seismic Articles

  • Passive Seismic

    Passive seismic exploration methodology, in particular the IPSS/IPDS (Infrasonic Passive Seismic Spectroscopy/ Infrasonic Passive Differential Spectroscopy ) and PST/MST (Passive Seismic Tomography/Micro Seismic Tomography) technique uses spectroscopic and time analysis of the seismic background noise acquired passively using high sensitivity VBB (Very Broad Band) 3D seismometers.  Passive ...

  • Seismic Reflection Method

    Compiled and rigorously edited stacking velocity data to produce velocity maps at specified travel time intervals. These maps were verified to be extremely accurate, enabling exploration staff at AMOCO Production's Alaska North Slope group to make much needed time-depth conversions. Produced time-structure Maps via interpretation of Gulf Coast seismic reflection data while employed with Conoco, ...


    By ECA Geophysics

  • Seismic reflection, seismic crosshole and ground penetrating radar case study

    Geophysical Investigation of the Crosstown Expressway. Tampa, FL In April, 2004 Pier 97 which supported an elevated roadway in Tampa, FL was vertically displaced (collapsed) approximately 10 feet (ft). At the time of the collapse it was not known whether the collapse was associated with geological conditions at the site, specifically karst conditions, or whether is was associated with a ...


    By GeoView, Inc.

  • Seismic refraction and MASW case study

    Proposed Gatun Bridge, Colon, Panama The Autoridad del Canal de Panama (ACP) conducted a geotechnical investigation along the footprint of a proposed bridge crossing of the Panama Canal, north of the Gatun Lock. As part of the geotechnical study, GeoView, Spotlight Geophysics and ATI Panamericana were tasked to provide seismic P-wave and S-wave velocity structure of the subsurface. The ...


    By GeoView, Inc.

  • Seismic Sequence Monitoring in Cephalonia, Greece - Case Study

    Seismic Sequence Monitoring Project Area: Approximately 360km2 Seismic Network: 10 stations Recording Period: #11;43 days Two major earthquakes, ML=5.8/Mw=6.0 and ML=5.7/Mw=5.9 occurred in the island of Cephalonia (western Greece) on the 26 of January 2014 13:55 UTC (15:55 local time) and on the 3rd February 2014 03:08 UTC (05:08 local time), producing ...


    By SeismoTech Ltd

  • Seismic protection of critical infrastructures through innovative technologies

    Development of new technologies for seismic protection will better support the sustainable urban systems. The paper focuses on development of an innovative technology for seismic protection of bridges using smart materials. The seismic protection of structures with the use of special devices is widely accepted as a very effective technique, both for new constructions and for retrofitting of ...


    By Inderscience Publishers

  • Seismic performance of polymer modified concretes in flexure–modelling

    Considerable research has been carried out in the recent years in the development of models to simulate the inelastic responses of reinforced concrete elements. The enhancement of ductility and the post–peak behaviour are of special interest for the seismic design of structures. Polymer modified fibre concretes are found to be ideal for seismic application with its inherent structural ...


    By Inderscience Publishers

  • geological prospecting & seismic device manufacturing industry in China

    China geological prospecting and seismic device manufacturing industry, 2015 is valuable for anyone who wants to invest in the geological prospecting and seismic device manufacturing industry, to get Chinese investments; to import into China or export from China, to build factories and take advantage of lower costs in China, to partner with one of the key Chinese corporations, to get market ...


  • Seismic refraction for weather zone assessment in vibroseismic processing

    Refraction seismic measurements for the determination of the seismic velocities in the shallow subsurface have been performed close to Valence (F) for our partner Partner Gallego Technic Geophysics. 44 profiles with a length of 240m have been acquired in August 2016. Seismic velocities of the shallow geological layers and the bedrock could be determined to a depth of up to 25m. Results from ...


    By Geo2X

  • Response of frames seismically protected with passive systems in near–field areas

    The present paper analyses the behaviour of moment resisting frames in reinforced concrete subject to earthquakes recorded in near–field areas. In these areas, the signals show impulsive–type accelerograms, with velocity and displacement peaks higher than in far–field zones especially for the fault–normal component of the ground motion velocity in the direction of propagation of the wave, which ...


    By Inderscience Publishers

  • How Seismic Use Group Classification affects your Water Storage Tank

    When purchasing a bolted steel tank or a welded steel water storage tank, one of the key criteria determining the design parameters of the tank is the Seismic Use Group (SUG) classification. The term Seismic Use Group is essentially the same as the terms Occupancy Category and Risk Category used by the International Building Code (IBC) and the ...


    By Superior Tank Co., Inc.

  • Seismic study at the Pacific and Atlantic locks of the panama canal case study

    Panama Canal Zone Grupo Unidos Por el Canal (GUPC) was tasked with characterizing subsurface conditions within the Third Set of Locks Project for the Panama Canal. In support of their characterization efforts, GUPC requested that seismic geophysical data be acquired at four locations within the project area.  These locations include portions of the: Miraflores ...


    By GeoView, Inc.

  • Mapping Top of Rock with Seismic Refraction and ERI case study

    Industrial Facility, Tennessee An environmental assessment and remediation design project was conducted at a chemical manufacturing facility in eastern Tennessee. As part of the project, GeoView was asked to determine the depth to limestone bedrock underlying the project site and identify any suspected karst features within the upper portion of the limestone stratum. ...


    By GeoView, Inc.

  • Geotechnical Geophysics: Seismic refraction and refraction microtremor (ReMi) surveys

    ReMi Surveys are superior to MASW Surveys in the following ways: Ambient (ie, traffic and aircraft) “noise” is a hindrance to MASW surveys, yet is readily embraced / utilized by “passive” ReMi surveys Longer ReMi data records (ie, 30 seconds vs 8 seconds or less with MASW) capture lower frequency events We introduce high frequency impulsive energy that ...


    By ECA Geophysics

  • Passive Seismic Tomography Project Phase II in Assam, India - Case Study

    Passive Seismic Tomography Project Phase II Project Area: approximately 2000km2 Seismic Network: 76 stations Recording Period: 9 months Number of Seismic Events located/used: 276/263 The scope of this project, which followed a successful Phase I Passive Seismic Tomography survey in the same area, was to provide accurate and reliable 3D P-wave ...


    By SeismoTech Ltd

  • Passive Seismic Tomography Feasibility Study in Aguacate, Mexico - Case Study

    Passive Seismic Tomography Feasibility Study Project Area: Approximately 2km2 Seismic Network: 5 stations Recording period: 12 days Seismotech’s personnel installed five seismic stations at the Aguacate hydrocarbon production area in Mexico, aiming to record the seismicity and evaluate the potential microseismic activity on this specific area. ...


    By SeismoTech Ltd

  • Three–dimensional seismic tomography with tetrahedra element on isoparametric mapping

    The author has developed a method of three–dimensional seismic tomography on concrete structures. This method is based on ray–trace and identification technique, and the distribution of slowness or energy dissipation is identified based on simultaneously iterative reconstruction technique (SIRT) or the other kind of statistical identification technique. This kind of technique was originally ...


    By Inderscience Publishers

  • Earthquake proofing of water treatment plants through seismic system risk analysis

    In Japan, earthquake resistance improvement (earthquake proofing) of drinking water infrastructure is not as developed as for other types of infrastructure such as gas and electricity. To facilitate earthquake proofing, it is important for water utilities to encourage customers to better understand its importance and effectiveness. So that water consumers could instinctively understand the ...


    By IWA Publishing

  • Analysis of seismic vulnerability using remote sensing and GIS techniques

    This paper presents a framework to integrate several sources of spatial information to derive a map of seismic vulnerability for the city of Arica, Chile, which has been historically affected by this natural hazard. The proposed method is based on generating a geographical database with different variables that are related to human activity, considering factors of potential reduction and increase ...


    By Inderscience Publishers

  • Passive Seismic Tomography Project Phase I in Delvina, Albania Case Study

    Passive Seismic Tomography Project Phase I Project Area: approximately 900km2#11; Seismic Network: 50 stations Recording Period: 11 months Number of Seismic Events located/used: 2500/1860 The scope of this project was to provide coarse, but reliable 3D P-wave velocity and Vp/Vs models, adequate for a reconnaissance stage mapping of an area of ...


    By SeismoTech Ltd

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