25 May 2021
⇐20210524 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210526⇒

NOAA
2 Active Regions
12824
12825

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 E18S12
(-281",-183") 		E44-W27
(71) 		7.0 0.1 7.4e19
2 W51N51
(466",745") 		W46-W59
(13) 		0.1 1.5 3.7e19
3 W22S29
(312",-438") 		W20-W24
(4) 		0.0 2.1 1.5e19

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 25-May-2021 19:30 UT .