28 June 2021
⇐20210627 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210629⇒

NOAA
2 Active Regions
12835
12836

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 W33S06
(519",-139") 		W12-W52
(40) 		4.2 0.1 4.3e19
2 W26N65
(171",843") 		E69-W79
(148) 		3.1 0.6 7.7e20
3 W16N01
(268",-25") 		W10-W21
(11) 		0.3 -1.1 -5.1e19
4 W10S13
(165",-252") 		W06-W14
(8) 		0.3 -2.6 -1.1e20
5 W14N43
(165",619") 		W10-W18
(8) 		0.2 1.0 4.2e19
6 E51S04
(-734",-99") 		E56-E47
(9) 		0.2 -1.1 -4.8e19
7 W37N16
(553",231") 		W32-W41
(9) 		0.1 -0.7 -1.7e19
8 W03S04
(51",-106") 		W02-W04
(2) 		0.1 1.3 1.1e19
9 W24N15
(379",207") 		W22-W26
(4) 		0.0 -2.2 -1.6e19

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 28-Jun-2021 19:30 UT .