17 May 2019
⇐20190516 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190518⇒

NOAA
1 Active Region
12741

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 E11S22
(-170",-312") 		E34-W26
(60) 		5.9 -0.3 -4.3e20
2 W02S60
(15",-801") 		E55-W55
(110) 		4.4 -0.7 -3.2e21
3 W12N24
(176",417") 		E14-W26
(40) 		2.7 0.1 6.7e19
4 W12N65
(85",874") 		E66-W72
(138) 		1.9 0.8 3.1e21
5 E37S35
(-464",-517") 		E51-E22
(29) 		1.1 -0.8 -5.3e20
6 E35N23
(-502",404") 		E38-E31
(7) 		0.1 -0.6 -2.7e19
7 E46S10
(-673",-139") 		E49-E43
(6) 		0.0 -0.7 -1.7e19

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 17-May-2019 22:00 UT .