29 August 2021
⇐20210828 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210830⇒

NOAA
4 Active Regions
12859
12860
12861
12862

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 W02S03
(41",-165") 		E33-W40
(73) 		5.0 -0.2 -1.6e20
2 W18N69
(105",841") 		E86-W42
(128) 		3.5 1.0 1.2e21
3 E45S12
(-658",-271") 		E53-E35
(18) 		1.8 -0.8 -3.5e20
4 W03N28
(42",339") 		E03-W07
(10) 		0.3 2.4 1.0e20
5 E35N01
(-547",-77") 		E39-E30
(9) 		0.2 -0.7 -2.0e19
6 W41S03
(619",-132") 		W37-W44
(7) 		0.1 -0.7 -1.1e19
7 E27N59
(-228",753") 		E34-E21
(13) 		0.1 -0.5 -8.4e18

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-Aug-2021 23:30 UT .