4 May 2012
20120503 Week Rotation Today Rotation Week 20120505

NOAA
7 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E43N16
(-624",306")
E58-E32
(26)
3.5 -4.2 -8.3e33
2 W25S68
(153",-857")
41
(1.7e05)
0.9 6.8 1.1e34
3 E33S21
(-490",-286")
E41-E23
(18)
0.7 -1.1 -2.8e32

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 4-May-2012 23:00 UT .