29 April 2019
⇐20190428 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190430⇒

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 W16S23
(235",-314") 		E26-W39
(65) 		11.5 -0.4 -1.1e21
2 E16S63
(-118",-819") 		E79-W45
(124) 		4.0 -1.0 -4.7e21
3 E54S07
(-766",-78") 		E58-E49
(9) 		0.1 -0.9 -5.4e19

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 29-Apr-2019 22:00 UT .