Ocean-bottom seismometer
Videos
An ocean-bottom seismometer is a seismometer that is designed to record the earth's motion under oceans and lakes from man-made sources and natural sources.
An ocean-bottom seismometer goes over the side of R/V Oceanus in early 2001, off Barbados. It will record long-period, low-frequency seismic waves for up to a year before the ship returns to retrieve the instrument. (Photo by John Whitehead, Woods Hole Oceanographic Institution)
Ocean Bottom seismometer
This shows a P wave (red) converting into an S wave (blue), with the P wave having the ability to travel through the ocean and reflect bown off of the surface into the seismometer. This creates water multiples that do not exist when the seismometer has free-air above it.
Geophone
Videos
A geophone is a device that converts ground movement into voltage, which may be recorded at a recording station. The deviation of this measured voltage from the base line is called the seismic respons
Ocean-bottom seismometer
…information about the deep structure of the Earth's crust and upper mantle in offshore areas. OBS may be equipped with a maximum of a three-component geophone in addition to a hydrophone, and thus it needs a capacity of more than 144 Mbytes, which would be the minimum for adequate MCS profiling. In a typical…
Geophone (SM-24), frequency band 10 Hz to 240 Hz, standard resistance 375 Ω
Geosource Inc. MD-79—8 Hz, 335 Ω geophone
Man using a geophone
Single End Spread & Split Stread