17 March 2021
⇐20210316 ⇐Week ⇐Rotation Today Rotation⇒ Week⇒ 20210318⇒

NOAA
3 Active Regions
12808
12810
12809

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 E15S52
(-158",-684") 		E45-W79
(124) 		12.8 -1.6 -4.7e21
2 W40N03
(622",140") 		W33-W47
(14) 		0.4 0.6 5.1e19
3 E01N19
(-12",426") 		E04-W04
(8) 		0.1 -0.7 -1.7e19
4 W55N03
(789",113") 		W52-W59
(7) 		0.1 -0.9 -1.9e19
5 E04N05
(-63",201") 		E05-E01
(4) 		0.1 1.0 9.2e18

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-Mar-2021 20:30 UT .