9 July 2021
⇐20210708 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210710⇒

NOAA
3 Active Regions
12839
12840
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 E12S32
(-162",-550") 		E46-W34
(80) 		17.5 -0.8 -2.8e21
2 E02N68
(-15",847") 		E59-W78
(137) 		3.3 1.0 1.1e21
3 W40S13
(589",-259") 		W36-W42
(6) 		0.2 -1.0 -4.1e19
4 W30S71
(153",-908") 		W21-W36
(15) 		0.1 -0.7 -2.9e19
5 W37S24
(519",-429") 		W34-W40
(6) 		0.1 -2.0 -2.4e19
6 W33S10
(508",-211") 		W31-W36
(5) 		0.0 -2.3 -2.0e19

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 9-Jul-2021 23:30 UT .