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Time marks and clock corrections; a century of seismological timekeeping

Duncan Carr Agnew
Time marks and clock corrections; a century of seismological timekeeping
Seismological Research Letters (May 2020) 91 (3): 1417-1429

Abstract

Accurate time measurement is a crucial element of seismic data collection. For data collected before the 1980s and especially before 1960, the technologies involved are no longer familiar to most researchers. I outline how reliable time has been obtained for seismology and describe the histories of master clocks, local clocks, time transfer, time comparison, and uniform motion for visual recording. A compendium of station data for 1921 gives a snapshot of early seismological timekeeping. I present an overview of subsequent developments, with suggestions on how to weight observed times using descriptions of the timing system used.


ISSN: 0895-0695
EISSN: 1938-2057
Serial Title: Seismological Research Letters
Serial Volume: 91
Serial Issue: 3
Title: Time marks and clock corrections; a century of seismological timekeeping
Author(s): Agnew, Duncan Carr
Affiliation: Scripps Institution of Oceanography, San Diego, CA, United States
Pages: 1417-1429
Published: 202005
Text Language: English
Publisher: Seismological Society of America, El Cerrito, CA, United States
References: 81
Accession Number: 2020-070543
Categories: Seismology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute. Abstract, Copyright, Seismological Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 202020
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