23 February 2017
⇐20170222 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170224⇒

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 W37S21
(541",-255") 		W21-W59
(38) 		4.7 1.9 3.6e33
2 E52S28
(-676",-393") 		E86-E34
(52) 		2.9 -0.6 -1.5e33
3 W14N60
(117",894") 		E37-W61
(98) 		2.0 0.3 1.2e33
4 W25N10
(405",277") 		W22-W28
(6) 		0.4 1.7 2.3e32

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-Feb-2017 20:30 UT .