Coronal holes Help

On this page you will find all the information you need to spot any coronal holes on the earth-facing solar disk. Coronal holes are the source of fast solar wind streams which sometimes have the potential to produce minor to moderate geomagnetic storms. If our automated detection system recently detected an earth-facing coronal hole it will also be mentioned on this page.

SDO/AIA 193

SDO/AIA 193 Ångström wavelength

SDO/AIA 211

SDO/AIA 211 Ångström wavelength

Coronal hole detection map

Coronal hole detection map
Current data suggest that it is not possible to see aurora now at middle latitudes
The solar wind speed is currently moderately high (591.2 km/sec.)

Latest news

Today's space weather

Auroral activity Minor Severe
High latitude 30% 30%
Middle latitude 10% 1%
Predicted Kp max 4
Solar activity
M-class solar flare 1%
X-class solar flare 1%
Moon phase
Waxing Crescent

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Space weather facts

Last X-flare:2017/09/10X8.2
Last M-flare:2017/10/20M1.0
Last geomagnetic storm:2018/01/14Kp5 (G1)
Number of spotless days in 2018:18
Current stretch spotless days:1

This day in history*

Solar flares
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32011M1.3
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ApG
1199980G3
2199836G3
3200532G2
4201629G1
5201121G1
*since 1994

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