24 April 2017
⇐20170423 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170425⇒

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 W16S40
(205",-551") 		E59-W53
(112) 		14.7 -0.9 -5.0e33
2 W37N13
(565",273") 		W30-W43
(13) 		0.3 -2.1 -2.6e32

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 24-Apr-2017 15:07 UT .