18 August 2023
20230817 Week Rotation Today Rotation Week 20230819



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W33N03
(510",-40")
W29-W36
(7)
0.1 -5.3 -1.4e20
2 W10S40
(123",-688")
W07-W12
(5)
0.1 11.5 2.1e20
3 W10N42
(118",553")
W04-W13
(9)
0.1 -1.8 -2.2e19

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 18-Aug-2023 23:30 UT .