Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 33 for “"earthquake source"”.
-
The role of roughness in earthquake source physics
… this effect numerically at the scale of small earthquakes, in which realistic geometry and friction law parameters can be incorporated in the model. The numerical approach developed in this thesis includes three main features. First, to enable slip that is large relative to the size of the …
-
A numerical study of rupture propagation and earthquake source mechanism.
Thesis. 1976. Sc.D.--Massachusetts Institute of Technology. Dept. of Earth and Planetary Sciences.
-
Determination of earthquake source parameters from inversion of body waves
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
-
Determination and interpretation of earthquake source locations in Sichuan Province, China
This thesis involves locating and interpreting earthquakes from the Sichuan Province, China. The main contributions of this research are: successfully fitting the travel time data of three explosions to a two-layer crust model; and the improvement in locating earthquakes. To achieve these …
-
Earthquake source parameters, seismicity, and tectonics of the oceanographer transform fault
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Science, 1982.
-
Earthquake source parameters, seismicity, and tectonics of North Atlantic transform faults
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1983.
-
Retrieval of earthquake source parameters in inhomogeneous anisotropic mediawith application to swarm events in West Bohemia in 2000
Earthquakes form by sudden brittle failure of rock mostly as shear ruptures along a rupture plane. Beside this, mechanisms other than pure shearing have been observed for some earthquakes mainly in volcanic areas. Possible explanations include complex rupture geometries and tensile earthquakes. …
-
Global investigation of large earthquakes using long-period seismic data
Robust earthquake source models provide key information for a wide range of applications in Earth Sciences, such as in global tectonics, natural hazards and tomographic studies. In this thesis, we study large magnitude earthquakes using the Earth’s normal modes, which are standing waves resulting …
-
Active tectonics and earthquake hazards in continental mountain ranges and foreland basins
… active mountain belts are exposed to significant earthquake hazard, since the range-bounding faults produce large earthquakes, and the underlying geological structure amplifies the resulting ground shaking. The aim of this dissertation is to investigate the regional-scale controls on earthquake …
-
Reduced basis method for 2nd order wave equation : application to one-dimensional seismic problem
… the system parameters ,u, which consist of the earthquake source x8 and the occurring time T. The reduced basis method, the offline-online computational procedures and the associated a posteriori error estimation are developed. We have shown that the reduced basis pressure distribution is an …
-
Modeling dynamic ruptures with high resolution fault zone physics
Earthquakes are among the costliest natural hazards on earth. The dynamical instabilities responsible for the onset and propagation of these events are linked to fundamental physics, friction, fracture, heating, and compaction of fluid filled granular materials and rocks in the subsurface subjected …
-
Earthquake nucleation and rupture at a range of scales : laboratories, gold mines, and subduction zones
… magnitudes M [approx.] -2 to 8 in order to study earthquake source processes. In addition, we conducted laboratory experiments to study interseismic behaviors that can influence earthquake nucleation and we developed a model of eathquake rupture to explain the scaling behaviors we observe. To …
-
Seismic attenuation of regional phases in the northern Middle East and the Tibetan Plateau
… other methods by eliminating the influence of earthquake source, instrument response, and site responses. I have measured regional phase Q values for two continental-continental collision zones, the northern Middle East and the Tibetan Plateau. The regional phase Q is typically assumed as the …
-
Global investigation of large earthquakes using InSAR and long-period seismic data
… comprehensive global archive of InSAR-determined source models (ICMT database) compiled from the literature, which I use to independently assess source parameters reported in global and regional seismic catalogues. In general there is good agreement between InSAR and seismic source models, but …
-
The 2014-15 Bárðarbunga-Holuhraun magmatic rifting episode: A seismic study
On 16 August 2014 an unusual sequence of earthquakes began near the southeastern rim of the ice-covered Bárðarbunga caldera in central Iceland. Over the course of two weeks a dyke propagated 48 km beneath the glacier northeastwards and into the Holuhraun lava field, where it erupted for six months, …
-
Analyzing the Collective Behavior of Earthquakes to Understand Fault Mechanisms Better
… there is a tenfold increase in the number of earthquakes of magnitude 𝑚 > 𝑀 when 𝑀 decreases by one unit. Thus, the vast majority of earthquakes occur at magnitudes so small that the vibrations they cause can barely be recorded at the surface of Earth. Given that earthquakes are the symptoms …
-
Refining tsunami inundation limits for the 1700 CE Cascadia earthquake: detailed mapping of fine-grained deposits and diatom biostratigraphy at the Salmon River estuary, central Oregon
… of the 1700 CE Cascadia Subduction Zone (CSZ) earthquake and tsunami. Such evidence has been used to evaluate earthquake source models by comparing simulated tsunami inundation or sediment deposition to the mapped extent of sandy tsunami deposits. However, post-tsunami surveys of modern events, …
-
Defining historical earthquake rupture parameters and proposed slip distributions through tsunami modeling in south-central Chile
… to select a suite of tsunami simulations from earthquake source solutions. I chose south-central Chile (46°S to 30°S) to test this new methodology; it has an extensive earthquake historical record at 47 different coastal sites, some of which date to the 16<sup>th</sup> century. Between 1570 and …
-
Seismic hazard analysis and seismic slope stability evaluation using discrete faults in northwestern Pakistan
The Mw 7.6 earthquake that occurred on 8 October 2005 in Kashmir, Pakistan, resulted in tremendous number of fatalities and injuries, and also triggered numerous landslides. Although there are no reliable means to predict the timing of the earthquake, it is possible to reduce the loss of life and …
Page 1 of 2