Ключевые слова: activity, amplitude, analog, audio, black, chart, crash, curve, data, decibel, detector, diagram, disaster, earth, earthquake, electronic, equipment, frequency, geology, graph, impact, lie, line, measure, meter, motion, music, oscilloscope, peak, polygraph, pulse, quake, radio, record, richter, seismic, seismogram, seismograph, seismometer, sound, soundwave, symbol, test, vibration, warning, wave, waveform,