29 November 2021
⇐20211128 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211130⇒

NOAA
4 Active Regions
12898
12900
12901
12899

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 E28S10
(-457",-192") 		E46-W15
(61) 		7.3 1.0 1.3e21
2 W25N67
(157",891") 		E58-W67
(125) 		1.7 0.9 6.6e20
3 W21N35
(288",552") 		W03-W31
(28) 		1.1 0.9 2.2e20
4 E28N26
(-413",408") 		E35-E22
(13) 		0.1 -1.0 -2.8e19

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 29-Nov-2021 20:30 UT .