30 January 2024
⇐20240129 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20240131⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E34S39
(-420",-545") 		E45-E08
(37) 		3.3 2.1 1.5e21
2 W44S28
(595",-396") 		W37-W50
(13) 		0.4 -5.8 -5.1e20
3 E22S57
(-196",-769") 		E25-E13
(12) 		0.4 0.4 4.3e19
4 W60N38
(671",631") 		W54-W77
(23) 		0.3 -1.1 -1.6e20
5 W08S18
(127",-199") 		W04-W11
(7) 		0.3 7.3 2.9e20
6 W09N16
(149",361") 		W06-W12
(6) 		0.1 1.2 1.2e19
7 W53S20
(733",-280") 		W49-W59
(10) 		0.1 -6.3 -8.8e19

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-2024 20:30 UT .