7 May 2021
⇐20210506 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210508⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W35N04
(540",111") 		W03-W61
(58) 		4.7 0.1 1.0e20
2 W00S64
(3",-829") 		E76-W33
(109) 		3.0 -1.1 -1.0e21
3 W05N50
(48",766") 		E54-W17
(71) 		2.1 0.6 3.2e20
4 W26S38
(325",-550") 		W07-W42
(35) 		1.8 -0.8 -2.9e20
5 E32S11
(-496",-130") 		E34-E29
(5) 		0.2 -1.4 -4.6e19
6 W23N33
(315",556") 		W19-W28
(9) 		0.1 -0.8 -2.1e19
7 W35S35
(445",-504") 		W30-W38
(8) 		0.1 -1.1 -2.9e19
8 W04S08
(63",-67") 		W03-W05
(2) 		0.0 -1.7 -9.5e18
9 W17S11
(274",-125") 		W16-W19
(3) 		0.0 3.1 1.8e19

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 7-May-2021 23:30 UT .