23 August 2021
⇐20210822 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210824⇒

NOAA
3 Active Regions
12859
12855
12858

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 W16N63
(116",790") 		E89-W42
(131) 		4.0 0.9 1.0e21
2 W03N13
(56",93") 		E02-W06
(8) 		1.1 -1.7 -2.7e20
3 W08S29
(116",-555") 		E02-W15
(17) 		0.5 -4.9 -4.7e20
4 E04N04
(-63",-52") 		E06-E01
(5) 		0.1 -1.3 -1.3e19

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 23-Aug-2021 23:30 UT .