31 May 2017
20170530 Week Rotation Today Rotation Week 20170601

NOAA
0 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 -375
(92",-838")
5.0e05
(3.6)
5.0 -6.9 -3.5e34
2 -320
(-2",872")
3.7e05
(1.9)
6.3 -5.5 -2.0e34
3 149
(256",-3")
1.2
(1.4)
-4.7 460.9
4 -175
(-139",-45")
2.4e03
(0.1)
5.6 -15.8 -3.8e32

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-May-2017 23:30 UT .