That's almost suspiciously similar to the Tunguska event, [1] a 3-30 megaton event from 1908, which flattened a large area of Siberian forest. Airburst meteorit

That's almost suspiciously similar to the Tunguska event, [1] a 3-30 megaton event from 1908, which flattened a large area of Siberian forest. Airburst meteorites hit fairly frequently in our solar system. I don't even know if you could detect a difference between an extrasolar high-velocity (60,000 km/s) low-mass (10^-2 kg) airburst and an interplanetary 'low'-velocity (27 km/s) high-mass (10^+9 kg) airburst. Importantly, these events are purely thermal, not nuclear, so there would be no radioactive fallout. [1] https://en.wikipedia.org/wiki/Tunguska_event https://en.wikipedia.org/wiki/Tunguska_event