The Harvard‐Adam Dziewoński observatory is one of the oldest seismic stations academically established in the United States, and it is owned and maintained by Harvard University (Leet, 1934). It is currently one of the Global Seismic Network stations operated by the U.S. Geological Survey (USGS)’s Albuquerque Seismological Laboratory (network code IU) and is also used as a testing facility for new instruments by Quanterra, Inc. The digital data from the Harvard seismic station since 1988 are readily available to the scientific community through the Incorporated Research Institutions for Seismology Data Management Center and are widely used for various...

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