16 September 2021
⇐20210915 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210917⇒

NOAA
3 Active Regions
12866
12869
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 W23N06
(378",-5") 		E24-W53
(77) 		10.8 -0.3 -6.0e20
2 E09N70
(-49",849") 		E36-W81
(117) 		3.2 1.2 1.4e21
3 E05S32
(-75",-604") 		E24-W17
(41) 		2.9 -0.4 -2.1e20
4 E09S63
(-66",-895") 		E53-W24
(77) 		1.0 -0.7 -3.2e20
5 E24N36
(-309",469") 		E32-E18
(14) 		0.5 2.1 1.9e20
6 E15N22
(-228",241") 		E18-E10
(8) 		0.3 7.3 3.8e20
7 E51S27
(-659",-501") 		E56-E46
(10) 		0.2 -2.4 -1.6e20
8 E57S03
(-797",-114") 		E63-E50
(13) 		0.2 -0.6 -4.0e19
9 E03N53
(-29",688") 		E10-W07
(17) 		0.2 -1.2 -4.7e19
10 W22S23
(332",-472") 		W19-W26
(7) 		0.2 -0.9 -2.6e19
11 W38N14
(569",136") 		W35-W40
(5) 		0.1 -1.5 -1.5e19
12 W10N54
(100",697") 		W05-W14
(9) 		0.0 1.3 1.3e19

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 16-Sep-2021 19:30 UT .