19 October 2021
⇐20211018 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211020⇒

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 W29S38
(370",-660") 		E48-W57
(105) 		11.2 -1.1 -3.0e21
2 W22N71
(115",880") 		E75-W76
(151) 		2.5 1.0 9.7e20
3 E07S06
(-114",-184") 		E19-W10
(29) 		1.5 -0.1 -1.8e19
4 W50N30
(636",431") 		W41-W59
(18) 		0.5 1.5 1.8e20
5 W58N23
(757",327") 		W54-W65
(11) 		0.2 3.1 1.5e20
6 E38S31
(-503",-560") 		E42-E33
(9) 		0.2 -1.9 -7.2e19
7 W12N06
(202",18") 		W10-W14
(4) 		0.0 -2.7 -2.0e19

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 19-Oct-2021 11:30 UT .