18 October 2021
⇐20211017 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211019⇒

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Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W22S39
(287",-670") 		E42-W46
(88) 		12.4 -1.1 -3.1e21
2 W17N71
(90",880") 		E85-W69
(154) 		2.4 1.0 9.3e20
3 W40N31
(534",433") 		W31-W51
(20) 		0.5 2.1 2.5e20
4 W44S07
(664",-179") 		W42-W46
(4) 		0.1 0.5 1.2e19
5 E10S12
(-164",-289") 		E12-E08
(4) 		0.1 -1.1 -1.4e19
6 E18S06
(-291",-182") 		E19-E16
(3) 		0.0 -1.0 -6.7e18
7 W36N37
(453",521") 		W34-W39
(5) 		0.0 -0.4 -3.9e18

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-Oct-2021 19:30 UT .