1 August 2021
⇐20210731 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210802⇒

NOAA
3 Active Regions
12846
12847
12849

Flare Forecast
Flare Prediction System
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E14N58
(-122",753") 		E87-W88
(175) 		7.0 0.9 1.7e21
2 E37S13
(-558",-280") 		E66-W03
(69) 		4.8 -0.5 -4.9e20
3 E11S21
(-172",-433") 		E14-E08
(6) 		0.1 -3.4 -3.4e19

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 1-Aug-2021 23:30 UT .