31 January 2013
⇐20130130 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130201⇒

NOAA
4 Active Regions
11662
11663
11665
11666

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E43N29
(-577",535") 		E68-E24
(44) 		2.1 -2.2 -3.7e33
2 E02S05
(-26",16") 		16
(1.6e04) 		-3.4 8.0 1.3e33
3 E27N07
(-441",210") 		E31-E24
(7) 		0.2 -5.7 -3.3e32

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 31-Jan-2013 22:00 UT .