1 August 2019
⇐20190731 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190802⇒

NOAA
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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 E09N18
(-133",198") 		E28-W13
(41) 		5.8 1.8 1.6e21
2 E18N67
(-111",833") 		E85-W88
(173) 		4.2 1.4 1.9e21
3 W13S23
(194",-460") 		W05-W20
(15) 		0.5 1.0 7.7e19
4 E38S59
(-299",-848") 		E52-E23
(29) 		0.3 -0.2 -3.9e19
5 E22N43
(-259",584") 		E27-E16
(11) 		0.1 0.6 1.3e19
6 W25N03
(401",-31") 		W22-W27
(5) 		0.1 1.7 3.0e19
7 E16N38
(-208",505") 		E19-E13
(6) 		0.1 -0.9 -1.5e19
8 E13S12
(-207",-292") 		E14-E11
(3) 		0.1 -1.0 -1.2e19
9 E25S43
(-294",-701") 		E30-E22
(8) 		0.0 -1.1 -1.2e19

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 1-Aug-2019 23:30 UT .