4 February 2018
⇐20180203 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180205⇒

NOAA
2 Active Regions
12697
12698

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 W08N46
(95",775") 		E28-W57
(85) 		8.0 0.8 4.9e33
2 W04S69
(23",-865") 		E85-W85
(170) 		3.9 -1.3 -7.2e33
3 W27S32
(381",-427") 		W00-W44
(44) 		2.1 -0.1 -1.2e32
4 W04S25
(55",-311") 		W01-W06
(5) 		0.1 -1.3 -3.3e31
5 E29S10
(-466",-76") 		E31-E27
(4) 		0.1 -0.8 -1.2e31

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-Feb-2018 20:30 UT .