The magnitude of an earthquake is measured by :
Tiltmeter
Richter scale
Seismograph
Seismometer
Answer is Wrong!
Answer is Right!
This question was previously asked in
UPSC CISF-AC-EXE – 2023
– **Seismograph (C) / Seismometer (D):** These are instruments used to detect and record the ground motion caused by seismic waves from an earthquake. The data recorded by a seismograph is used to calculate the magnitude and locate the earthquake, but the instrument itself measures motion, not magnitude directly.
– **Tiltmeter (A):** An instrument used to measure very small changes in the inclination of the ground surface, often used to monitor volcanic activity or ground deformation.