12 December 2021
⇐20211211 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20211213⇒

NOAA
1 Active Region
12904

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 W20N02
(339",40") 		E05-W35
(40) 		4.2 -0.5 -3.7e20
2 W14N59
(119",846") 		E62-W42
(104) 		3.1 0.5 5.2e20
3 E13S36
(-171",-568") 		E33-W11
(44) 		2.3 -1.9 -8.3e20
4 E31S03
(-502",-38") 		E52-E11
(41) 		2.0 0.0 1.1e18
5 E31S64
(-224",-871") 		E63-E01
(62) 		1.5 -0.5 -3.0e20
6 E10N08
(-169",153") 		E15-E05
(10) 		0.4 1.0 6.3e19
7 W01S12
(18",-190") 		E04-W06
(10) 		0.3 -1.3 -6.1e19
8 W42S05
(654",-81") 		W38-W46
(8) 		0.1 1.6 3.7e19
9 E60S26
(-762",-421") 		E64-E55
(9) 		0.1 -1.1 -2.5e19
10 W15N19
(244",324") 		W13-W17
(4) 		0.1 -2.1 -2.0e19
11 E52S26
(-685",-429") 		E55-E48
(7) 		0.0 -2.3 -2.7e19

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 12-Dec-2021 20:30 UT .