25 April 2017
⇐20170424 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170426⇒

NOAA
3 Active Regions
12651
12652
12653

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
(301",-626") 		E80-W67
(147) 		12.5 -0.8 -5.4e33
2 W52N12
(735",247") 		W48-W56
(8) 		0.1 -2.9 -2.2e32

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-Apr-2017 19:30 UT .