7 December 2021
⇐20211206 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211208⇒

NOAA
4 Active Regions
12904
12901
12902
12903

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W08S33
(108",-531") 		E14-W24
(38) 		1.7 -0.7 -2.3e20
2 E39N61
(-297",853") 		E59-E32
(27) 		0.9 0.9 3.0e20
3 E18S69
(-106",-912") 		E60-W20
(80) 		0.8 -0.7 -2.4e20
4 W24S19
(378",-322") 		W19-W30
(11) 		0.3 -0.9 -4.2e19
5 E21S06
(-345",-107") 		E25-E18
(7) 		0.1 -1.1 -2.6e19
6 W08S49
(86",-734") 		W03-W11
(8) 		0.1 1.0 1.8e19
7 W36N24
(524",391") 		W33-W38
(5) 		0.1 -5.2 -7.8e19
8 W09S02
(153",-35") 		W07-W11
(4) 		0.1 -2.1 -2.4e19
9 E05S57
(-45",-814") 		E08-E01
(7) 		0.1 -0.8 -1.4e19
10 E39S00
(-611",-3") 		E42-E36
(6) 		0.1 -0.6 -6.3e18
11 E60N01
(-841",21") 		E64-E56
(8) 		0.0 1.6 1.9e19
12 W35S17
(539",-282") 		W32-W37
(5) 		0.0 -1.5 -1.2e19

Note: Solar Monitor's coronal hole segmentations are performed by CHIMERA, a copy of which is available at: github.com/TCDSolar/CHIMERA.

The operations of the CHIMERA algorithm is described in a peer reviewed paper: arxiv.org/abs/1711.11476.

An extensive copy of coronal hole properties are available at: solarmonitor.org/data.

The latest positions of the coronal holes are given in heliocentric co-ordinates, and the region positions are valid on 7-Dec-2021 20:30 UT .