Please use this identifier to cite or link to this item:
http://hdl.handle.net/2122/2129
DC Field | Value | Language |
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dc.contributor.authorall | Panepinto, S.; Royal Observatory of Belgium, Brussels, Belgium | en |
dc.contributor.authorall | Greco, F.; Istituto Nazionale di Geofisica e Vulcanologia, Sezione Catania, Catania, Italia | en |
dc.contributor.authorall | Luzio, D.; Dipartimento di chimica e Fisica della Terra, University of Palermo, Italy | en |
dc.contributor.authorall | Ducarme, B.; Royal Observatory of Belgium, Brussels, Belgium | en |
dc.date.accessioned | 2007-06-11T07:50:05Z | en |
dc.date.available | 2007-06-11T07:50:05Z | en |
dc.date.issued | 2006 | en |
dc.identifier.uri | http://hdl.handle.net/2122/2129 | en |
dc.description.abstract | Continuous gravity recordings in volcanic area could play a fundamental role in the monitoring of active volcanoes and in the prediction of eruptive events too. This geophysical methodology is utilized, on active volcanoes, in order to detect mass changes linked to magma transfer processes and, thus, to recognize forerunners to paroxysmal volcanic events. Spring gravimeters are still the most utilized instruments for microgravity studies because of their relatively low cost and small size, which make them easy to transport and install. Continuous gravity measurements are now increasingly performed at sites very close to active craters, where there is the greatest opportunity to detect significant gravity changes due to a volcanic activity. Unfortunately, spring gravity meters show a strong influence of meteorological parameters (i.e. pressure, temperature and humidity), especially in the adverse environmental conditions usually encountered at such places. As the gravity changes due to the volcanic activity are very small compared to other geophysical or instrumental effects we need a new mathematical tool to get reliable gravity residuals susceptible to reflect the volcanic effect. In the following we present and discuss a preliminary work about the confrontation between the traditional filtering methodology and the Wavelet transform. The overall results show that the performance of the wavelet-based filter seems better than the Fourier one. Moreover, the possibility of getting a multi-resolution analysis and study local features of the signal in the time domain makes the proposed methodology a valuable tool for gravity data processing. | en |
dc.format.extent | 363931 bytes | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | English | en |
dc.subject | Gravimeter | en |
dc.subject | wavelet transform | en |
dc.subject | filtering | en |
dc.subject | volcanic monitoring | en |
dc.title | An overview on wavelet multi-resolution decomposition compared with traditional frequency domain filtering for continuous gravity data denoising | en |
dc.type | manuscript | en |
dc.description.status | Submitted | en |
dc.subject.INGV | 04. Solid Earth::04.03. Geodesy::04.03.05. Gravity variations | en |
dc.subject.INGV | 05. General::05.01. Computational geophysics::05.01.01. Data processing | en |
dc.relation.references | Budetta G., Carbone D., Greco F. and Hazel R., 2004. Microgravità Studies at Mount Etna (Italy). American Geophysical Union-Geophysical Monograph Series 143: 221-240. Carbone D., Budetta G. and Greco F., 2003a. Possible mechanisms of magma redistribution under Mt. Etna during 1994-1999 period detected through microgravity measurements. Geophys. J. Int., 153: 187-200 Carbone D., Budetta G., Greco F. and Rymer H., 2003b. Combined discrete and continuous gravity observations at Mt. Etna. J. Volcanol. Geotherm. Res., 123:123-135 Carrozzo M.T., R. de Franco, L. De Luca, D. Luzio, R. Primiceri, T. Quarta and M. Vitale. Wavelet correlation filter for wide-angle seismic data. Geophysical Prospecting, 2002, 50, 547-564 Coifman R.R. and Wickerhauser M.V. 1993. Wavelets and adapted waveform analysis. A toolkit for signal processing and numerical analys is. Proceedings of Symposia in Applied Mathematics 47, 119-145. Daubechies I. 1992. Ten Lectures on Wavelets. Society for Industrial and Applied Mathematics. Deighan A.J. and Watts D.R. 1997. Ground roll suppression using the wavelet ttansform. Geophysic s 62, 1896-1903. El Wahabi A., Ducarme B., Van Ruymbeke M., d’Oreyè N. and Somerhausen A., 1997. Continuous gravity observations at Mt. Etna (Sicily) and Correlations between temperature and gravimetric records. Cahiers du Centre Européen de Géodynamique et de Séismologie, 14: 105-119. Fedi M. and Quatta T. 1998. Wavelet analysis for the regional residual and local separation of the potential field anomalies. Geophysical Prospecting 46, 507-525. Foufoula -Georgiou E. and Kumar P. 1994. Wavelets in Geophysics. Academic Press, Inc. Grubb H.]. and Walden A.T. 1997. Characterizing seismic time series using the discrete wavelet transform. Geophysical Prospecting 45, 183-205. Mallat S. 1992. Multiresolution approximation and wavelets. Transactions of the Americ an Mathematical Society 315, 69-88. Mallat S. 1999. A Wavelet Tour of Signal Processing. Academic Press, Inc. Meyer Y. 1993. Wavelets Algorithms mid Applications. Society for Industrial and Applied Mathematics. Percival D. B. and Walden A. T. 2002. Wavelet methods for time series analysis. Cambridge University Press Warburton R. J. and Goodkind J. M., 1997. The influence of barometric -pressure variations on gravity. Geophys. J. R. Astron. Soc., 48: 281-292. | en |
dc.description.fulltext | open | en |
dc.contributor.author | Panepinto, S. | en |
dc.contributor.author | Greco, F. | en |
dc.contributor.author | Luzio, D. | en |
dc.contributor.author | Ducarme, B. | en |
dc.contributor.department | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | en |
dc.contributor.department | Dipartimento di chimica e Fisica della Terra, University of Palermo, Italy | en |
dc.contributor.department | Royal Observatory of Belgium, Brussels, Belgium | en |
item.openairetype | manuscript | - |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione OE, Catania, Italia | - |
crisitem.author.dept | Università degli Studi di Palermo, CFTA, Palermo | - |
crisitem.author.dept | Royal Observatory of Belgium, Brussels, Belgium | - |
crisitem.author.orcid | 0000-0002-0265-5073 | - |
crisitem.author.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
crisitem.classification.parent | 04. Solid Earth | - |
crisitem.classification.parent | 05. General | - |
crisitem.department.parentorg | Istituto Nazionale di Geofisica e Vulcanologia | - |
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