21 March 2019
⇐20190320 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190322⇒

NOAA
2 Active Regions
12735
12736

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 E34S26
(-486",-339") 		E60-E08
(52) 		4.6 -0.6 -1.0e21
2 E21S07
(-350",-12") 		E34-W01
(35) 		2.0 -0.3 -1.6e20
3 E48S66
(-288",-844") 		E87-W46
(133) 		1.9 -0.7 -2.6e21
4 W44S66
(272",-842") 		W14-W61
(47) 		1.6 -1.1 -3.3e21
5 E27N58
(-233",867") 		E62-E11
(51) 		0.9 0.5 1.1e21
6 W25S30
(354",-390") 		W21-W30
(9) 		0.1 -1.3 -4.3e19

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-2019 20:30 UT .