12 August 2012
20120811 Week Rotation Today Rotation Week 20120813

NOAA
7 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E56S18
(-746",-352")
E74-E44
(30)
0.7 1.0 8.8e32
2 W28S08
(444",-231")
W24-W34
(10)
0.5 5.6 9.1e32
3 E04N32
(-51",402")
E07-W04
(11)
0.4 -0.9 -8.6e31
4 W24N18
(361",198")
W17-W28
(11)
0.2 -4.5 -2.1e32
5 E18N80
(-54",907")
E39-E02
(37)
0.1 -1.2 -4.8e32
6 W14N21
(218",239")
W10-W18
(8)
0.1 -2.0 -4.1e31
7 W17N16
(264",154")
W15-W19
(4)
0.1 -3.9 -7.7e31
8 W21S29
(303",-540")
W20-W24
(4)
0.1 -2.8 -7.7e31

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 12-Aug-2012 23:00 UT .