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Authors: Romeo, G. 
Title: Whale watching effects of strong signals on Lippmann style seismometer
Issue Date: 2012
Series/Report no.: /16(2012)
DOI: 10.1007/s10950-011-9246-7
Keywords: Feedback seismometer.
Lippmann method
Single-coil feedback
PSPICE simulation
Seismometer saturation
Subject Classification04. Solid Earth::04.06. Seismology::04.06.10. Instruments and techniques 
Abstract: In 1982 Erich Lippman patented a brilliant method to extend the frequency response of seismometers with an electromagnetic transducer. Adopted by Lennartz Electronic this single-coil velocity-feedback strategy appears in a large part of the German company production. In case of strong signals from near events, seismometers using the Lippman method may produce recordings with a characteristic ‘whale shape’. The article examines the PSPICE (Personal Simulation Program with Integrated Circuit Emphasis) model of an s13 seismometer treated with the Lippman method, as well as a prototype built in INGV, and shows the effect of strong signals on them.
Description: It’s a technical article that examines in deep a seismometer behavior even in case of strong excitation. The shown simplified model may be useful in seismometer understanding and design.
Appears in Collections:Papers Published / Papers in press

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