Video Experimental Relacionado
Updated: Jul 10, 2026
07:58
Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
Published on: August 7, 2017
El levantamiento acelerado y la intrusión magmática de la caldera de Yellowstone, 2004 a 2006
Wu-Lung Chang1, Robert B Smith, Charles Wicks
1Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112, USA. wchang@earth.utah.edu
Science (New York, N.Y.)
|November 10, 2007
Resumen
La caldera de Yellowstone experimentó una rápida elevación del suelo a partir de 2004, lo que indica una recarga de magma. Este evento geológico, medido por GPS y radar, sugiere un umbral volcánico que se expande debajo de la superficie.
Área de la Ciencia:
- La geofísica es la geofísica.
- Volcanología Volcanología.
- La detección remota con sensores.
Sus antecedentes:
- La caldera de Yellowstone exhibe una deformación significativa del suelo.
- Las tasas de inflación anteriores fueron considerablemente más bajas que las observadas después de 2004.
Objetivo del estudio:
- Para investigar la causa de la elevación acelerada del suelo en la caldera de Yellowstone desde 2004.
- Para modelar la fuente subterránea responsable de la deformación observada.
Principales métodos:
- Utilizó datos del Sistema de Posicionamiento Global (GPS) para mediciones precisas del movimiento del suelo.
- Empleado radar de apertura sintética interferométrica (InSAR) para mapear la deformación de la superficie.
- Aplicó técnicas de modelado de fuentes para interpretar los datos de deformación.
Principales resultados:
- Se observaron tasas de elevación del suelo de hasta 7 cm/año, más de tres veces las tasas anteriores.
- Modelado un umbral volcánico (aprox. 1200 km2) a 10 km de profundidad, coincidiendo con una cámara de magma.
- Se estima un aumento del volumen de la fuente de 0,1 km cúbicos / año, consistente con la intrusión de magma.
Conclusiones:
- La elevación acelerada se atribuye principalmente a la recarga de magma en el sistema de magma de la corteza.
- La presurización de los fluidos magmáticos es un posible, aunque menos probable, factor contribuyente.
- Los hallazgos proporcionan una visión crítica de los procesos magmáticos y los disturbios de Yellowstone.
Videos de Conceptos Relacionados
01:50Threats to Biodiversity
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
01:50Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
01:12Temperature Dependent Deformation
In a nonhomogeneous rod made up of steel and brass, restrained at both ends and subjected to a temperature change, several steps are involved in calculating the stress and compressive load. Due to the problem's static indeterminacy, one end support is disconnected, allowing the rod to experience the temperature change freely. Next, an unknown force is applied at the free end, triggering deformations in the rod's steel and brass portions. These deformations are then calculated and added together...
01:19Displacement Current
Ampère's law, in its usual form, does not work in places where the current changes with time and is not steady. Thus, Maxwell suggested including an additional contribution, called the displacement current, Id, to the real conduction current I.
01:28Significance of Displacement Current
A displacement current is analogous to a real current in Ampère's law, participating in Ampère's law the same way as the usual conduction current. However, it is produced by a changing electric field. Displacement current is defined in terms of a time-varying electric field, and also has an associated displacement current density. By adding a term accounting for displacement current, Maxwell modified the existing Ampère's law, which is now called generalized Ampère's law.
01:19Expansion and Contraction in Masonry Walls
Masonry walls are subject to slight expansion and contraction due to variations in temperature and moisture. Thermal movement in masonry is relatively straightforward to measure and plan for. On the other hand, moisture movement poses more of a challenge. New clay masonry units typically absorb water and expand over time under normal environmental conditions. Conversely, new concrete masonry units tend to shrink as they lose the excess moisture acquired during their production process.
To...
To...