17 September 2021
⇐20210916 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210918⇒

NOAA
1 Active Region
12870

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 W30S02
(483",-129") 		W15-W49
(34) 		4.1 -0.5 -3.5e20
2 W01N70
(6",847") 		E91-W92
(183) 		3.3 1.1 1.2e21
3 W11S32
(150",-608") 		E17-W24
(41) 		2.6 -0.5 -2.5e20
4 E01S07
(-16",-227") 		E14-W12
(26) 		1.7 -0.2 -4.6e19
5 E14S64
(-103",-900") 		E46-W37
(83) 		1.0 -0.8 -3.9e20
6 E40S25
(-562",-485") 		E44-E35
(9) 		0.6 -3.5 -4.5e20
7 E12N34
(-171",434") 		E17-E07
(10) 		0.5 1.8 1.6e20
8 W35N26
(495",330") 		W30-W40
(10) 		0.2 -0.9 -4.2e19
9 E06N21
(-93",234") 		E09-E02
(7) 		0.2 6.5 2.3e20
10 W07N52
(67",673") 		E02-W13
(15) 		0.2 -0.6 -1.9e19
11 W27S57
(233",-853") 		W22-W29
(7) 		0.1 -0.9 -2.5e19

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 17-Sep-2021 11:30 UT .