30 April 2019
⇐20190429 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190501⇒

NOAA
0 Active Regions

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 W20S47
(224",-646") 		117
(6.2e05) 		-0.6 5.2 3.2e22
2 W27N09
(427",219") 		W18-W39
(21) 		2.3 -0.3 -2.4e20
3 E24S23
(-363",-320") 		E28-E21
(7) 		0.2 0.6 4.7e19
4 E44S03
(-661",3") 		E48-E40
(8) 		0.1 -0.8 -4.0e19
5 W35N15
(525",306") 		W33-W36
(3) 		0.1 -0.6 -1.4e19
6 E32N21
(-478",396") 		E35-E29
(6) 		0.1 -0.7 -1.7e19

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 30-Apr-2019 22:00 UT .