23 August 2017
⇐20170822 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170824⇒

NOAA
2 Active Regions
12671
12672

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 E06N75
(-25",879") 		E64-W76
(140) 		1.5 0.9 2.8e33
2 E28S09
(-434",-249") 		E35-E19
(16) 		1.2 -1.4 -5.1e32
3 E42S54
(-373",-811") 		E62-E33
(29) 		0.4 -0.2 -2.5e32
4 E06S71
(-33",-927") 		E26-W15
(41) 		0.1 -0.7 -7.0e32

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 23-Aug-2017 19:30 UT .