4 February 2024
⇐20240203 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20240205⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W20S63
(148",-822") 		E05-W32
(37) 		0.8 1.0 2.5e20
2 E56S53
(-484",-739") 		E86-E42
(44) 		0.8 0.3 8.2e19
3 W35S27
(499",-357") 		W28-W38
(10) 		0.7 1.9 2.7e20
4 W40S50
(407",-688") 		W33-W43
(10) 		0.6 0.6 8.4e19
5 E21S20
(-335",-238") 		E25-E18
(7) 		0.1 -2.6 -5.1e19
6 E06S45
(-66",-617") 		E07-E02
(5) 		0.1 -0.6 -8.1e18
7 W09S35
(130",-473") 		W06-W12
(6) 		0.1 3.6 3.9e19
8 E26S16
(-417",-177") 		E28-E24
(4) 		0.1 -192.9 -1.9e21
9 E12S37
(-157",-496") 		E14-E09
(5) 		0.0 2.9 2.2e19
10 E15N03
(-250",150") 		E16-E13
(3) 		0.0 -2.1 -1.2e19

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 4-Feb-2024 20:30 UT .