7 September 2012
20120906 Week Rotation Today Rotation Week 20120908

NOAA
7 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E25N27
(-362",329")
E33-E15
(18)
0.9 -6.9 -2.0e33
2 W23N38
(297",501")
W14-W29
(15)
0.6 1.9 4.3e32
3 E22S38
(-279",-668")
E31-E12
(19)
0.3 -3.5 -6.8e32

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 7-Sep-2012 21:00 UT .