4 April 2018
⇐20180403 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180405⇒

NOAA
1 Active Region
12703

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 W25N54
(234",830") 		E55-W44
(99) 		4.0 0.9 5.3e33
2 E40N04
(-613",142") 		E69-E19
(50) 		2.3 -1.0 -1.0e33
3 W19S73
(91",-885") 		E79-W86
(165) 		2.2 -0.5 -2.1e33
4 W30S36
(387",-484") 		W26-W34
(8) 		0.1 0.7 3.6e31
5 W33N25
(472",479") 		W31-W34
(3) 		0.0 6.0 1.3e32
6 W27S18
(421",-208") 		W25-W29
(4) 		0.0 6.0 6.8e31

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-Apr-2018 23:30 UT .