Anomalies sismiques au-dessus de cavités. (Seismic anomalies above underground cavities)
Seismic phenomena related to underground karstic voids were discovered by a high-energy source associated to an analogical-digital system. The seismic signals include diffraction, reflection, echo, and anomalies in the frequencies and amplitudes
Bibliography ; Europe ; Human impact ; Land use ; Model ; Sediment budget ; Seismicity ; Tectonics ; Topography ; Watershed
The AA. analyse the relation between sediment yield (SY) and seismic activity, a component of tectonic processes. Results show a spatial correlation between SY and seismic activity expressed as the estimated peak ground acceleration (PGA) with a 10
that this effect is significant both for small catchments in Europe and for large river systems worldwide and that seismic activity may be even more important for explaining regional variation in SY than land use or many other commonly considered factors (e.g
. catchment area, climate). It is shown that explicitly considering seismic activity may lead to SY-estimates that easily deviate a factor 2 or more compared to estimates that do not consider seismic activity.
The seismic data from 1999–2008 used in this study was acquired from a 5 station Digital Seismic Network in Kumaun Himalaya. The hypocentral parameters of the events used here indicate low stress drop values and shallow focal depth. The clusters
new faults are identified on the basis of geomorphological signatures. The morphotectonic development has been related to the prevalent seismicity of the region. It is evident that the major thrust and faults of the region are seismically as well
as neotectonically active in some segments. From the ongoing seismic and neotectonic movements it is clear that some of the faults and thrusts are active at present.
The seismic map of the territory east of the river Tisza is presented. An attempt is made to compare the earthquake data with faults traced by seismic surveys and geodetic and gravitational observations.
Digital earth, virtual reality and urban seismic disaster simulation
-USD (Computer Virtual Reality for Urban Seismic Disaster Simulation) system which aims to simulate and manage seismic disaster through integrating RS, GIS and VR technologies. They discuss the application of Virtual Reality in urban seismic disaster
Here two commercially-acquired seismic reflection profiles are used to establish the structure and stratigraphic relationships between the frontal part of the orogenic belt, the foredeep and foreland regions in the offshore continuation
of the Apennine system in the northern Ionian sea. Given the proximity of this study area, the tectono-stratigraphic relationships imaged on these seismic lines are likely to provide good analogues for Neogene basins and depositional systems for much
High-resolution seismic reflection evidence for middle Holocene environmental change, Owasco Lake, New York
Atmospheric circulation ; Climatic variation ; Geophysics ; Holocene ; Lacustrine sediment ; New York State ; Palaeo-environment ; Quaternary ; Seismic reflection ; United States of America
This paper presents new results and interpretations of a recent (1998) decimeter-resolution seismic reflection profile survey of Owasco Lake, one of New York's Finger Lakes. These new data allow for further refinement of the seismic stratigraphy
High-resolution seismic and ground penetrating radar - Geophysical profiling of a thermokarst lake in the western Lena Delta, northern Siberia
Asian part of Russia ; Delta ; Geophysics ; Lacustrine sediment ; Lake ; Periglacial features ; Permafrost ; Radar ; Seismic method ; Siberia ; Thermokarst
High-resolution seismic and ground-penetrating-radar (GPR) data have been acquired over Lake Nikolay in the western Lena Delta in order to study the uppermost basin fill and the bordering frozen margins. GPR measurements were completed on the frozen
lake and its permafrost margins, while high-resolution seismic data were acquired from the lake during open-water conditions in summer using a Chirp profiler. The combined use of the 2 profiling systems allows stratigraphic profiling in both frozen
The effects of earth tidal and seismic forces upon groundwater levels. A consideration to the radon problem
Water levels in wells can response to Earth tidal, seismic waves and atmospheric pressure variations. By applying models of these responses in the well of the Royal Observatory of Belgium and in five wells of the Mons Basin, hydrogeological
Depositional environments and history of Late Quaternary sediments in Hudson Strait and Ungava Bay : further evidence from seismic and biostratigraphic data
Late Quaternary seismic stratigraphy of the inner shelf seaward of the Tuktoyaktuk Peninsula, Canadian Beaufort Sea
The objectives of this paper are to present an interpretation of the late Quaternary seismic stratigraphy and sedimentary environments of the inner shelf of the eastern Beaufort Sea off Tuktoyaktuk Peninsula and to make some preliminary observations