Trivia: What tool measures the intensity of an earthquake?
Correct Answer: Seismograph
So why is this answer correct? : Seismographs are the instruments responsible for recording the intensity of earthquakes. Around the world, seismographs are installed directly in the ground and are used to both measure and record seismic activity as it occurs. Measurements are made by a seismometer, an internal pendulum that swings back and forth when the ground moves. Thanks to the seismographic network, scientists are able to measure the shockwaves around the world and prepare for future disturbances.