21 April 2017
⇐20170420 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170422⇒

NOAA
3 Active Regions
12651
12652
12650

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 E28S27
(-401",-360") 		E63-W12
(75) 		11.5 -1.1 -4.5e33
2 E21N12
(-337",269") 		E30-E13
(17) 		0.8 -2.4 -5.0e32
3 E03S25
(-51",-319") 		E05-E01
(4) 		0.0 -4.3 -4.9e31

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 21-Apr-2017 15:30 UT .