23 May 2020
⇐20200522 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200524⇒

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 E16S57
(-143",-783") 		E41-W60
(101) 		5.1 -0.9 -4.2e21
2 W16S04
(264",-39") 		W02-W25
(23) 		1.8 0.3 1.0e20
3 W35N68
(205",885") 		W25-W67
(42) 		0.3 0.5 7.1e20
4 W24N17
(373",303") 		W23-W26
(3) 		0.1 -0.7 -1.3e19

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 23-May-2020 19:30 UT .