21 August 2019
⇐20190820 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190822⇒

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 W16N10
(258",48") 		E11-W31
(42) 		3.2 -0.1 -5.3e19
2 W10N73
(46",870") 		E84-W91
(175) 		2.3 1.3 1.1e21
3 W20N26
(291",316") 		E06-W35
(41) 		2.2 -0.2 -7.5e19
4 E40S11
(-606",-263") 		E47-E30
(17) 		1.8 -1.4 -5.6e20
5 W18S63
(132",-887") 		E45-W54
(99) 		1.1 -1.0 -5.2e20
6 W10S39
(129",-685") 		W07-W14
(7) 		0.1 -1.4 -3.9e19
7 W34S05
(529",-171") 		W32-W36
(4) 		0.1 -0.8 -1.6e19
8 W56S21
(735",-396") 		W49-W64
(15) 		0.1 -0.7 -2.1e19
9 E36N08
(-555",45") 		E40-E32
(8) 		0.1 -0.8 -1.4e19
10 W12N38
(159",493") 		W10-W14
(4) 		0.0 -1.3 -9.4e18

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 21-Aug-2019 23:40 UT .