1888 |
Lick Observatory, Mount Hamilton, California
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120th Anniversary
In 1887 and 1888, the Ewing duplex-pendulum seismometer was
placed at ten sites in Northern California and Nevada.
The first seismographic observatories in the
Western Hemisphere, at Berkeley and Mount Hamilton (Lick Observatory), California,
were equipped with the duplex instruments as well as
Ewing horizontal-pendulum seismometers and Gray-Ewing vertical
seismometers.
The Lick Observatory, University of California, Mount Hamilton, California,
had its the formal opening
June 1, 1888 and exhibited the seismographs.
The first record reported was of a local earthquake on April 24, 1887.
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