21 April 2012
20120420 Week Rotation Today Rotation Week 20120422

NOAA
7 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E22N23
(-327",448")
E28-E15
(13)
0.6 -14.1 -3.2e33
2 E08N12
(-126",278")
E10-E05
(5)
0.2 -59.1 -2.1e33
3 E08N50
(-87",782")
E13-E00
(13)
0.1 3.0 3.6e32

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 21-Apr-2012 23:00 UT .