18 August 2020
⇐20200817 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20200819⇒

NOAA
1 Active Region
12771

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 E02N10
(-31",45") 		E30-W37
(67) 		8.7 -0.3 -3.6e20
2 W04N70
(23",849") 		E65-W64
(129) 		2.6 1.3 1.2e21
3 E18S13
(-288",-321") 		E30-E07
(23) 		1.4 -0.6 -1.5e20
4 W26S62
(199",-876") 		E06-W36
(42) 		0.9 -0.6 -2.6e20
5 E38N11
(-579",87") 		E46-E27
(19) 		0.7 -0.5 -8.1e19
6 W42S20
(598",-394") 		W35-W47
(12) 		0.4 -1.3 -1.3e20
7 W24N07
(378",9") 		W22-W26
(4) 		0.1 -1.4 -2.4e19
8 W39S05
(598",-172") 		W37-W42
(5) 		0.1 -0.9 -1.9e19

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 18-Aug-2020 19:00 UT .