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PROVISIONAL DATA SUBJECT TO REVISION

Selected Sites Period of Record
10010000
1847-10-18  2019-01-20
10010100
1966-04-15  2019-01-20

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Tip: To reset zoom period to period selected, double left-click in the "Period selected" plot.
Tip: To zoom to a shorter period, left-click and drag over the period of interest in either graph.