22 February 2017
⇐20170221 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170223⇒

NOAA
3 Active Regions
12638
12636
12637

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 W23S19
(362",-207") 		W06-W46
(40) 		6.2 1.3 2.1e33
2 W04N60
(37",894") 		E29-W63
(92) 		2.0 0.3 1.3e33
3 E63S26
(-772",-379") 		E72-E49
(23) 		1.0 -1.3 -1.7e33

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 22-Feb-2017 20:30 UT .