Video Experimental Relacionado
Updated: Jul 2, 2026
14:42
Remote Magnetic Actuation of Micrometric Probes for in situ 3D Mapping of Bacterial Biofilm Physical Properties
Published on: May 2, 2014
Deslizamiento lento provocado por el magma en el volcán Kilauea, Hawai
Benjamin A Brooks1, James Foster, David Sandwell
1School of Ocean and Earth Science and Technology, University of Hawaii, 1680 East-West Road, Honolulu, HI 96822, USA.
Science (New York, N.Y.)
|August 30, 2008
Resumen
Una reciente intrusión de un dique probablemente desencadenó un evento de deslizamiento lento de fallas (SSE) en el volcán Kilauea. Tanto la intrusión como el flujo de falla de fondo pueden conducir a estos eventos sísmicos significativos.
Área de la Ciencia:
- * Volcanología y Tectonofísica.
- * Geodesia y teledetección.
Sus antecedentes:
- * El volcán Kilauea exhibe eventos lentos de deslizamiento de fallas (SSEs) en su flanco sur móvil.
- * La interacción entre las intrusiones volcánicas y las ESS requiere más investigación.
Objetivo del estudio:
- * Para determinar si una reciente intrusión en un dique desencadenó un SSE en el flanco sur de Kilauea.
- * Comprender los factores que contribuyen (intrínsecos y extrínsecos) a las SSEs en Kilauea.
Principales métodos:
- * Datos de interferometría de radar satelital del satélite de observación terrestre avanzado integrado (ALOS) para la intrusión en diques.
- * Se utilizaron datos continuos del Sistema de Posicionamiento Global (GPS) para la deformación del suelo.
- * Cambios de tensión de la falla de Coulomb modelados tanto de la deformación secular como de la intrusión en el dique.
Principales resultados:
- * Los patrones de deformación después de la intrusión fueron casi idénticos a los SSE anteriores.
- * Tanto la intrusión del dique como la deformación secular aumentaron significativamente el estrés por falla de Coulomb.
- * Las SSE anteriores ocurrieron durante la deformación de fondo, no directamente después de las intrusiones.
Conclusiones:
- * Factores extrínsecos como las intrusiones de diques pueden desencadenar SSEs.
- * Los factores intrínsecos como el deslizamiento de fallas seculares también contribuyen a las ESS.
- * Ambos procesos probablemente juegan un papel en las SSEs de Kilauea, destacando la compleja dinámica de fallas.
Videos de Conceptos Relacionados
01:17Magnetic Damping
Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
If, however, the bob is a slotted metal plate, the magnet produces a much smaller effect. When a slotted metal plate enters the field, an emf is induced by the change in flux; however, it is less effective because the slots limit the...
01:24Potential Due to a Magnetized Object
Magnetic dipoles in magnetic materials are aligned when placed under an external magnetic field. For paramagnets and ferromagnets, dipole alignment occurs in the direction of the magnetic field. However, the dipoles align opposite to the field in the case of diamagnets. This state of magnetic polarization due to the external field is called magnetization. Magnetization is defined as the dipole moment per unit volume. It plays a similar role to polarization in electrostatics.
The vector...
The vector...
01:27Magnetic Fields
A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
A magnetic field is defined by the force that a charged particle experiences...
01:18Magnetic Force
In addition to the electric forces between electric charges, moving electric charges exert magnetic forces on each other. A magnetic field is created by a moving charge or a group of moving charges known as the electric current. A magnetic force is experienced by a second current or moving charge in response to this magnetic field. Fundamentally, interactions between moving electrons in the atoms of two bodies produce magnetic forces between them.
The magnetic force acting on a moving charge...
The magnetic force acting on a moving charge...
01:28Magnetostatic Boundary Conditions
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
01:30Magnetism
Magnets are commonly found in everyday objects, such as toys, hangers, elevators, doorbells, and computer devices. Experimentation on these magnets shows that all magnets have two poles: one is labeled north (N) and the other south (S). Magnetic poles repel if they are alike and attract if unlike. Moreover, both poles of a magnet attract unmagnetized pieces of iron.
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...
An individual magnetic pole cannot be isolated. No matter how small, every piece of a magnet contains a north pole and a south...