9 April 2021
⇐20210408 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210410⇒

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 W25S04
(405",26") 		E20-W55
(75) 		9.5 0.1 1.1e20
2 W08S66
(52",-834") 		E85-W37
(122) 		3.2 -1.2 -1.2e21
3 E01N26
(-16",508") 		E11-W12
(23) 		1.2 1.0 2.2e20
4 W09N14
(145",335") 		W03-W15
(12) 		0.5 -0.8 -6.6e19
5 E51S14
(-721",-175") 		E54-E47
(7) 		0.1 -0.6 -1.2e19
6 W44S04
(666",11") 		W42-W47
(5) 		0.0 -1.1 -9.7e18

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 9-Apr-2021 23:30 UT .