21 December 2015
⇐20151220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20151222⇒

NOAA
4 Active Regions
12468
12470
12469
12471

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 E20S56
(-187",-795") 		E74-W22
(96) 		6.3 -2.3 -1.4e34
2 E28S40
(-354",-606") 		E32-E25
(7) 		0.0 -2.0 -5.2e31

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 21-Dec-2015 21:35 UT .