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Methods for Laboratory Seismometer Calibration Traceable to the Si – a Current Overview of Challenges and Solutions

Description: 

Over the past 5 to 10 years the topic of traceable calibration of broadband seismometers gained more and more attention from the vibration metrologists from various national metrology institutes (NMI). As a consequence an increasing global effort could be seen in the development of calibration methods and and calibration chains with the goal to link seismic measurements to the international system of units. PTB, the German NMI was among the active protagonists of this development taking the lead in regional research projects and setting up several adapted national standards in its own laboratories.

This contribution will give an overview of the current state of the art in laser-interferometric and tilt-based primary calibration as well as in seconadry calibration of broadband seismometers as far as measurements in the laboratry are concerned. we will explain the challenges and experimental efforts and summarize the final steps needed to establish a complete traceability chain for seimological measurements.

Session: Fifty Years and Beyond of Broadband Seismic Instrumentation: Performance, Precision and Uncertainties - I

Type: Oral

Date: 4/16/2025

Presentation Time: 04:45 PM (local time)

Presenting Author: Thomas

Student Presenter: No

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