question: What is used to measure the strength of shaking?
choices.text: vibration melanin amount sound vibrations Plate tectonics seismometer thermometer barometer rain gauge
choices.label: A B C D E F G H
fact2: Scientists use seismometers to determine the location and strength of earthquakes.
combinedfact: a seismometer is used to measure strength
formatted_question: What is used to measure the strength of shaking? (A) vibration (B) melanin amount (C) sound vibrations (D) Plate tectonics (E) seismometer (F) thermometer (G) barometer (H) rain gauge