20 October 2021
⇐20211019 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211021⇒

NOAA
1 Active Region
12886

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 W48S33
(602",-570") 		W39-W67
(28) 		3.5 -1.5 -1.5e21
2 E10N72
(-53",884") 		E65-W76
(141) 		2.5 1.0 9.7e20
3 W25S63
(188",-891") 		E33-W57
(90) 		1.3 -0.7 -4.2e20
4 E16S29
(-231",-547") 		E22-E08
(14) 		0.5 -3.1 -3.0e20
5 W16N07
(265",28") 		W14-W19
(5) 		0.2 -1.0 -2.6e19
6 W24S37
(320",-643") 		W22-W26
(4) 		0.1 -1.1 -2.0e19
7 W29N30
(401",413") 		W26-W32
(6) 		0.1 -8.0 -1.1e20

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 20-Oct-2021 23:30 UT .