30 June 2021
⇐20210629 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210701⇒

NOAA
3 Active Regions
12835
12836
12837

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 E22N08
(-351",89") 		E32-W03
(35) 		3.7 -0.2 -1.0e20
2 W42N66
(252",851") 		E24-W83
(107) 		1.5 0.8 5.6e20
3 E53N64
(-334",833") 		E70-E52
(18) 		0.4 0.5 8.4e19
4 E30N35
(-390",511") 		E33-E27
(6) 		0.1 -0.5 -7.1e18

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 30-Jun-2021 19:30 UT .