I could speculate that an array of seismic or comparable detectors would be able to pick up direction and with filtering and processing, identify the type of so

I could speculate that an array of seismic or comparable detectors would be able to pick up direction and with filtering and processing, identify the type of source. Somewhat relevant link: https://www.newscientist.com/article/dn28700-earthquake-detectors-pick-up-wartime-explosions-and-helicopters/ https://www.newscientist.com/article/dn28700-earthquake-dete...