31 May 2018
⇐20180530 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180601⇒

NOAA
2 Active Regions
12712
12710

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 W12S15
(187",-238") 		E24-W49
(73) 		9.1 -1.1 -2.3e33
2 E25N58
(-208",811") 		E65-W54
(119) 		3.5 0.7 3.2e33
3 W25S69
(142",-883") 		E67-W47
(114) 		1.4 -1.0 -4.1e33
4 W41S43
(457",-637") 		W35-W51
(16) 		0.3 -0.7 -2.0e32
5 W39S31
(518",-477") 		W37-W42
(5) 		0.1 -0.8 -3.1e31
6 E35N11
(-528",193") 		E38-E32
(6) 		0.1 -0.7 -1.4e31

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 31-May-2018 15:30 UT .