18 April 2018
⇐20180417 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180419⇒

NOAA
2 Active Regions
12704
12705

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 W21S24
(313",-318") 		E17-W51
(68) 		9.9 -0.7 -2.0e33
2 E22S65
(-152",-832") 		E81-W81
(162) 		3.7 -0.9 -4.4e33
3 W39N01
(606",85") 		W33-W45
(12) 		0.3 -0.7 -7.7e31
4 W30S06
(480",-18") 		W29-W32
(3) 		0.0 -1.1 -1.4e31

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 18-Apr-2018 15:30 UT .