19 April 2020
⇐20200418 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200420⇒

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 W16S17
(258",-205") 		E18-W34
(52) 		9.5 0.0 9.8e19
2 W02S63
(12",-810") 		E57-W47
(104) 		5.7 -1.1 -6.1e21
3 E31S21
(-454",-269") 		E41-E18
(23) 		1.9 -0.3 -1.7e20
4 W22N66
(144",904") 		E07-W29
(36) 		0.5 0.9 1.8e21
5 W41S21
(590",-277") 		W38-W44
(6) 		0.1 -0.9 -4.3e19
6 E38S08
(-583",-66") 		E41-E35
(6) 		0.1 -0.8 -2.9e19
7 E40N04
(-612",128") 		E42-E38
(4) 		0.0 -1.1 -2.1e19

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 19-Apr-2020 19:30 UT .