1 May 2017
⇐20170430 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170502⇒

NOAA
4 Active Regions
12651
12653
12654
12652

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 E07S19
(-109",-248") 		E35-W22
(57) 		9.1 -0.1 -1.8e32
2 E21S65
(-142",-836") 		E81-W77
(158) 		4.1 -1.1 -6.3e33
3 E22N66
(-146",894") 		E66-W33
(99) 		0.9 0.5 1.4e33
4 W45N59
(346",840") 		W29-W58
(29) 		0.5 0.7 1.1e33
5 E05S43
(-61",-597") 		E08-E01
(7) 		0.1 -0.7 -3.1e31
6 W08N10
(125",232") 		W05-W09
(4) 		0.1 -1.1 -1.4e31
7 W23N29
(325",519") 		W21-W26
(5) 		0.0 -0.6 -1.2e31
8 W12S32
(163",-449") 		W10-W13
(3) 		0.0 -1.0 -1.3e31

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 1-May-2017 19:30 UT .