28 March 2012
⇐20120327 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120329⇒

NOAA
5 Active Regions
11438
11442
11445
11447
11448

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W20S64
(140",-816") 		E86-W43
(129) 		3.1 0.5 1.7e33
2 E36N18
(-533",389") 		E40-E31
(9) 		0.1 7.8 2.8e32
3 W26N21
(391",435") 		W23-W29
(6) 		0.1 19.0 4.5e32

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 28-Mar-2012 23:00 UT .