21 November 2021
⇐20211120 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211122⇒

NOAA
2 Active Regions
12896
12897

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 E25N59
(-215",817") 		E64-W12
(76) 		3.4 0.6 6.4e20
2 W35S28
(486",-486") 		W17-W45
(28) 		1.5 -2.8 -8.9e20
3 W27S64
(195",-887") 		W01-W32
(31) 		0.8 -0.8 -2.7e20
4 W41N17
(615",264") 		W38-W46
(8) 		0.6 -1.5 -1.8e20
5 W53S56
(430",-819") 		W35-W60
(25) 		0.4 -0.8 -1.6e20
6 E37S16
(-560",-289") 		E44-E30
(14) 		0.4 -2.6 -2.1e20
7 E13S69
(-75",-920") 		E34-W09
(43) 		0.3 -1.2 -1.8e20

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 21-Nov-2021 20:30 UT .