Accelerograph 2
Accelerograph 2 : Natural Disaster. A compact, rugged, and relatively inexpensive seismograph designed to record the signal from an accelerometer, especially of strong ground shaking on ground or in structures, caused by nearby large earthquakes (see, e.g., Trifunac, 2008). Film used to be the most common analog recording medium. Modern accelerographs, however, record digitally with much larger dynamic range. Whereas a traditional strong-motion accelerograph begins recording when the motion exceeds a certain specified trigger level, at present, some seismic networks record acceleration within a large dynamic range continuously
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