17 September 2013
⇐20130916 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130918⇒

NOAA
3 Active Regions
11840
11841
11838

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E38N39
(-459",519") 		E45-E31
(14) 		3.3 -0.7 -1.3e33
2 W40N04
(609",-27") 		W33-W46
(13) 		0.6 2.7 6.6e32
3 E22N11
(-351",76") 		E24-E19
(5) 		0.1 -2.9 -8.7e31
4 W25N16
(393",163") 		W22-W28
(6) 		0.1 7.7 1.1e32

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 17-Sep-2013 23:35 UT .