Georod V2

Conducting seismic surveys in environments with loose ground cover such as snow, sand, or other unconsolidated materials often results in poor data due to inadequate coupling of the geophones to the ground. Land cases were designed for firm ground, not these harsh environments! The georod solves this problem.

Each Georod consists of four geophones connected in a series configuration such that their signals combine to increase the amplitude of the recorded signal. The large surface area and high aspect ratio of the instrument greatly increase the acoustic coupling to the surrounding media as well as reduce sensitivity to placing the instrument over a small area of especially unconsolidated material.

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Version 2 of the Georod houses the geophones inside a sealed body which, unlike version 1, can be opened for geophone replacements and repairs then resealed. This design offers the same rain storm proof reliability, but the repairability increases the service life of your investment. On models with Mueller clips, version 2 features a custom cable overmolding to increase wire insulation strain relief and reduce water ingress below the cable insulation. Models with split plate connectors feature unique modifications to the connector to work with older take out cables for which connectors are no longer available.

Georods have been used for many surveys in the harsh Antarctic polar environment with great improvements in survey data quality, field durability and reliability, and reduced setup/acquisition time. Georods can be manufactured with split plate connectors, Mueller clips, or any other custom connector required by your acquisition system. The standard Georod design utilizes high quality 40 Hz, 280 Ohm geophones, but different elements and shunt resistor combinations are available upon request. A durable metal strain relief protects the instrument data cable, rated to work in the harshest conditions. A pickup rope reduces fatigue during field retrieval.

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Field Notes

“We have successfully conducted the investigation thanks to you.” Hyeon Tae, Ju of the Korea Polar Research Institute turned to Leeman Geophysical LLC to help acquire seismic reflection data over ice flows in Antarctica. The Georod enabled the KPRI team to complete their survey quickly and with outstanding data quality! Georods have now been used over multiple field seasons to help the KPRI team study glacial dynamics and map the bed.