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 17 August 2021
⇐20210816 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210818⇒

NOAA
4 Active Regions
12857
12853
12855
12856

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes
 
Main Far-side SDO short-wave SDO long-wave
HMI Mag 20210817 21:58 HMI 6173Å 20210817 22:46 GHN Hα 20210817 08:23
SWAP 174Å 20210817 22:27 AIA 193Å 20210817 23:25 XRT 20210815 06:02
HMI Mag 20210817 21:58 No Time Data Available GONG Farside 20210816 12:11
No Time Data Available AIA 193Å 20210817 23:25 No Time Data Available
HMI Mag 20210817 21:58 AIA 94Å 20210817 23:24 AIA 131Å 20210817 23:28
AIA 171Å 20210817 23:24 AIA 193Å 20210817 23:25 AIA 211Å 20210817 23:28
HMI Mag 20210817 21:58 AIA 304Å 20210817 23:24 AIA 335Å 20210817 23:28
AIA 1600Å 20210817 23:27 AIA 1700Å 20210817 23:28 HMI 6173Å 20210817 22:46


Today's/Yesterday's NOAA Active Regions
NOAA Number
Latest
Position
Hale
Class
McIntosh Class
Sunspot Area
[millionths]
Number of Spots
Recent
Flares
12857 N17W41
(596",195") 		β/β Dro/Bxo 0030/0010 04/02 -
12853 N22W64
(791",307") 		/ / / / -
12855 N13W20
(317",109") 		/ / / / -
12856 N14W91
(919",229") 		/α /Axx /0010 /01 -

Class (HH:MM) -Today
Class (HH:MM) -Yesterday

Events not associated with currently named NOAA regions: None

Note: The tabulated data are based on the most recent NOAA/USAF Active Region Summary issued on 17-Aug-2021 00:30 UT . The greyed out and light-blue entries are values from the previous day. Slashed cells indicate that the active region has no spots. The latest positions of the active regions are given in both heliographic and heliocentric co-ordinates. The region positions are valid on 17-Aug-2021 23:30 UT .