The same way can develop legendary narrow circles, that would not be able create in vegetation even a child by walking through it. There was also in progress a shock wave in the air, initially much faster than sound speed, gradually slowing down.
Pia kulikuwa na maendeleo katika wimbi mshtuko katika hewa, awali kwa kasi zaidi kuliko kasi ya sauti, hatua kwa hatua kupunguza chini.