15 April 2020
⇐20200414 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200416⇒

NOAA
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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 E18S57
(-159",-754") 		E65-W71
(136) 		7.8 -0.6 -3.5e21
2 W15N04
(247",151") 		E03-W29
(32) 		4.8 0.1 1.0e20
3 E19S07
(-305",-37") 		E33-E01
(32) 		3.7 -0.2 -1.3e20
4 E35N66
(-229",898") 		E58-W18
(76) 		0.9 0.6 2.8e21
5 E14N18
(-225",376") 		E17-E11
(6) 		0.2 -1.4 -6.1e19
6 E43N07
(-648",183") 		E45-E41
(4) 		0.1 -0.9 -3.3e19

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 15-Apr-2020 19:30 UT .