4 September 2013
⇐20130903 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20130905⇒

NOAA
4 Active Regions
11834
11835
11836
11837

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E28N57
(-249",733") 		E46-W10
(56) 		4.2 0.4 1.3e33
2 W42S07
(629",-207") 		W36-W46
(10) 		0.5 0.8 2.0e32
3 E47N14
(-681",143") 		E54-E40
(14) 		0.2 -4.0 -4.3e32

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 4-Sep-2013 23:35 UT .