Geofisica pura e applicata

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Proposte per lo sviluppo della rete meteorologica nelle Alpi Occidentali
Geofisica pura e applicata - Tập 17 - Trang 234-237 - 1950
Manfredo Vanni
The writer wants to emphasize the necessity of reorganizing rationally the system of the meteorologic observatories in the Western Alps, especially of the ones on the highest mountains which are the most important for the study of the variations of glaciers. For that reorganization it is necessary to remember the variety of the climatic regions into which the Western Alps may be divided. The write...... hiện toàn bộ
Microseismic Event Detection Kalman Filter: Derivation of the Noise Covariance Matrix and Automated First Break Determination for Accurate Source Location Estimation
Geofisica pura e applicata - - 2004
Erick Baziw, Bohdan Nedilko, Iain Weir-Jones
Seismic Ground Motion in Napoli for the 1980 Irpinia Earthquake
Geofisica pura e applicata - Tập 161 - Trang 1239-1264 - 2004
C. Nunziata
— The seismic ground motion in the urban area of Napoli has been computed for the 1980 earthquake (M s = 6.9) with a hybrid technique based on the mode summation and the finite difference methods. The detailed geological setting of each quarter has been reconstructed from several stratigraphies and six geological zones have been recogniz...... hiện toàn bộ
La réflectivité d'un sédiment marin poreux
Geofisica pura e applicata - Tập 105 - Trang 713-728 - 1973
Jean-Pierre Mizikos
Les formules établies pour les liquides ou les solides sont pratiquement applicables aux sédiments poreux saturés non-consolidés, contrairement aux grés. L'étude présentée permet de comprendre la nature de l'onde longitudinaleP2 et du couplage dynamique. Elle illustre l'extension du principe de Huyghens aux mileux poreux.
The concentration of molecular H2 and CH4 in the stratosphere
Geofisica pura e applicata - Tập 106 - Trang 1352-1360 - 1973
D. H. Ehhalt, L. E. Heidt
Stratospheric profiles of CH4 and H2 over eastern Texas have been derived up to 31 km altitude from air samples collected aboard a balloon and analyzed by gas chromatography. For H2, contamination during flight and measurement presented a problem which has been resolved only recently. The earlier profiles require corrections which are rather large for the highest altitudes. The three profiles indi...... hiện toàn bộ
Reflection and Transmission of P-Waves in an Intermediate Layer Lying Between Two Semi-infinite Media
Geofisica pura e applicata - Tập 175 - Trang 4305-4319 - 2018
Pooja Singh, Amares Chattopadhyay, Akanksha Srivastava, Abhishek Kumar Singh
With a motivation to gain physical insight of reflection as well as transmission phenomena in frozen (river/ocean) situation for example in Antarctica and other coldest place on Earth, the present article undertakes the analysis of reflection and transmission of a plane wave at the interfaces of layered structured comprised of a water layer of finite thickness sandwiched between an upper half-spac...... hiện toàn bộ
Näherungsformeln für die bei der Reflexion und Brechung elastischer Wellen an Unstetigkeitsflächen auftretenden Reflexions-und Transmissionskoeffizienten
Geofisica pura e applicata - Tập 37 - Trang 1-15 - 1957
E. Hardtwig
Beim Auftreffen einer Verdichtungswelle auf die Trennungsfläche zweier elastischer Medien entstehen bekanntlich vier Sekundärwellen, nämlich je eine gebrochene und reflektierte Verdichtungs- und Scherungswelle. Die Amplituden dieser Sekundärwellen und damit auch die auf sie entfallenden Energieanteile der Primärwelle hängen — ausser von den physikalischen Konstanten der Medien — vom Einfallswinkel...... hiện toàn bộ
Seismic and Aseismic Slips Induced by Large-scale Fluid Injections
Geofisica pura e applicata - Tập 150 - Trang 563-583 - 1997
F. H Cornet, J. Helm, H. Poitrenaud, A. Etchecopar
—A 3600 m deep well has been used to conduct large water injection tests in the Rhine Graben. The total volume injected during the fall 1993 reconnaissance program reached 44000 m3. Induced seismicity was monitored with both a downhole and a surface seismic network. About 20000 events have been recorded by the downhole tools and 165 events with the surface network. The largest observed magnitude r...... hiện toàn bộ
Fresnel zone inversion for lateral heterogeneities in the earth
Geofisica pura e applicata - - 1992
Kiyoshi Yomogida
We propose a different kind of seismic inversion from travel-time or waveform inversion for lateral heterogeneities in the earth: Fresnel zone inversion. Amplitude and phase delay of data in several frequency ranges are inverted for model space around ray paths with a width corresponding to the considered frequency so that primary effect of finiteness of wavelength be included. For vertically hete...... hiện toàn bộ
Libri nuovi
Geofisica pura e applicata - Tập 2 - Trang 224-229 - 1940
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