Here some reports: “Yep. Definitely heard it. Woke first at 2am, 2nd not long after. Was a strange rumbling noise with shaking windows. Cat went crazy. Never heard anything like it before. Freaked me out!!!” “Woken up by the windows rattling, and then a low frequency rumble-not much noise. (Colonel Light Gardens). Different to usual thunder.” “Windows rattled and thought some one was breaking in.” What were these strange shaking and loud noises that woke up residents of Adelaide, South Australia between 2am and 2.30am on Saturday, September 2, 2017? At least 800 people reported the event to Geoscience Australia. Witnesses felt at least two minor shakes and heard rumbles that woke them up. Geoscience Australia first reported a M1.4 magnitude quake around Mount Compass, which was then removed from the website, since further investigations shown that thunder was the culprit… Really, thunder creating a M1.4 earthquake? Some meteorologists argue it may have been a storm and that the very large temperature inversion present at the time of the event in the atmosphere refracted back the sound waves towards the ground amplifying the sound of thunder. A seismologist at the Seismological Association of Australia said the tremors remained a mystery under investigation: “I can confirm that is definitely not an earthquake; exactly what it is, I don’t know but we have recorded it on quite a lot of our instruments between Hamley Bridge and the Hindmarsh Valley, so over the whole of Adelaide.” Hey guys! You remerber Chelyabinsk? This is probable another large meteor exploding in the sky over Adelaide, like that across western Canada on September 4, 2017!
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