Which of the following instruments is used to measure earthquake magnitude?

A ) Lactometer

B ) Anemometer

C ) Seismograph ✅

D ) Pyrometer


Explanation:

✅ The Seismograph, also known as a Seismometer, is a scientific instrument used to detect, record, and measure the vibrations and magnitude of earthquakes occurring beneath the Earth's surface.

Unique Key Points for Exams:

  •  ✅  Name of Instrument: Seismograph (also called Seismometer)
  •  ✅  Purpose: Detects and records seismic waves caused by earthquakes or ground motion
  •   ✅ Output: Produces a reading called a Seismogram
  •   ✅ Measured In: Magnitude (Richter Scale / Moment Magnitude Scale) and Intensity (Mercalli Scale)
  •  ✅  Developed By: Early versions by John Milne (British seismologist) in the 1880s

 Tip to Remember:

"Seismo" = Earthquake
"Graph" = Recording
✅ So, Seismograph = Earthquake Recorder

 ✅ A Seismograph is the instrument used to measure and record the strength and vibrations of earthquakes.