18 October 2020
⇐20201017 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20201019⇒

NOAA
2 Active Regions
12776
12775

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 E28N58
(-238",768") 		E68-W35
(103) 		6.8 0.8 1.6e21
2 W18S62
(143",-888") 		E49-W47
(96) 		1.7 -0.5 -3.4e20
3 W16S26
(241",-498") 		W05-W23
(18) 		1.1 -0.9 -1.9e20
4 W29S03
(472",-135") 		W26-W34
(8) 		0.2 -1.6 -5.1e19
5 W27S40
(339",-679") 		W24-W32
(8) 		0.1 -0.5 -1.2e19
6 E38N23
(-551",307") 		E41-E36
(5) 		0.1 -1.2 -1.6e19
7 E50N10
(-729",104") 		E53-E47
(6) 		0.1 -0.4 -5.7e18
8 W24S06
(396",-190") 		W22-W26
(4) 		0.1 -1.0 -9.6e18
9 E35N28
(-486",376") 		E37-E31
(6) 		0.0 1.7 1.5e19
10 E34N37
(-434",518") 		E36-E32
(4) 		0.0 -0.6 -5.5e18

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 18-Oct-2020 19:30 UT .