Oceanic lithosphere provides an ideal location to decipher the nature of the lithosphere-asthenosphere system which is vital to our understanding of plate tectonics. It is well established that oceanic lithosphere cools, thickens, and subsides as it ages according to the conductive cooling models. Yet this simple realization fails to explain various observations. For example, old oceanic lithos...

S U M M A R Y We report on a strong scatterer of seismic energy in the 5–10 s period range located in the volcanic arc of Southern Peru. It is superficially like an active noise source in that it produces a continuous signal that arrives earlier than the inter-station surface wave in the noise crosscorrelations. However, it is clearly determined to be a scatterer based on the coda arrivals obse...

[1] Sp and Ps converted seismic waves at 93 permanent seismic stations are used to image upper mantle velocity discontinuities across the contiguous United States and portions of southeast Canada and northwest Mexico. Receiver functions are calculated with frequency‐ domain deconvolution and migrated with 1D models that account for variations in crustal structure and mantle velocities between s...

The observed solar p-mode velocity power spectra are compared with theoretically calculated power spectra over a range of mode degree and frequency. The shape of the theoretical power spectra depends on the depth of acoustic sources responsible for the excitation of p-modes, and also on the multipole nature of the source. We vary the source depth to obtain the best fit to the observed spectra. ...

background: short golden time is important to save the injured in earthquake and to start search and rescue (sar) operation as soon as possible in affected regions. this study evaluated application of geographic information system (gis) for sar operation in rigan town, kerman province, which was hit by an earthquake of 6.3 richter scale on december 12, 2010 at 22:12. materials and methods: a gi...

Abstract. Volgo–Uralia is a Neoarchaean easternmost part of the East European craton. Recent seismic studies Volgo–Uralian region provided new insights into crustal structure this area. In study, we combine satellite gravity and data in common workflow to perform complex study structure, which useful for further basin analysis light, model subcraton presented from step-wise approach: (1) invers...

The observed solar p-mode velocity power spectra are compared with theoretically calculated power spectra over a range of mode degree and frequency. The shape of the theoretical power spectra depends on the depth of acoustic sources responsible for the excitation of p-modes, and also on the multipole nature of the source. We vary the source depth to obtain the best fit to the observed spectra. ...

This survey aimed to evaluate the level of lead (Pb) pollution in cattle in the vicinity of the Shiraz oil and petrochemical industries using hair samples. Dairy farms located within 10 km of the Shiraz oil and petrochemical industries were identified and divided into four groups. Farms that were located in the radial zones of 0.5-1.5 km, 1.5-5 km, 5-7 km, 7-10.5 km were considered as groups A,...

SUMMARY This Ph.D. thesis focuses on construction and analysis of a comprehensive model of the European lithosphere, which is based on the integration of most of the existing geophysical studies and estimation of physical (density, temperature, velocity) and rheological parameters. The model describes the structure and physical properties of the principal lithospheric layers, drawing special at...