4 October 2019
⇐20191003 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20191005⇒

NOAA
1 Active Region
12749

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 E12N02
(-197",-66") 		E24-W11
(35) 		7.9 0.0 4.1e19
2 W09N68
(55",846") 		E89-W62
(151) 		4.1 1.0 1.4e21
3 W25N17
(384",178") 		W15-W36
(21) 		1.6 -0.1 -2.4e19
4 W25N47
(272",636") 		W12-W33
(21) 		0.5 0.9 9.5e19
5 W36S20
(535",-403") 		W31-W43
(12) 		0.3 -0.8 -4.9e19
6 E21S63
(-158",-895") 		E31-E01
(30) 		0.3 -0.9 -1.4e20
7 E32N05
(-508",-6") 		E35-E29
(6) 		0.1 -0.6 -1.5e19

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 4-Oct-2019 23:40 UT .