4 May 2017
⇐20170503 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170505⇒

NOAA
2 Active Regions
12654
12653

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 W05S64
(38",-826") 		E75-W57
(132) 		5.2 -1.0 -6.1e33
2 -272
(860",W00N61") 		83
(3.6e05) 		0.8 6.6 2.4e34
3 W29S20
(430",-274") 		W17-W39
(22) 		2.1 0.1 5.0e31
4 W16S29
(231",-412") 		W08-W21
(13) 		0.3 -0.8 -6.6e31
5 W11S38
(141",-542") 		W05-W15
(10) 		0.3 -0.9 -8.8e31
6 E02S26
(-28",-355") 		E03-W01
(4) 		0.0 -1.4 -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-May-2017 23:30 UT .