28 April 2019
⇐20190427 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190429⇒

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 W12S16
(191",-194") 		E18-W41
(59) 		9.1 -0.4 -7.2e20
2 E10S65
(-72",-832") 		E71-W73
(144) 		3.9 -1.0 -5.0e21
3 W33S32
(437",-459") 		W06-W48
(42) 		3.3 0.2 2.3e20
4 W04N69
(25",916") 		E25-W26
(51) 		0.4 0.6 8.4e20
5 W41S14
(614",-177") 		W38-W45
(7) 		0.2 -1.1 -7.7e19
6 E32S32
(-425",-445") 		E34-E29
(5) 		0.0 -0.9 -1.9e19
7 E05N24
(-82",452") 		E07-E04
(3) 		0.0 -1.5 -1.8e19

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 28-Apr-2019 22:00 UT .