6 August 2021
⇐20210805 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210807⇒

NOAA
3 Active Regions
12850
12851
12852

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 W20N01
(321",-83") 		E29-W58
(87) 		13.3 -0.4 -8.8e20
2 E04N61
(-31",776") 		E76-W68
(144) 		5.8 0.6 9.1e20
3 E27S41
(-327",-687") 		E37-E11
(26) 		1.3 -1.2 -4.0e20
4 E39S64
(-262",-878") 		E55-E32
(23) 		0.3 -0.5 -9.7e19
5 W52N26
(670",357") 		W48-W56
(8) 		0.1 2.4 5.2e19
6 E19N11
(-300",81") 		E20-E17
(3) 		0.1 -0.9 -9.2e18
7 E49S39
(-561",-639") 		E52-E47
(5) 		0.1 -1.5 -3.1e19
8 E49S48
(-476",-745") 		E54-E44
(10) 		0.1 -1.0 -2.4e19
9 W16N25
(231",307") 		W14-W17
(3) 		0.0 -1.0 -6.4e18

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 6-Aug-2021 23:30 UT .