A seismometer (the term seismograph may be used to describe a
seismometer combined with an instrument for recording and
displaying the amplitude and frequency of the seismic waves that
the seismometer measures). Please see the related link.
View page
The seismometer measures how bad and earthquake is and a Richter
Scale measures hoe bad a hurricane is.
View page
The seismometer is the 'odd one out'. The other instruments
measure factors to do with weather (wind speed, air pressure &
temperature) - the seismometer measures movements in the Earth's
crust.