22 August 2015
⇐20150821 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20150823⇒

NOAA
4 Active Regions
12401
12403
12404
12402

Flare Forecast
Flare Forecast
MM MotD

Coronal Holes


Today's Coronal Hole Properties
CHIMERA Number
Centroid
[Heliocentric]
Width
[°]
Area
[%]
< B >
[G]
< Φ >
[Mx]
1 W56N49
(520",667") 		W09-W72
(63) 		3.1 0.7 3.2e33
2 W07S17
(107",-392") 		E03-W13
(16) 		1.8 4.8 2.4e33
3 W25S09
(397",-249") 		W12-W33
(21) 		1.7 3.1 1.5e33
4 E49N09
(-711",66") 		E53-E42
(11) 		0.8 -5.2 -2.5e33
5 W22N32
(298",411") 		W18-W25
(7) 		0.1 -0.8 -2.1e31

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-Aug-2015 23:35 UT .