2 September 2017
⇐20170901 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170903⇒

NOAA
4 Active Regions
12672
12673
12674
12675

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 W37N50
(369",663") 		E85-W66
(151) 		11.4 0.6 5.3e33
2 E48S20
(-663",-403") 		E60-E36
(24) 		0.5 -1.2 -5.2e32

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 2-Sep-2017 19:30 UT .