4 April 2021
⇐20210403 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210405⇒

NOAA
1 Active Region
12812

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 W00S00
(7",100") 		E43-W40
(83) 		15.9 0.2 4.0e20
2 E35S31
(-474",-420") 		E44-E26
(18) 		0.4 -1.1 -9.6e19
3 E23S29
(-330",-373") 		E27-E18
(9) 		0.2 -1.5 -5.1e19
4 E68S71
(-287",-890") 		E82-E62
(20) 		0.2 -1.3 -1.5e20
5 E28N11
(-439",276") 		E31-E22
(9) 		0.1 0.8 2.2e19
6 E36S53
(-342",-712") 		E42-E30
(12) 		0.1 -0.5 -1.5e19
7 W17N28
(244",543") 		W15-W19
(4) 		0.0 -1.1 -9.9e18
8 W16N04
(258",168") 		W14-W17
(3) 		0.0 -1.4 -1.0e19
9 E02S29
(-27",-371") 		4
(6.2e02) 		-1.2 5.2 3.2e19
10 W31S82
(71",-931") 		W33-W30
(-3) 		0.0 -1.4 -3.3e19

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 4-Apr-2021 23:30 UT .