4 December 2021
⇐20211203 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211205⇒

NOAA
4 Active Regions
12898
12902
12901
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 W34S06
(545",-111") 		W11-W50
(39) 		3.0 0.3 1.6e20
2 E20N02
(-331",28") 		E30-E08
(22) 		1.8 0.1 2.4e19
3 E12N26
(-180",417") 		E21-E02
(19) 		0.8 -2.2 -2.8e20
4 W54S20
(742",-343") 		W43-W67
(24) 		0.5 3.6 5.4e20
5 E18S46
(-210",-708") 		E27-E06
(21) 		0.5 -0.9 -9.7e19
6 E24S72
(-123",-928") 		E62-W09
(71) 		0.4 -0.6 -1.4e20
7 E54S61
(-387",-852") 		E62-E43
(19) 		0.2 -0.6 -6.0e19
8 E23S22
(-352",-366") 		E25-E21
(4) 		0.1 -4.1 -4.0e19
9 W09S42
(108",-654") 		W06-W11
(5) 		0.0 -2.2 -1.5e19

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 4-Dec-2021 20:30 UT .