20 February 2012
⇐20120219 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20120221⇒

NOAA
5 Active Regions
11418
11419
11420
11421
11422

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 E31S39
(-395",-525") 		E47-E03
(44) 		4.0 3.4 6.4e33
2 E42N45
(-459",743") 		E71-E13
(58) 		1.0 1.4 2.2e33
3 W08S06
(139",18") 		W05-W11
(6) 		0.1 -2.0 -4.4e31
4 W69S40
(692",-588") 		W64-W78
(14) 		0.1 -1.0 -2.1e32

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 20-Feb-2012 22:00 UT .