( Specimen : Type II Radio Burst )
1740 UT on Sept. 7, 2005, Earth-orbiting satellites detected
a major solar flare,
X18-class or stronger, coming from the Sun's
east limb. The source of the eruption was
sunspot region 808 (old returning region 798), which caused auroras
Here is a three minute audio recording of the primary shockfront
beginning at 1740 UT
recorded with a stereo radio telescope at the frequencies of 22.222 MHz
and 22.714 MHz.
This was a very fast plasma eruption and a superstrong coronal mass ejection.
Headphones strongly recommended for full stereo spatial effect. And
it is best played at moderate to loud volume.
Click below for soundfile.
2.8 Mb 3 minutes long
Timeline of recording:
0 sec to 36 sec beginning to burst
at 38 seconds : ascenscion
at 1 min 28 secs strong shockfront kicks in and peaks for a minute
at 2 min 40 sec down slope of shockfront
Movies and visual record of event at
For Sudden Ionospheric Disturbance Researchers
here is my 18.7 MHz chart.
More solar recordings
35.50 N -105.88 W
New Mexico USA