27 July 2017
⇐20170726 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170728⇒

NOAA
1 Active Region
12668

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 -420
(-153",-297") 		5.1
(-0.4) 		-6.6 367.0
2 -498
(-203",852") 		5.5e05
(2.6) 		6.3 -5.8 -3.2e34
3 -280
(-80",-888") 		3.3e05
(1.2) 		5.6 -6.7 -2.2e34
4 195
(231",-873") 		2.2e04
(0.1) 		5.7 -6.7 -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 27-Jul-2017 23:30 UT .