Video Experimental Relacionado
Updated: Jul 12, 2026
06:55
Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling
Published on: August 5, 2016
El potencial sísmico revelado por el plegamiento de la superficie: 1983 Coalinga, California, terremoto
Science (New York, N.Y.)
|May 25, 1984
Resumen
El terremoto de Coalinga de 1983 dobló elásticamente las capas de la corteza en lugar de romper la superficie. El análisis de datos sísmicos, geodésicos y geológicos revela tasas de deslizamiento de fallas subterráneas y intervalos de recurrencia de terremotos.
Área de la Ciencia:
- * Sismología y Tectónica.
Sus antecedentes:
- * El terremoto de Coalinga de 1983 (Mw 6.5) no rompió los depósitos superficiales.
- En cambio, causó plegamientos elásticos en la corteza superior.
Objetivo del estudio:
- * Para estimar las tasas de deslizamiento de fallas subterráneas.
- * Para determinar los tiempos de repetición de terremotos para la región de Coalinga.
- * Investigar la relación entre las fallas inversas ocultas y los pliegues activos.
Principales métodos:
- * Integración de datos sísmicos.
- * Utilización de mediciones geodésicas.
- * Análisis de evidencias geológicas.
Principales resultados:
- * El terremoto resultó en el plegamiento elástico de la corteza poco profunda.
- * Se estimaron las tasas de deslizamiento de fallas subterráneas y los intervalos de repetición de terremotos.
- * Tres terremotos más grandes (hasta Mw 7.5) en los últimos 20 años ocurrieron en fallas reversa ciegas debajo de pliegues activos.
Conclusiones:
- * Los terremotos pueden ocurrir en fallas ocultas debajo de los pliegues superficiales.
- * La deformación elástica de la corteza terrestre juega un papel importante en los eventos sísmicos.
- * La comprensión de las fallas ciegas es crucial para la evaluación del peligro sísmico.
Videos de Conceptos Relacionados
01:20Elastic Strain Energy for Shearing Stresses
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
01:29Equipotential Surfaces and Field Lines
Electric potential can be pictorially represented as a three-dimensional surface. On such a surface, the electric potential is constant everywhere. The equipotential surface is always perpendicular to the electric field lines, and while it is three-dimensional, it can be treated as an equipotential line in a two-dimensional case. These equipotential lines are also always perpendicular to electric field lines. The term equipotential is often used as a noun, referring to an equipotential line or...
01:22Elastic Strain Energy for Normal Stresses
Strain energy quantifies the energy stored within a material due to deformation under loading conditions, a fundamental concept in materials science and engineering. The strain energy can be modeled when a material is subjected to axial loading with uniformly distributed stress. In this scenario, the stress experienced by the material is the internal force divided by the cross-sectional area, and the strain induced is directly proportional to this stress through the modulus of elasticity.
If...
If...
01:30Bending Moment Diagram
A bending moment diagram is a graphical representation of the bending moments experienced by a beam under load along the beam length. It is an essential tool for engineers and designers to analyze structures and ensure they can withstand applied forces. The steps to create the bending moment diagram for a beam are listed below.
Determine reactive forces and couple moments: Calculate all the reactive forces and couple moments acting on the beam. In certain cases, when the beam is inclined at an...
Determine reactive forces and couple moments: Calculate all the reactive forces and couple moments acting on the beam. In certain cases, when the beam is inclined at an...
01:01Elastic Potential Energy
Elastic potential energy is the energy stored as a result of the deformation of an elastic object, such as the stretching of a spring. An object is elastic if it returns to its original shape and size after being deformed.
Potential energy is also associated with the elastic force exerted by an ideal spring. The work done by this force can be represented as a change in the elastic potential energy of the spring. Thus, the work done by a perfectly elastic spring, in one dimension, depends only...
Potential energy is also associated with the elastic force exerted by an ideal spring. The work done by this force can be represented as a change in the elastic potential energy of the spring. Thus, the work done by a perfectly elastic spring, in one dimension, depends only...
01:26Influence of Earth's Curvature and Atmospheric Refraction on Leveling
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance. Over a...