31 July 2018
20180730 Week Rotation Today Rotation Week 20180801

NOAA
0 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W20S15
(307",-336")
E19-W45
(64)
9.1 -0.2 -6.7e20
2 E07N67
(-45",829")
E72-W64
(136)
4.6 1.0 5.6e21
3 E14S70
(-75",-917")
E33-W06
(39)
0.2 -1.2 -1.3e21
4 W40S03
(608",-118")
W36-W43
(7)
0.1 -0.7 -3.3e19
5 W23S28
(330",-524")
W21-W25
(4)
0.1 -0.6 -1.3e19
6 W20S72
(99",-923")
W09-W30
(21)
0.0 -1.6 -7.0e20

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 31-Jul-2018 23:10 UT .