25 February 2017
⇐20170224 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170226⇒

NOAA
4 Active Regions
12638
12639
12636
12637

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 E37S38
(-454",-519") 		E81-E03
(78) 		8.9 -1.4 -6.7e33
2 E09S78
(-31",-918") 		E88-W79
(167) 		1.0 -1.5 -4.6e33
3 W65S19
(828",-269") 		W56-W76
(20) 		0.8 0.6 6.8e32
4 E05N11
(-84",300") 		E08-E02
(6) 		0.2 -2.2 -1.2e32

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 25-Feb-2017 20:30 UT .