seismogram of different seismic activity record , earthquake wave on paper fixing, stereo audio wave diagram ba

activity amplitude analog audio background black chart curve data detector diagram different disaster display earthquake electronic erupt eruption fixing fracture frequency geology graph illustration impact instrument line measure meter monitor motion nature paper pulse quake radio record richter science seismic seismogram seismograph seismology seismometer sign sound stereo technology tectonics tremors vector vibration volcanic volcano wave waveform