22 April 2017
⇐20170421 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170423⇒

NOAA
3 Active Regions
12651
12652
12653

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 E14S30
(-201",-413") 		E53-W25
(78) 		13.4 -1.3 -5.0e33
2 E29S21
(-430",-280") 		E32-E26
(6) 		0.1 -0.8 -3.8e31
3 E53S77
(-175",-914") 		E72-E30
(42) 		0.1 -1.4 -9.6e32

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 22-Apr-2017 19:30 UT .