Indicador geoquímico del estrés tectónico que resultó en un terremoto en el centro de Japón, 1984
Video Experimental Relacionado
Updated: Jul 11, 2026

07:58
Data Processing Methods for 3D Seismic Imaging of Subsurface Volcanoes: Applications to the Tarim Flood Basalt
Published on: August 7, 2017
Resumen
Las anomalías de gas en una fumarola japonesa y un manantial mineral precedieron a un terremoto de magnitud 6.8. Esto sugiere que los fluidos profundos fueron liberados por el estrés tectónico, ofreciendo perspectivas potenciales de predicción de terremotos.
Área de la Ciencia:
- La geoquímica es la geoquímica.
- Sismología Sismología.
- Ciencias ambientales Ciencias ambientales.
Sus antecedentes:
- Los terremotos pueden causar cambios en la corteza terrestre y la composición de fluidos.
- Estudios previos han documentado emisiones de fluidos profundamente arraigados vinculados al estrés geológico.
Objetivo del estudio:
- Para investigar los cambios en la composición de los gases que preceden a un gran terremoto en el interior.
- Para explorar la relación entre el estrés tectónico y las emisiones de fluidos.
Principales métodos:
- Monitoreo de la composición del gas en una fumarola y un manantial mineral.
- Analizar las anomalías de gas en relación con los eventos sísmicos.
Principales resultados:
- Se observaron cambios significativos en la composición del gas en ambos sitios antes del terremoto de 1984 en el centro de Japón (magnitud 6.8).
- Los sitios monitoreados estaban ubicados a 9 km y 50 km del epicentro.
Conclusiones:
- Las anomalías de gas observadas probablemente resultaron de fluidos profundos expulsados por el estrés tectónico.
- Este fenómeno puede ofrecer información sobre la predicción y el monitoreo de terremotos.
Videos de Conceptos Relacionados
Nuclear Stability
Protons and neutrons, collectively called nucleons, are packed together tightly in a nucleus. With a radius of about 10−15 meters, a nucleus is quite small compared to the radius of the entire atom, which is about 10−10 meters. Nuclei are extremely dense compared to bulk matter, averaging 1.8 × 1014 grams per cubic centimeter. If the earth’s density were equal to the average nuclear density, the earth’s radius would be only about 200 meters.
To hold positively charged protons together in the...
To hold positively charged protons together in the...
Radioactive Decay and Radiometric Dating
Radioactivity is a spontaneous disintegration of an unstable nuclide and is a random process, as all the nuclei in the sample do not decay simultaneously. The number of disintegrations per unit time is called the activity (A), which is directly proportional to the number of nuclei in the sample. The decay constant (λ) is an average probability of decay per nucleus in unit time.
Stress-Strain Diagram
A stress-strain diagram is a crucial tool that graphically displays a material's mechanical characteristics. This diagram is derived from a tensile test performed on a carefully prepared cylindrical specimen. The specimen has two gauge marks inscribed on its central part, and the distance between these marks is known as the gauge length. The cylindrical specimen is placed in a testing machine, which applies an increasing centric load. As this load grows, so does the gauge length. This change in...
Stress-Strain Diagram - Ductile Materials
The stress-strain relationship in ductile materials such as structural steel or aluminium is intricate and progresses through several stages. When a specimen is loaded, it initially exhibits a linear length increase, depicted by a steep straight line on the stress-strain diagram. It indicates the material is elastically deforming and will return to its original shape once unloaded. However, when a critical stress value is reached, plastic deformation begins. This stage sees substantial...
Stress-Strain Diagram - Brittle Materials
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
Fault Types
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...
For line-to-line faults occurring between phases B and C, the...

