20 August 2015
⇐20150819 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150821⇒

NOAA
4 Active Regions
12401
12403
12400
12402

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W32N49
(332",645") 		E18-W52
(70) 		8.1 0.9 4.7e33
2 E06S04
(-93",-176") 		E12-W05
(17) 		2.3 2.3 1.0e33
3 E19S20
(-294",-421") 		E25-E13
(12) 		0.3 10.6 1.0e33

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-Aug-2015 20:35 UT .