29 July 2021
⇐20210728 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210730⇒

NOAA
4 Active Regions
12846
12847
12848
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 E13N65
(-93",813") 		E76-W88
(164) 		4.7 0.8 1.1e21
2 W37N11
(562",105") 		W34-W41
(7) 		0.1 -0.8 -1.3e19
3 W03N02
(41",-60") 		W01-W04
(3) 		0.0 -1.2 -8.0e18
4 E54S04
(-761",-118") 		E56-E51
(5) 		0.0 -0.8 -7.6e18

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 29-Jul-2021 23:30 UT .