2 February 2019
20190201 Week Rotation Today Rotation Week 20190203

NOAA
0 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W16N09
(263",246")
E12-W32
(44)
4.5 -0.8 -9.1e20
2 E33S26
(-483",-352")
E53-E11
(42)
3.5 -0.4 -6.3e20
3 E07S72
(-36",-887")
E66-W79
(145)
2.6 -1.1 -5.0e21
4 W48S18
(686",-231")
W30-W65
(35)
2.0 -0.5 -5.6e20
5 E24N08
(-388",226")
E35-E08
(27)
1.7 0.0 2.3e19
6 W41N06
(637",175")
W31-W49
(18)
0.8 -0.6 -2.1e20
7 W11S27
(170",-357")
W06-W16
(10)
0.3 -0.8 -6.6e19
8 E34S45
(-387",-623")
E38-E28
(10)
0.3 -0.5 -8.5e19
9 W12S40
(161",-544")
W05-W20
(15)
0.2 -0.7 -6.0e19
10 E47S47
(-487",-654")
E47-E43
(4)
0.2 -0.3 -5.1e19

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 2-Feb-2019 20:30 UT .