31 January 2012
⇐20120130 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120201⇒

NOAA
5 Active Regions
11408
11410
11411
11412
11413

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E21S17
(-331",-198") 		E35-E03
(32) 		1.5 -2.3 -9.1e32
2 W36S75
(152",-912") 		E54-W86
(140) 		0.9 0.9 2.7e33
3 W01N12
(24",294") 		E05-W10
(15) 		0.9 -9.5 -1.8e33

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 31-Jan-2012 22:00 UT .