17 October 2021
⇐20211016 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211018⇒

NOAA
1 Active Region
12882

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 W04S40
(49",-684") 		E24-W37
(61) 		12.4 -1.1 -2.9e21
2 W11N72
(55",885") 		E77-W81
(158) 		2.4 0.9 8.7e20
3 W28N32
(378",444") 		W14-W40
(26) 		1.1 1.9 4.2e20
4 W36S08
(567",-201") 		W29-W46
(17) 		0.9 -0.5 -8.6e19
5 W41N01
(631",-54") 		W38-W44
(6) 		0.1 -0.8 -9.0e18
6 W34N23
(495",304") 		W31-W37
(6) 		0.0 3.2 2.9e19
7 W23N04
(369",-23") 		W21-W24
(3) 		0.0 -1.0 -6.2e18

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 17-Oct-2021 23:30 UT .