Never have I... used a vibrator to attempt to detect seismic activity.
“I’ve used a vibrator to create seismic activity before if you catch my drift, but I don’t think I could ever use it to detect it. Ideally, you want the opposite of a vibrator for that: something that’s static in relation to the tectonic base. I use a hanging needle-pointed stone in a glass case filled partially with sand. The stone acts as a pendulum that sways when the planet moves. Abnormal swaying is caused by tectonic activity. Through a small mesh of electrified copper wires and a conductive stone it becomes an alert. Of course, by then you’d already feel it too. The Tol’vir came up with it, don’t look at me.”