19 May 2017
⇐20170518 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170520⇒

NOAA
3 Active Regions
12656
12658
12657

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 -396
(227",-226") 		2.5e05
(10.7) 		5.8 -7.7 -1.9e34
2 -529
(-475",-589") 		3.4e04
(0.4) 		6.4 -8.7 -2.9e33
3 -335
(-224",-895") 		2.1e05
(0.4) 		5.6 -7.2 -1.5e34

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 19-May-2017 23:30 UT .