nd when a pair of CMEs is expected to double-tap Earth's magnetic field. The last time a G2-class storm occured (March 20, 2021), beautiful auroras spread across northern-tier US states. The forecast calls for déjà vu.

Solar wind
speed: 356.3 km/sec
density: 7.9 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1705 UT

X-ray Solar Flares
6-hr max: B4 1150 UT Sep02
24-hr: B4 1150 UT Sep02
explanation | more data
Updated: Today at: 1710 UT

Solar wind
speed: 372.5 km/sec
density: 6.4 protons/cm3
more data: ACE, DSCOVR
Updated: Today at 1810 UT

X-ray Solar Flares
6-hr max: B2 1427 UT Sep02
24-hr: B4 1150 UT Sep02
explanation | more data
Updated: Today at: 1815 UT