4 July 2018
⇐20180703 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20180705⇒

NOAA
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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 W01N64
(4",828") 		E71-W43
(114) 		4.0 0.9 4.4e21
2 W13S18
(195",-347") 		E04-W26
(30) 		2.1 -0.1 -7.8e19
3 E20S10
(-324",-210") 		E31-E06
(25) 		0.9 -0.9 -2.1e20
4 W26N14
(400",180") 		W22-W30
(8) 		0.2 -0.7 -4.0e19
5 W39N09
(588",105") 		W37-W41
(4) 		0.1 -0.8 -3.8e19
6 W35S14
(523",-268") 		W32-W39
(7) 		0.1 -1.1 -2.4e19

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 4-Jul-2018 23:10 UT .