15 May 2018
⇐20180514 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180516⇒

NOAA
2 Active Regions
12708
12709

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 W12S22
(179",-318") 		E34-W42
(76) 		8.4 -0.2 -4.0e32
2 E37S69
(-205",-874") 		E77-W24
(101) 		1.4 -1.1 -4.1e33
3 E51N29
(-645",484") 		E56-E44
(12) 		0.9 1.0 8.7e32
4 W27N69
(153",900") 		E06-W42
(48) 		0.6 1.3 3.0e33
5 E41N48
(-418",730") 		E45-E49
(-4) 		0.5 0.7 4.6e32
6 E08N21
(-129",379") 		E11-E02
(9) 		0.4 -0.8 -8.2e31
7 W22S27
(314",-400") 		W19-W23
(4) 		0.0 -1.0 -1.3e31
8 W34S05
(529",-52") 		W32-W36
(4) 		0.0 -1.4 -1.8e31

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 15-May-2018 15:30 UT .