18 February 2015
⇐20150217 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150219⇒

NOAA
4 Active Regions
12282
12284
12285
12283

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W22N42
(267",727") 		E13-W36
(49) 		4.0 1.8 5.5e33
2 E01S64
(-4",-816") 		E87-W30
(117) 		3.8 -1.1 -4.0e33
3 E20S19
(-311",-212") 		E21-E18
(3) 		0.0 -9.2 -9.9e31
4 E06S46
(-65",-611") 		E08-E03
(5) 		0.0 -3.0 -5.2e31

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 18-Feb-2015 22:35 UT .