21 March 2018
⇐20180320 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180322⇒

NOAA
2 Active Regions
12701
12702

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 E03S47
(-36",-616") 		E75-W40
(115) 		15.1 -0.8 -4.9e33
2 W25N02
(406",144") 		W14-W39
(25) 		1.9 0.1 5.0e31
3 W34N18
(509",395") 		W30-W36
(6) 		0.1 2.0 9.9e31
4 W48S24
(658",-314") 		W46-W52
(6) 		0.0 -1.3 -3.4e31

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-Mar-2018 20:30 UT .