28 April 2018
⇐20180427 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180429⇒

NOAA
2 Active Regions
12706
12707

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 E12N51
(-122",785") 		E58-W52
(110) 		5.9 0.7 3.7e33
2 W12S64
(86",-821") 		159
(5.0e05) 		-0.9 5.3 2.7e34
3 W15S32
(208",-444") 		W02-W23
(21) 		1.9 -0.3 -1.6e32
4 W05N19
(82",375") 		E13-W16
(29) 		1.8 -0.0 -1.8e31
5 E65S05
(-861",-44") 		E71-E61
(10) 		0.1 -0.6 -1.1e32
6 W16S07
(262",-39") 		W13-W19
(6) 		0.1 -0.9 -1.1e31
7 E29S06
(-462",-37") 		E30-E27
(3) 		0.1 -0.7 -1.2e31

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 28-Apr-2018 15:30 UT .