31 July 2020
⇐20200730 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200801⇒

NOAA
2 Active Regions
12767
12768

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 W18N47
(198",627") 		E87-W45
(132) 		12.0 0.6 1.5e21
2 E42S04
(-627",-134") 		E45-E38
(7) 		0.2 1.2 4.8e19
3 W36S25
(504",-469") 		W32-W39
(7) 		0.1 0.7 1.6e19
4 W35N10
(535",94") 		W32-W38
(6) 		0.1 -0.8 -1.4e19
5 E07S71
(-38",-919") 		E15-W03
(18) 		0.1 -0.8 -4.4e19

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 31-Jul-2020 19:00 UT .