8 April 2021
⇐20210407 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210409⇒

NOAA
1 Active Region
12813

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 W09N12
(153",298") 		E34-W47
(81) 		12.3 0.2 3.7e20
2 E06S65
(-43",-822") 		E59-W20
(79) 		3.1 -0.9 -8.1e20
3 W19N70
(111",927") 		E19-W40
(59) 		0.3 1.1 2.1e20
4 W32S21
(471",-259") 		W27-W36
(9) 		0.2 -1.6 -4.4e19
5 W15N38
(197",667") 		W11-W19
(8) 		0.1 -1.2 -2.7e19
6 W42S11
(628",-108") 		W39-W45
(6) 		0.1 1.0 2.0e19
7 W21S28
(298",-363") 		W17-W24
(7) 		0.1 -3.2 -5.1e19
8 W13N11
(217",282") 		W11-W16
(5) 		0.1 -1.4 -1.7e19
9 W02N17
(29",381") 		E00-W03
(3) 		0.1 1.6 1.8e19
10 W39N02
(609",105") 		W37-W41
(4) 		0.0 0.7 6.2e18
11 W16N47
(183",764") 		W14-W20
(6) 		0.0 -0.3 -4.0e18
12 E10S07
(-162",-20") 		E11-E08
(3) 		0.0 -1.0 -6.6e18
13 W10N37
(129",660") 		W08-W11
(3) 		0.0 -1.4 -1.1e19

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 8-Apr-2021 19:30 UT .