28 August 2021
⇐20210827 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210829⇒

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 E23S05
(-369",-187") 		E36-W01
(37) 		3.0 0.0 2.2e19
2 W08N72
(42",863") 		E85-W84
(169) 		2.7 1.1 1.1e21
3 W17N00
(279",-113") 		W01-W28
(27) 		1.4 0.1 2.4e19
4 E57S15
(-771",-313") 		E69-E45
(24) 		0.5 -0.7 -1.2e20
5 E37N01
(-574",-78") 		E40-E35
(5) 		0.0 -0.9 -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 28-Aug-2021 23:30 UT .