8 April 2021
20210407 Week Rotation Today Rotation Week 20210409

NOAA
1 Active Region

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W25N06
(404",184")
W01-W49
(48)
6.3 0.1 1.2e20
2 E19N00
(-307",101")
E38-W06
(44)
4.6 0.1 5.6e19
3 E02S65
(-10",-821")
E56-W25
(81)
3.2 -1.0 -9.4e20
4 E15N31
(-208",573")
E25-W14
(39)
1.8 0.9 3.0e20
5 W35S14
(532",-156")
W33-W37
(4)
0.0 -1.9 -1.7e19
6 W18N38
(228",664")
W15-W20
(5)
0.0 -1.0 -9.5e18
7 W45N03
(681",124")
W43-W47
(4)
0.0 -1.2 -1.1e19

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 8-Apr-2021 23:30 UT .