12 August 2021
⇐20210811 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210813⇒

NOAA
4 Active Regions
12854
12855
12852
12853

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 W25N67
(156",829") 		E79-W59
(138) 		4.0 1.1 1.4e21
2 W19S63
(144",-883") 		E06-W26
(32) 		0.6 -0.9 -2.6e20
3 W44S62
(306",-868") 		W33-W56
(23) 		0.1 -0.7 -6.5e19
4 W35S43
(398",-707") 		W33-W40
(7) 		0.1 -1.9 -4.6e19
5 W25N46
(282",611") 		W22-W29
(7) 		0.1 -0.6 -9.1e18

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 12-Aug-2021 23:30 UT .