3 September 2021
⇐20210902 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210904⇒

NOAA
4 Active Regions
12860
12863
12859
12861

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 E09N61
(-70",767") 		E79-W90
(169) 		6.1 0.7 1.2e21
2 W26S19
(392",-411") 		W11-W38
(27) 		2.5 -1.4 -6.6e20
3 W15N07
(238",2") 		W03-W29
(26) 		2.4 -0.2 -9.0e19
4 E35S41
(-410",-692") 		E55-E20
(35) 		1.2 -1.2 -4.2e20
5 W38N05
(583",-12") 		W33-W44
(11) 		0.3 -0.8 -4.4e19
6 E05S12
(-74",-317") 		E08-E01
(7) 		0.1 -1.8 -4.1e19
7 W16S03
(270",-163") 		W15-W18
(3) 		0.1 -1.3 -1.9e19
8 W16N29
(231",352") 		W12-W20
(8) 		0.1 -1.8 -2.3e19
9 W01N02
(17",-85") 		E01-W02
(3) 		0.1 -1.5 -1.3e19
10 W09S13
(142",-321") 		W06-W11
(5) 		0.0 -4.2 -2.6e19

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 3-Sep-2021 23:30 UT .