21 February 2017
⇐20170220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170222⇒

NOAA
3 Active Regions
12637
12638
12636

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 W14S20
(222",-229") 		E08-W36
(44) 		6.9 1.4 2.2e33
2 E01N60
(-5",891") 		E54-W61
(115) 		2.0 0.5 1.8e33
3 W51S34
(628",-481") 		W41-W70
(29) 		0.6 0.6 3.2e32
4 W18S30
(255",-391") 		W16-W20
(4) 		0.0 -1.2 -1.5e31
5 W56S80
(135",-938") 		W78-W88
(10) 		0.0 -1.4 -3.4e32

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-Feb-2017 20:30 UT .