- A tracing or chart showing the phenomena attendant on thunderstorms.
- a guitar for making such tracings, as a recording brontometer.
- identical to brontometer.
- An apparatus developed by Marvin (1899) for tracking any trend of noise, as thunder and/or release of a cannon.
- A map or diagram showing the progress of the front of a thunder-storm through isobronts or comparable lines for consecutive hours.