Anonymous ID: 84dd5c Dec. 14, 2018, 3:05 p.m. No.4313499   🗄️.is 🔗kun

>>4312949

>THATS ABOVE GROUND

Sonic booms and thunder register this way. In fact, the existence of several top secret experimental aircraft was first documented by seismographic evidence. The SR-71, Aurora, and others were discovered this way.