21 August 2012
20120820 Week Rotation Today Rotation Week 20120822

NOAA
7 Active Regions

Flare Forecast

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E16N06
(-263",-3")
E32-E01
(31)
3.1 -1.8 -1.2e33
2 W37S38
(453",-651")
W30-W46
(16)
0.6 2.2 1.3e33
3 W32S11
(501",-271")
W30-W35
(5)
0.1 5.3 2.8e32

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 21-Aug-2012 20:49 UT .