Distances from the stations to the earthquake are estimated from the difference between P and S wave arrival times: You have just figured out how far your seismograph is from the epicenter and how ...

There are different kinds of earthquake waves: body waves and surface waves. Body waves pass through the interior of the Earth whereas surface waves travel along the Earth's surface. Explain that ...

Researchers have found new evidence for a massive subsurface ocean on Mars, again raising the possibility of microbial life.

Researchers examining seismic data recorded on Mars say the have found evidence supporting the presence of liquid water deep ...

The S wave shadow zone is the area of the Earth’s surface where S waves are not detected following an earthquake. This shadow zone has led geologists to a model of the Earth with a solid mantle ...

A recording of an earthquake has recognizable characteristics. Typically, one can recognize the arrival of different wave types. The P waves (the fastest traveling waves), S waves, and Surface waves ...

A seismometer is an instrument that records the shaking of the Earth's surface caused by seismic waves. The term seismograph usually refers to the combined seismometer and recording device. The first ...

Information from three stations can be used in order to locate the epicentre of the earthquake. If we know the time lag between the arrival of P and S waves, we can calculate the distance of the ...