GNGTS 2014 - Atti del 33° Convegno Nazionale

component, although the magnitudes of the effects of lateral heterogeneities should be similar for both O 1 and M 2 waves (Baker and Bos, 2003). We recall here, for comparison, the values of the tidal residual vectors resulting from the analysis of 5 years of gravity records obtained at the station of Naples (Campania region, southern Italy). Campania, located on the eastern margin of the middle-southern Tyrrhenian basin of the Mediterranean Sea, is a site characterized by intense explosive volcanism and seismic activity. The results of the analyses indicate that both components of X vectors are basically negligible at that station; this indicates that no significant tidal anomaly is affecting that area despite the presence of active volcanoes and seismic sources (Albano and Corrado, 2013). The afore mentioned results are consistent with the conclusion of the researchers who promote the idea that the uncertainties of the tidal observations mask some possible relationships between lateral heterogeneities of the lithosphere and their very small effects on the tidal field (e.g. Fernandez et al. , 2008). Therefore, for the time being, the empirical correlations found by other authors, although statistically significant, do not allow a reliable geological interpretation. Beyond everything, the obtained results of the analyses of gravity records have provided models for the gravity tide and tidal field in the Calabrian region. Moreover, it turns out that the response of the complex lithospheric structure in the Calabrian Arc system to the tidal stress field seems not produce any significant anomaly related to the adopted model. References Albano A. and Corrado G.; 2013: Five years of continuous gravity observations in the Neapolitan Volcanic Area - Boll. Geof. Teor. Appl., 54 , 1, 1-21. Albano A., Corrado G., Gervasi A. and Guerra I.; 2014: C ontinuous gravity and tilt observations in an active geodynamic area of Southern Italy: the Calabria Arc System – submitted to Boll. Geofis. Teor. Appl. Antonioli A., Ferranti L., Lambeck K., Kershaw S., Verrubbi V. and Dai Pra G.; 2006: Late Pleistocene to Holocene record of changing uplift rates in southern Calabria and northeastern Sicily (southern Italy, Central Mediterranean Sea) – Tectonophys., 422, pp. 23-40. Baker T. F. and Bos M. S.; 2003: Validating Earth and ocean models using tidal gravity measurements - Geophys. J. Intern., 152 , 468-485. Biolcati E., Origlia O., Germak A., Mazzoleni F. and Vitiello F.: 2013: Absolute measurements of the free-fall acceleration in Arcavacata (CS), Italy - Technical Report RT-29/2013, Ist. ���� ���� ������� ������ ������ Naz. Ric. Metrol. INRiM, Turin. Bonvalot S., Diament M. and Gabalda G.; 1998: Continuous gravity recording with Scintrex CG-3M meters: a promisi�� ���� ��� ���������� ������ ����� ng tool for monitoring active zones - Geophys. �� ����� J. Int., 135 , 470-498. Cerutti G. and De Maria P., 1994 - Misure assolute dell’accelerazione di gravità a Cosenza, Ischia, Ercolano – Ist. Metrologic� �� ����������� ������� ����� ���� ���� � ���� o G. Colonnetti, Torino, Rapp. Tec. Int. R 385, Dehant V.; 1989: Report of the Working Group on Theoretical Tidal Model. Proc. 11 th Int. Symp. Earth Tides, Helsinki, Schweitzerbartsche Verlagsbuchhandlung, Stuttgart, 533-548. Dehant V., Defraigne P. and Wahr J.M.; 1999: Tides for a convective Earth . �� �������� ����� J. Geophys. Res., 104 , B1. D’Agostino N., D’Anastasio E., Gervasi A., Guerra I., Nedimovic M., Seeber L. ���and Steckler M. S.: 2011: Forearc extension and slow rollback of the Calabrian Arc – Geophys. ���� ����� ��� ������ ��� ���� Res. Let., 38, L1730, pp. 1-6. Fernandez J., Fernandez M., Miguelsanz L. and Camacho A.; 2008: On the interpretation of gravity tide residuals in the Iberian Peninsula . J. Geodynam., 45 , 18-31. Hartmann T. and Wenzel H.-G.; 1995: The HW95 Tidal Potential Catalogue . Geophys. Res. Lett., 22 , 3353 � ����� - 3556. Jentzsch G.; 1997: Earth tides and ocean tidal loading, in Tidal Phenomena . In: Wilhelm, Zurn, Wenzel (ed). Lecture Notes in Earth Sciences, Springer-Verlag, Berlin und Heidelberg, pp. 145- 171. Marino D., Bartoli D., Corrado M., Liperoti D. and Murphy D.; 2010: Prospezioni archeologiche subacquee a Crotone. Prima campagna 2009 tra le località Porto Vecchio e Tonnara . J. of Fasti on Line, Ass. ������� �������� Intern. Archeol. Class., www.fastionline.org/docs/FOLDER-it-2010-192.pdf . Melchior P.; 1995: A continuing discussion about the correlation of tidal gravity anomalies and heat flow densities. Phys. Earth Planet. Int., 88 , 223-256. Melchior P. and Francis O.; 1986: Comparison of recent ocean tide models using ground-based tidal gravity measurements. Mar. Geod., 19 , 291-330. Merriam J.B.; 1992: Atmospheric pressure and gravity . �������� �� ����� Geophys. J. Int., 109 , 488-500. Minelli L., Billi A., Faccenna C., Gervasi A., Guerra I., Orecchio B. ��� �������� ��� ������ and Speranza G.; 2013.: Discovery of a gliding salt-detached megaslide, Calabria – Geophys. Res. Let., 40, pp. 1-5. GNGTS 2014 S essione 1.2 127