30 January 2023
20230129 Week Rotation Today Rotation Week 20230131



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W12N46
(143",765")
E13-W24
(37)
2.1 -0.7 -3.5e20
2 W30S14
(478",-153")
W16-W43
(27)
1.7 -2.3 -7.0e20
3 E00S70
(-1",-876")
E23-W80
(103)
1.4 -0.6 -2.7e20
4 E58N03
(-824",102")
E62-E54
(8)
0.1 1.1 2.8e19
5 E21N58
(-185",869")
E25-E17
(8)
0.0 -0.6 -8.2e18

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 30-Jan-2023 20:30 UT .