25 May 2017
⇐20170524 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170526⇒

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 -565
(-408",18") 		6.2e04
(2.3) 		6.1 -5.3 -3.3e33
2 -403
(-27",-876") 		4.2e05
(2.0) 		5.2 -7.1 -2.9e34
3 -595
(-448",477") 		9.1e04
(1.9) 		5.8 -6.0 -5.5e33
4 -437
(-201",864") 		4.5e05
(1.8) 		6.6 -5.8 -2.6e34
5 -556
(-405",-717") 		1.2e05
(1.0) 		5.7 -6.7 -8.2e33
6 215
(315",455") 		2.6e04
(0.7) 		13.1 -5.5 -1.5e33

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 25-May-2017 23:30 UT .