Report of a workshop on technical approaches to construction of a seafloor geomagnetic observatory
Chave, Alan D.
Green, Arthur W.
Filloux, Jean H.
Law, Lawrie K.
Petitt, Robert A.
Rasson, Jean L.
Spiess, Fred N.
Tivey, Maurice A.
Webb, Spahr C.
MetadataShow full item record
This report considers the technical issues on sensors, data recording and transmission, control and timing, power, and packaging associated with constricting a seafloor geomagnetic observatory. Existing technologies either already in use for oceanographic purposes or adapted from terrestral geomagnetic observatories could be applied to measure the vector magnetic field components and absolute intensity with minimal development. The major technical challenge arises in measuring absolute direction on the seafloor because terrestral techniques are not transferrable to the deep ocean. Two solutions to this problem were identified. The first requires the development of an instrument which measures the instantaneous declination and inclination of the magnetic field relative to a north-seeking gyroscope and the local vertical. The second is a straightforward extension of a precision acoustic method for determining absolute position on the seafloor.
Showing items related by title, author, creator and subject.
Deep-tow magnetic anomaly study of the Pacific Jurassic Quiet Zone and implications for the geomagnetic polarity reversal timescale and geomagnetic field behavior Tominaga, Masako; Sager, William W.; Tivey, Maurice A.; Lee, Sang-Mook (American Geophysical Union, 2008-07-26)The Jurassic Quiet Zone (JQZ) is a region of low-amplitude magnetic anomalies whose distinctive character may be related to geomagnetic field behavior. We collected deep-tow magnetic profiles in Pigafetta Basin (western ...
Tominaga, Masako; Sager, William W. (John Wiley & Sons, 2010-05-12)The current M-anomaly geomagnetic polarity timescale (GPTS) is mainly based on the Hawaiian magnetic lineations in the Pacific Ocean. M-anomaly GPTS studies to date have relied on a small number of magnetic profiles, a ...