geophysics 2 min read
The external magnetic field
The changes in geomagnetic field caused by external sources have lower amplitude than changes stemming from the internal changes, however,…
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Magnetic field of the Earth
From the point of view of the magnetic exploration we can divide the Earth’s magentic field onto three componenets: 1.…
geophysics 2 min read
Applications of the gravity method
The gravity measurements could, obviously, be applied anywhere where sufficient density contrast is expected. Nevertheless, there are situations and field…
geophysics 3 min read
Gravity data interpretation
The interpretation of gravity data could be only a simple qualitative analysis in a way: “Look, there is a sharp…
geophysics 2 min read
Gravity data processing
Once the gravity data are measured the more demanding task is to be carried out – the data processing and…
geophysics 2 min read
Gravity effect of selected bodies
The simple geometrical bodies are often used for the modelling before the survey is carried out. The aim is to…
geophysics 2 min read
Rock densities
The densities of rocks (Tab. 1.1), naturally, depends on the mineral composition of particular rock. However, not only mineral composition,…
geophysics 2 min read
Gravity meters
Basically, there are two main gravity types – the absolute and relative gravity meters. In geophysical prospection solely the former…
geophysics 3 min read
Gravity field of the Earth and data reduction
Because the Earth is not a perfect homogeneous sphere, the gravitational acceleration is not constant over the whole Earth’s surface.…
geophysics 2 min read
Newton’s Law of Gravitation
Everyone is familiar with the Earth pull or attractive force. It causes thing s to fall and is also responsible…
geophysics 4 min read
Earthquake prediction and control
No natural event is as destructive over so large an area in so short a time as an earthquake. Throughout…
geophysics 3 min read
Geothermal energy
Another alternate energy resource is the heat from the Earth’s interior. The surface expression of this energy is manifested in…