These phase transitions lead to a discontinuous increase in the density of the Earth's mantle that can be observed by seismic methods.

Most major oil companies also have actively conducted research into seismic methods as well as collected and processed seismic data using their own personnel and technology.

Electrical resistivity and seismic methods amongst others are used.

Philips building is the first concrete structure designed based on seismic methods in Iran.

Its purpose was to develop seismic methods for detecting underground nuclear testing.

In the meantime, there are significant environmental and economic advantages to the new seismic methods, which provide a vastly improved understanding of subterranean conditions.

Dr. Jones and his colleagues used a seismic method that has traditionally been used in oil and mineral prospecting.

Many geophysicists have been introduced to the seismic method and Anstey through his series of educational videos.

He conducted an experiment aiming at detecting subsurface water by a seismic method.

This frequency peak allows to constrain the possible models obtain using other seismic methods but is not enough to derive a complete ground model.