17 January 2019
⇐20190116 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20190118⇒

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 E38N04
(-605",127") 		E54-E17
(37) 		3.0 1.0 1.3e21
2 W34S67
(216",-868") 		E81-W74
(155) 		2.9 -1.0 -5.7e21
3 W06S28
(88",-383") 		E05-W14
(19) 		1.4 0.3 1.1e20
4 W21N66
(137",921") 		E15-W47
(62) 		0.6 1.1 2.4e21
5 W49S37
(586",-548") 		W44-W55
(11) 		0.2 -1.2 -1.5e20
6 E31S19
(-470",-252") 		E33-E28
(5) 		0.1 -1.3 -2.4e19
7 W09S13
(151",-142") 		W08-W10
(2) 		0.0 -1.0 -8.3e18

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 17-Jan-2019 18:00 UT .