27 February 2020
⇐20200226 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200228⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W00S55
(1",-720") 		E85-W51
(136) 		9.7 -0.5 -2.8e21
2 E25S19
(-389",-210") 		E42-W04
(46) 		3.3 -0.4 -3.6e20
3 E21N20
(-332",438") 		E24-E18
(6) 		0.2 -0.8 -4.4e19
4 E45S08
(-676",-51") 		E48-E42
(6) 		0.1 -0.8 -3.7e19
5 E70S47
(-620",-679") 		E76-E62
(14) 		0.1 -1.2 -2.8e20
6 E31N00
(-504",107") 		E33-E29
(4) 		0.0 -1.1 -1.7e19
7 W23S27
(340",-331") 		W22-W25
(3) 		0.0 -0.8 -9.8e18

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 27-Feb-2020 20:30 UT .