17 May 2017
⇐20170516 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170518⇒

NOAA
2 Active Regions
12656
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 -667
(-409",-310") 		2.6e05
(7.8) 		5.7 -7.4 -1.9e34
2 -70
(330",837") 		4.8e05
(1.6) 		5.9 -5.4 -2.6e34
3 -508
(-444",306") 		2.4e04
(0.7) 		6.3 -10.1 -2.4e33
4 -386
(-299",396") 		1.5e04
(0.5) 		5.0 -8.9 -1.3e33

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 17-May-2017 23:30 UT .