22 May 2021
⇐20210521 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210523⇒

NOAA
1 Active Region
12824

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 W16N55
(145",797") 		E55-W30
(85) 		3.6 0.6 5.9e20
2 W39S75
(151",-910") 		E02-W63
(65) 		0.3 -1.0 -2.1e20

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 22-May-2021 23:30 UT .