16 February 2021
⇐20210215 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210217⇒

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Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E07S67
(-45",-843") 		E78-W57
(135) 		4.7 -1.1 -1.5e21
2 E25S25
(-373",-315") 		E37-E14
(23) 		2.6 -3.1 -1.4e21
3 W26N44
(306",749") 		W09-W40
(31) 		1.1 0.4 1.1e20
4 W45N31
(585",570") 		W37-W51
(14) 		0.5 1.7 2.5e20
5 E33S46
(-369",-623") 		E37-E30
(7) 		0.1 -1.0 -2.9e19
6 E03S04
(-52",54") 		E06-W01
(7) 		0.1 -1.6 -3.1e19
7 W31S11
(492",-94") 		W26-W35
(9) 		0.1 -1.4 -2.8e19
8 W47N08
(702",215") 		W45-W49
(4) 		0.0 -1.1 -1.2e19

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 16-Feb-2021 20:30 UT .