Ключевые слова: abstract, activity, amplitude, analog, audio, background, chart, curve, decibel, diagram, digital, disaster, display, earthquake, electronic, frequency, graph, grid, illustration, increase, meter, monitor, motion, oscilloscope, paper, pulse, quake, rate, rhythm, richter, scale, seismic, seismogram, seismograph, seismometer, sound, technology, test, vibration, wave, waveform, waves,