18 May 2017
⇐20170517 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170519⇒

NOAA
2 Active Regions
12656
12657

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 -649
(-222",-217") 		2.9e05
(12.7) 		5.2 -7.8 -2.2e34
2 22
(193",903") 		2.1e05
(0.3) 		6.0 -5.0 -1.0e34
3 -281
(-218",-901") 		5.4e04
(0.1) 		4.7 -7.0 -3.7e33

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-May-2017 23:30 UT .