It seems the Covid19 pandemic (more specifically the resulting lock down in this case) is causing some surprising occurrences! via Unexplained-Mysteries: Scientists have revealed that the coronavirus lockdown has reduced the level of vibrations in the Earth's crust. With most people being forced to remain indoors due to the ongoing pandemic, things are certainly quieter these days. Recent reports have revealed that the reduction in activity has resulted in a marked reduction in pollution levels over many of the world's biggest cities and now it appears as though the Earth's crust itself may also be experiencing a level of quiet on a scale that is typically only seen on Christmas Day. Normally, the vibrations produced by cars, factories, construction works and humans simply going about their daily business cause the planet's outer layer to vibrate or 'hum'. Now however, seismologists at the Royal Observatory in Belgium have reported a significant reduction in vibration levels of up to