22 May 2017
⇐20170521 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20170523⇒

NOAA
4 Active Regions
12656
12658
12659
12657

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 -429
(-264",696") 		1.4e05
(1.9) 		9.0 -5.3 -7.1e33
2 -274
(-58",-874") 		3.2e05
(1.6) 		5.4 -7.5 -2.4e34
3 537
(738",-304") 		1.4e05
(1.4) 		5.9 -7.4 -1.0e34
4 693
(736",364") 		1.3e04
(0.1) 		5.1 -9.4 -1.2e33

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 22-May-2017 23:30 UT .