PDF-Seismic Wave Incoherency

1 andRelatedChallenges 1 Sunwoo Park PhDOffice of New ReactorsUS Nuclear Regulatory CommissionMarch 9 2011. Seismology- lecture 5. Barbara Romanowicz, UC Berkeley. CIDER2012, KITP. Seismological tools. Seismic tomography: surface waves, overtones. Volumetric distribution of heterogeneity. “smooth” structure – depth resolution ~50 km. Seismic velocities – P & S. Relationship to elastic moduli. Seismic anisotropy. . -- directional variation in seismic velocity. Seismic Attenuation – 1/. Q. p. & 1/Q. s. . -- What is seismic attenuation?. Meteor Crater, Arizona. Soumya. Roy, Ph. D. Student. Advisor: Dr. Robert R. Stewart. AGL Annual Meeting. University of Houston, 2. nd. May 2012. Journey Through . A. n . Astrobleme. Objectives . Meteor Crater, Arizona. Glenn . Biasi. 1. , Leiph . Preston. 2. , and Ileana . Tibuleac. 1. Nevada Seismological Laboratory, University of Nevada Reno, Reno, NV 89557. 2. Sandia National Laboratory, Albuquerque, NM. Overview. ● What is Seismology?. ● What are Seismic Waves?: Types of Seismic waves. ● Where do Earthquakes Happen?. ● Why do Earthquakes Happen?. ● How is the Epicenter of an Earthquake Located?. ● How are Earthquakes Magnitude Measured?. What interactions can waves undergo?. Name: ________________ Date: ___________. . 6.P.1.1 Waves: Forces and Motion. EQ: What interactions can waves undergo?. Reflection... head your notes like this!. Seismology: the study of earthquakes. Seismic waves: terminology, classification, the transfer of energy, how waves move. Measuring earthquakes. Layers of the Earth and seismic waves. What information a seismologist is able to interpret from a seismogram. Danny Hertel. EPS 109. Prof. . Militzer. Background/Method. As seismic waves travel through different mediums in the earth, the different mediums create different wave velocities. With geophones, the amplitude of the wave response can be measured at the surface and overlaid to create travel-time curves that tell what’s underneath.. Earthquake Mechanisms. Brittle Mechanical Model: “stick-slip”. Focal point: 3D point inside the lithosphere where the seismic event occurs. Epicenter: projection of focal point to the map surface . Part 1. Seismic Waves and Interior of the Earth. The behaviour of seismic waves in the different layers of the earth provides the most authentic evidence about the composition and structure of the earth. The different types of waves, generated during the occurrence of an earthquake, are generally divided into three broad categories: . Seismic waves: terminology, classification, the transfer of energy, how waves move. Measuring earthquakes. Layers of the Earth and seismic waves. What information a seismologist is able to interpret from a seismogram. teleseisms. ), the waves of greatest amplitudes are generally surface waves that have followed the Earth’s surface and not penetrated the interior. The exceptions are seismograms of deep focus earthquakes, which are not effective generators of surface waves, so that the body waves are more prominent. The dominance of surface waves on . Part 2: Speed of sound, waves, and bedrock. Image credit: J. Louie, University of Nevada-Reno. Outline. Speed of sound. Waves. Bedrock. Urban and wildland environments. Importance for human activities. Kurdistan Region- Iraq. Ministry of Higher Education . & Scientific Research. . Salahaddin. University- Erbil. Geology - 3th Year. 2. nd. Semester . Jan. . 202. 1. Lec.1. 2. Seismic Method . (Applied Seismology).