Speed\((v)\) is in metres per second \(m\,s^{-1}\), distance \((d)\) in metres \((m)\) and time\( (t)\) in seconds \((s)\). Measuring the time taken for a sound wave ...

Although the Mercalli scale does not use scientific equipment to measure seismic waves, it has been very useful for understanding ... so a building built on top of solid rock shouldn't be as damaged ...