13 July 2021
⇐20210712 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210714⇒

NOAA
3 Active Regions
12841
12842
12839

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 W27S45
(300",-712") 		E29-W46
(75) 		7.5 -1.1 -2.3e21
2 E09N09
(-147",74") 		E22-W13
(35) 		4.6 -0.0 -3.5e19
3 W39S02
(597",-85") 		W18-W60
(42) 		2.3 -0.8 -3.9e20
4 W21N71
(112",868") 		E73-W77
(150) 		1.6 1.0 6.5e20
5 W20S07
(323",-182") 		W15-W25
(10) 		0.2 -0.9 -2.6e19
6 W20S01
(322",-87") 		W18-W22
(4) 		0.1 -1.2 -1.2e19
7 W23N02
(375",-28") 		W22-W25
(3) 		0.0 -2.7 -2.2e19

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 13-Jul-2021 11:30 UT .