23 April 2017
⇐20170422 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170424⇒

NOAA
3 Active Regions
12651
12653
12652

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 W05S33
(66",-453") 		E53-W40
(93) 		18.0 -0.9 -5.0e33
2 W24N25
(355",468") 		W22-W27
(5) 		0.2 -2.7 -2.0e32

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 23-Apr-2017 19:30 UT .