27 May 2017
⇐20170526 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170528⇒

NOAA
4 Active Regions
12659
12656
12658
12660

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 -388
(-168",270") 		2.7e05
(11.8) 		5.8 -5.8 -1.6e34
2 -448
(-133",-805") 		5.4e05
(4.8) 		5.5 -6.9 -3.7e34
3 -377
(51",864") 		4.8e05
(2.7) 		6.6 -5.3 -2.5e34
4 630
(675",438") 		2.1e04
(0.2) 		10.1 -5.3 -1.1e33

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 27-May-2017 23:30 UT .