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An intervalometer is usually a handheld device with a long cord that plugs into a cameraâs auxiliary port. It looks and works very similar to a remote trigger release. The type of intervalometer youâll need depends on your type of camera.
A seismometer is the scientific instrument used to detect earthquakes. Signals received from seismometers are recorded and this allows scientists to calculate the size (amount of energy released) of an earthquake, that is, its magnitude.