Ключевые слова: activity, amplitude, analog, audio, beat, blue, chart, data, decibel, detector, diagram, different, disaster, earth, earthquake, electronic, frequency, geology, graph, ground, illustration, impact, instrument, lie, line, measure, meter, motion, music, oscilloscope, paper, pulse, quake, record, red, richter, seismic, seismogram, seismograph, seismology, seismometer, sound, test, vibration, voice, volcano, wave, waveform, wavelength,