30 May 2021
⇐20210529 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210531⇒

NOAA
3 Active Regions
12824
12827
12825

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 E10N13
(-162",221") 		E33-W21
(54) 		16.0 0.0 4.2e19
2 E01N67
(-9",876") 		E69-W35
(104) 		1.8 0.8 5.7e20

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-May-2021 23:30 UT .