30 September 2021
⇐20210929 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211001⇒



Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E01N02
(-15",-78") 		E51-W42
(93) 		9.5 -0.3 -4.7e20
2 W23N67
(150",835") 		E88-W75
(163) 		4.5 1.1 1.6e21
3 E54S35
(-631",-607") 		E63-E46
(17) 		0.5 -0.8 -1.4e20
4 E21N46
(-238",609") 		E30-E09
(21) 		0.3 -0.6 -3.2e19
5 W43N02
(658",-45") 		W41-W46
(5) 		0.1 -0.8 -9.4e18
6 W37N01
(582",-77") 		W34-W40
(6) 		0.0 -1.3 -1.2e19
7 W24N59
(201",764") 		W19-W27
(8) 		0.0 -0.9 -1.1e19
8 E31S07
(-486",-219") 		E33-E29
(4) 		0.0 -1.2 -8.3e18
9 E03N14
(-53",120") 		E04-E02
(2) 		0.0 3.3 1.9e19

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-Sep-2021 19:30 UT .