Napoli(Mandraccio) 250/051 RLR(1921) is 9.5m below BM
Documentation added 1992-08-06
Italian levels may be influenced by the Messina earthquake 1908 - see Bottari et al. Tectonophysics 202, 269-275, 1992
Documentation added 1993-03-17
The stations Porto Maurizio (250/001), Napoli Arsenale (250/041) and Napoli Mandraccio (250/051) appear to each have a datum shift around 1910. Evidence for regional coherence?
Documentation added 1998-12-07
For a discussion of land movements in the area of the Gulf of Naples,see the paper by G.Berrino in Tectonophysics,294,323-332,1998.
Documentation added 2019-06-04
Following an email from Marco Olivieri from the National Institute of Geophysics and Vocanology (INGV) Italy this station name has been edited. He also confirmed that the tide gauge was sited in the vicinity of the Church Santa Maria di Porto Salvo in Naples. He suggested co-ordinates 40.8429 14.2575 for the gauge as the previous values were ~2.5km from the coast.
Istituto Idrografico della Marina Passo Osservatorio 4 16134 Genova