21 July 2020
20200720 Week Rotation Today Rotation Week 20200722

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Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E23S12
(-364",-270")
E46-W09
(55)
5.6 -0.3 -2.5e20
2 W26S12
(405",-272")
W06-W42
(36)
3.2 -0.5 -2.6e20
3 W42N69
(225",856")
E12-W78
(90)
1.7 1.1 7.9e20
4 E40S55
(-346",-808")
E49-E22
(27)
0.4 -0.5 -9.8e19
5 E58N67
(-313",850")
E73-E66
(7)
0.4 0.7 1.4e20
6 W33S68
(190",-900")
W16-W52
(36)
0.1 -0.5 -4.4e19
7 W52S57
(400",-819")
W44-W64
(20)
0.1 -0.7 -3.8e19
8 W19N12
(300",119")
W17-W21
(4)
0.1 -1.1 -1.1e19

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 21-Jul-2020 19:00 UT .