17 July 2021
⇐20210716 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210718⇒

NOAA
4 Active Regions
12842
12843
12844
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 E28S08
(-440",-202") 		E43-E10
(33) 		3.3 -0.0 -2.1e19
2 E16N66
(-106",828") 		E79-W70
(149) 		2.2 1.0 7.4e20
3 W05S03
(76",-132") 		W03-W06
(3) 		0.1 2.9 3.2e19
4 E16S73
(-77",-920") 		E30-E09
(21) 		0.1 -0.9 -3.9e19
5 W22S69
(124",-904") 		W12-W29
(17) 		0.0 -1.7 -4.7e19
6 E43S07
(-645",-162") 		E45-E41
(4) 		0.0 -1.4 -1.1e19

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 17-Jul-2021 23:30 UT .