> If you wander up to a seismograph in a museum, unless you are lucky enough to be there right during an earthquake, all you will see is a small wiggly signal b

> If you wander up to a seismograph in a museum, unless you are lucky enough to be there right during an earthquake, all you will see is a small wiggly signal being recorded. If you walk up to one and jump nearby, you'll see a fairly significant signal being recorded. They're particularly sensitive, I've seen them picking up trucks driving a km or so away. They do know how to ignore this though. For a nice country-wide seismograph display, there is: https://www.geonet.org.nz/earthquake/drums https://www.geonet.org.nz/earthquake/drums though (fortunately) it's looking a bit boring right now.