30 July 2021
⇐20210729 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210731⇒

NOAA
3 Active Regions
12846
12847
12849

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 E22N67
(-138",833") 		E66-W84
(150) 		4.2 0.8 1.2e21
2 W03N10
(46",76") 		E01-W05
(6) 		0.1 -2.9 -5.5e19
3 E42N33
(-528",456") 		E45-E38
(7) 		0.1 0.9 2.1e19
4 W25N07
(402",34") 		W21-W28
(7) 		0.1 0.8 1.1e19

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 30-Jul-2021 23:30 UT .