Tunguska's Pressure Wave Circled the Earth Twice

A pressure wave from the Tunguska airburst traveled around the entire planet twice. Newly installed barographs in the British Isles picked up the pulse on the morning of June 30th, 1908, and by measuring its velocity, researchers were able to trace it back in time to the exact moment of the explosion. This is the kind of physical evidence that turns an anecdote into a documented event. The atmospheric disturbance wasn't localized. It was global. The shockwave rippled outward from central Siberia, crossed continents and oceans, and returned on itself, recorded by instruments thousands of miles away. That's the power of an airburst at scale, and it's a reminder that these events leave fingerprints across the entire system, not just at ground zero.