Essays about: "seismik"

Found 5 essays containing the word seismik.

  1. 1. Preprocessing of earthquake tremor data for tremor location

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Brian Rydgren; [2022]
    Keywords : Tremor; Earthquake; Volcano;

    Abstract : When analysing volcanic seismicity and volcanic events, it is often interesting to focus on tremor, which is a signal of long duration. This is because not much is known about tremor. Unlike earthquakes, sources of tremor are difficult to locate due to them not having any clear onsets in the seismic signal. READ MORE

  3. 2. Estimation of Relative Seismic Velocity Changes Around Katla Volcano, Using Coda in Ambient Seismic Noise

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Frida Jonsdottir; [2018]
    Keywords : Katla volcano; Iceland; ambient seismic noise; coda waves; relative velocity variations; Katla vulkan; Island; omgivande seismiskt brus; codavågor; relativa hastighetsvariationer;

    Abstract : Relative seismic velocity variations in the Earth’s crust can be estimated by using ambient seismic noise records from a pair of stations. Velocity variations can be caused by stress perturbations in the subsurface. Therefore, information on stress changes in the crust can possibly be retrieved from measured velocity variations in the medium. READ MORE

  4. 3. Behavior of Swedish Concrete Buttress Dams at Sesmic Loading

    University essay from KTH/Betongbyggnad

    Author : Erik Forsgren; Isak Berneheim; [2016]
    Keywords : seismic; Swedish earthquake; buttress dam; concrete; finite element analysis; seismik; jordbävning; lamelldamm; betong; finit element analys;

    Abstract : The aim of the thesis is to study the response of Swedish buttress dams if they are subjected to an earthquake of relevant magnitude to Sweden. Swedish dams are evaluated for an extensive amount of load cases, but not for earthquake loading. Therefore, it is not known how the Swedish buttress dams would respond during such loading. READ MORE

  5. 4. Semi-Analytical Finite Element method for guided waves in civil engineering plate-like structures

    University essay from Lunds universitet/Teknisk geologi; Lunds universitet/Väg- och vattenbyggnad (CI)

    Author : Christian Nielsen; [2015]
    Keywords : seismics; structural health monitoring; lamb waves; SAFE; semi analytical finite element; wave guide finite element; non destructive testing; civil engineering; ultrasound; ultrasonography; comsol; wave guide; plate; Technology and Engineering;

    Abstract : Guided waves have a signicant potential for Structural Health Monitoring (SHM) and Non-Destructive Testing (NDT) due to their relatively long distance of propagation and sensitivity to discontinuities along the propagation path, anywhere through the material thickness. The inability to model wave guides of arbitrary cross-section using current matrix methods, has led to the development of a technique called Semi-Analytical Finite Element (SAFE). READ MORE

  6. 5. Exploration of submarine fans along the Coffee Soil Fault in the Danish Central Graben

    University essay from Lunds universitet/Geologiska institutionen

    Author : Jakob Magnusson; [1999]
    Keywords : seismic; Early Cretaceous; Late Jurassic; Danish Central Graben; submarine fans; Earth and Environmental Sciences;

    Abstract : On the footwall side of the Coffee Soil Fault in the Danish Central Graben, five potential petroleum reservoir structures were distinguished on seismic images. The deposits were formed during the Late Jurassic-Early Cretaceous transition. READ MORE