A deployable network of ground-mounted seismic sensors that detect and classify movement on and below the surface within a monitored area. Each sensor spike is driven into the ground and detects vibrations from footsteps, vehicles, tunneling activity, and structural settling. The network's AI classifies detected vibrations — distinguishing between a walking person, a running person, a vehicle, and mechanical digging — and provides the count, direction, and speed of detected movement. The system can detect a single person walking at up to 100 meters and a vehicle at up to 500 meters through ground vibration alone.