30 April 2021
⇐20210429 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210501⇒

NOAA
3 Active Regions
12818
12820
12821

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 W07S01
(117",52") 		E37-W48
(85) 		19.4 0.2 6.1e20
2 W02N67
(12",904") 		E56-W52
(108) 		1.0 0.5 2.6e20
3 E11N38
(-141",637") 		E14-E06
(8) 		0.1 -1.6 -3.5e19

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-Apr-2021 23:30 UT .