Observation by Andrew Thomas: New Observation

Uploaded by

Andrew Thomas

Observer

Andrew Thomas

Observed

2018 Feb 07 - 13:31

Uploaded

2018 Feb 12 - 10:46

Objects

The Sun

Equipment

UKRAA VLF receivers
0.6m frame antenna at 23.4kHz
1.0m frame antenna at 19.6kHz

Location

Kent UK

Target name

Sudden Ionospheric Disturbance (SID)

Title

New Observation

About this image

I have recently added a second VLF receiver and a 1m frame antenna. I now record on two VLF channels 19.6kHz from Anthorn nr Carlisle and 23.4kHz Rhauderfehn in northern Germany. This chart shows the SID resulting from a C8.1 solar flare at 13:31 on 2018_02_07 recorded by the NASA GOES satellite. It is interesting to see that each path shows a different effect; one constrictive and the other destructive interference between the ground and sky waves.

There is a faint hint of a second SID on the 19.6kHz signal due to the C1.8 flare at 14:35 but this is not seen not on the 23.4kHz signal. However this may just be noise!

Files associated with this observation

Slide1.JPG (75.6 kB)

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Dr Andrew Smith, Jeremy Shears, David Basey, Andy Wilson, Peter Carson, Peter Mulligan, Matt Williams, Andrew Thomas

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