3 September 2017
⇐20170902 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170904⇒

NOAA
4 Active Regions
12673
12674
12675
12676

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 W48N56
(392",739") 		E84-W72
(156) 		6.6 0.8 7.0e33
2 E34S21
(-501",-433") 		E47-E18
(29) 		1.1 -2.3 -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 3-Sep-2017 19:30 UT .