20 May 2017
⇐20170519 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170521⇒

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 -76
(459",-333") 		2.4e05
(6.4) 		5.8 -6.8 -1.7e34
2 189
(333",343") 		4.7e04
(1.5) 		5.6 -10.1 -4.7e33
3 -402
(-288",-570") 		5.4e04
(1.2) 		5.6 -7.5 -4.0e33
4 -353
(-202",-891") 		3.4e05
(0.8) 		4.9 -7.5 -2.5e34
5 -71
(-39",-633") 		2.5e03
(0.1) 		4.3 -5.6 -1.4e32

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 20-May-2017 23:30 UT .