19 July 2021
⇐20210718 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210720⇒

NOAA
4 Active Regions
12842
12844
12845
12841

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 E23S07
(-364",-192") 		E44-W20
(64) 		8.7 0.1 9.0e19
2 E03N72
(-17",871") 		E70-W31
(101) 		1.7 0.9 6.0e20
3 W07S14
(118",-297") 		W06-W10
(4) 		0.1 -2.7 -3.3e19

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 19-Jul-2021 19:30 UT .