22 October 2021
⇐20211021 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211023⇒

NOAA
1 Active Region
12886

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 E23N66
(-154",844") 		E45-W83
(128) 		3.4 0.8 9.6e20
2 W11S31
(161",-571") 		W02-W17
(15) 		0.5 -0.8 -7.3e19
3 W42S60
(325",-862") 		W41-W49
(8) 		0.2 -1.0 -8.0e19
4 W43S09
(646",-213") 		W39-W45
(6) 		0.0 -2.9 -2.9e19
5 W60S04
(836",-103") 		W58-W63
(5) 		0.0 -1.1 -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 22-Oct-2021 19:30 UT .