Video Experimental Relacionado

Updated: Apr 13, 2026

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling

Kinematic History of a Salient-recess Junction Explored through a Combined Approach of Field Data and Analog Sandbox Modeling

Published on: August 5, 2016

Las correlaciones entre las mareas y los temblores y la presión de los poros casi litostática en la profunda falla de

Amanda M Thomas¹, Robert M Nadeau, Roland Bürgmann

¹Department of Earth and Planetary Science, Berkeley Seismological Laboratory, University of California-Berkeley, 307 McCone Hall, Berkeley, California 94720-4767, USA. amthomas@berkeley.edu

|December 25, 2009

Resumen

El temblor no volcánico, previamente inexplicable, está relacionado con la falla de cizallamiento en fallas críticamente estresadas. Esta actividad sísmica, observada cerca de Parkfield, California, ocurre con una presión de poro casi litostática, ofreciendo nuevos conocimientos sobre la mecánica de las fallas.

Área de la Ciencia:

La geofísica es la geofísica.
Sismología Sismología Sismología.
La tectónica de placas es la tectónica de placas.

Sus antecedentes:

Los temblores no volcánicos proporcionan información sobre el subsuelo de la Tierra, que anteriormente se creía incapaz de radiación sísmica.
Los procesos geológicos precisos que impulsan la generación de temblores siguen siendo incompletamente entendidos.
El temblor en las zonas de subducción (Japón, Cascadia) está relacionado con eventos de deslizamiento lento y altas presiones de los poros, lo que sugiere la influencia del fluido.

Objetivo del estudio:

Investigar la relación entre el estrés de las mareas y la actividad de temblores no volcánicos.
Determinar las condiciones y mecanismos responsables de la generación de temblores en la Falla de San Andrés.
Explorar la aplicabilidad de los hallazgos a otros entornos tectónicos.

Principales métodos:

Análisis de datos sísmicos para identificar temblores no volcánicos.
Correlación de las ocurrencias de temblores con el estrés de marea medido geodéticamente.
Examen de la tensión de falla y las condiciones de presión de los poros.

Principales resultados:

Se identificó una fuerte correlación entre el estrés de corte pequeño inducido por las mareas y el temblor no volcánico cerca de Parkfield, California.
El temblor en la Falla de San Andrés parece representar una falla de cizallamiento bajo estrés crítico y presión de poro casi litostática.
Existen similitudes entre los temblores en las zonas de subducción y en la falla transformada de San Andrés.

Conclusiones:

Las tensiones de marea pueden desencadenar temblores no volcánicos en fallas críticamente estresadas.
La presión de los poros casi litostática es un factor clave en la generación de temblores.
Los mecanismos que impulsan el temblor pueden ser consistentes en diferentes entornos tectónicos, incluidas las zonas de subducción y las fallas de transformación.

Más Videos Relacionados

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod

Published on: August 17, 2016

A Strain Gauge Monitor SGM for Continuous Valve Gape Measurements in Bivalve Molluscs in Response to Laboratory Induced Diel-cycling Hypoxia and pH

A Strain Gauge Monitor SGM for Continuous Valve Gape Measurements in Bivalve Molluscs in Response to Laboratory Induced Diel-cycling Hypoxia and pH

Published on: August 1, 2018

Videos de Conceptos Relacionados

Tidal Forces

Tidal Forces

The origin of Earth's ocean tides has been a subject of continuous investigation for over 2000 years. However, the work of Newton is considered to be the beginning of the proper understanding of the phenomenon. Ocean tides are the result of gravitational tidal forces. These same tidal forces are present in any astronomical body; they are responsible for the internal heat that creates the volcanic activity on Io, one of Jupiter's moons, and the breakup of stars that get too close to...

Fluid Pressure

Fluid Pressure

In mechanical engineering, fluid pressure plays a critical role in designing systems that utilize liquid flow, such as hydraulic systems, pumps, and valves. When designing these systems, engineers must ensure they can withstand the forces created by fluid pressure to avoid damage or failure.
According to Pascal's law, a fluid at rest will generate equal pressure in all directions. This pressure is measured as a force per unit area, and its magnitude depends on the fluid's specific...

Fluid Pressure over Curved Plate of Constant Width

Fluid Pressure over Curved Plate of Constant Width

When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...

Pressure Variation in a Fluid at Rest

Pressure Variation in a Fluid at Rest

In a fluid at rest, the pressure at any point beneath the fluid surface depends solely on the depth, not on the container's shape or size. This principle, known as hydrostatic pressure, arises because, in stationary fluids, there is no acceleration, meaning the forces within the fluid balance out. Only vertical forces, caused by the weight of the fluid above, contribute to pressure changes with depth.
When measuring pressure at two different levels within the fluid, the difference in...

Hydrostatic Pressure Force on a Curved Surface

Hydrostatic Pressure Force on a Curved Surface

Hydrostatic pressure on curved surfaces is a fundamental concept in fluid mechanics with broad applications in the civil engineering field. When fluid is in contact with a curved surface, as in a reservoir, dam, or storage tank, it exerts pressure that varies in magnitude and direction along the curved surface. To assess the total hydrostatic force exerted by the fluid on a curved structure, engineers typically isolate the fluid volume adjacent to the surface and analyze the forces acting on...

Deep Sea Microbial Ecology

Deep Sea Microbial Ecology

The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches...