21 December 2019
⇐20191220 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20191222⇒

NOAA
0 Active Regions

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 E09S17
(-139",-255") 		E40-W28
(68) 		9.2 -0.4 -7.3e20
2 E25S68
(-156",-892") 		E62-W53
(115) 		1.6 -0.6 -2.0e21
3 W40N65
(264",893") 		E37-W57
(94) 		1.5 0.7 3.9e21

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 21-Dec-2019 20:30 UT .