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Advanced Physics Projects for School & Home |
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| opensource, real science on a budget |
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Advanced Physics Projects for School & Home |
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| opensource, real science on a budget |
Early on Saturday 23 March 2024, the Sun released a strong X1.1 solar flare, the most powerful possible type, from a particularly active region pointing directly towards Earth. The earth field magnetometer detected a sharp variation in the earths magnetic field corresponding to the arrival of a bubble of solar material ejected by this C.M.E. 40 hours later. A similar signal was recorded by B.G.S. magnetometers in Scotland. Comparison of this system’s plots with those from professional geophysics magnetometry stations help validate this system as capable of generating research grade data at low cost
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We've been exploring techniques to 'visualise' infrasound signals. Sifting frequencies up to the audible range is an interesting alternative to graphical presentation. From Nathan's detection of the Tonga eruption (strictly Hunga Tonga–Hunga Ha'apai). This video is the primary pulse from Tonga sped up 500x. Thanks to https://sonify.readthedocs.io/en/latest/index.html for the base code.
Nathan's report on his observations here - Tonga Eruption Report.
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Both Infrasound monitors detected a curious sharp pressure spike at 12:24 U.T.C.
No-one seeems to have heard anything, such as a sonic boom.
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We took a trip to a local windfarm with an infrasound system. Having filmed the turbine (vid) we determined a 'blade pass frequency' of 0.75Hz. We could reasonably expect this to be the fundamental frequency and see signals at this and its harmonics. After trying various F.F.T. visualisations we did, exactly where predicted except for f 0 which, whilst strong, was masked by noise (note -log scale).
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