20 November 2023
⇐20231119 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20231121⇒

NOAA
4 Active Regions
13489
13490
13491
13488

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 W31N16
(477",242") 		W21-W41
(20) 		1.7 2.8 8.8e20
2 E41N15
(-623",220") 		E51-E30
(21) 		1.2 4.3 1.1e21
3 W09S39
(124",-640") 		E03-W14
(17) 		0.6 -2.2 -2.9e20
4 W33N67
(206",882") 		W27-W31
(4) 		0.2 -1.1 -8.8e19
5 W30N30
(423",456") 		W27-W33
(6) 		0.0 -1.6 -1.5e19
6 W27S44
(316",-705") 		W24-W30
(6) 		0.0 -2.1 -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 20-Nov-2023 20:30 UT .