18 November 2017
⇐20171117 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20171119⇒

NOAA
2 Active Regions
12687
12688

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 W23N20
(362",293") 		E10-W40
(50) 		4.9 1.1 1.6e33
2 E37N62
(-273",845") 		E75-W05
(80) 		2.4 0.7 3.0e33
3 W35S73
(164",-937") 		W34-W50
(16) 		0.1 -0.8 -4.2e32
4 E26N20
(-396",304") 		E28-E22
(6) 		0.1 -0.7 -1.4e31

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 18-Nov-2017 20:30 UT .