Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusm.u33a..03f&link_type=abstract
American Geophysical Union, Spring Meeting 2004, abstract #U33A-03
Physics
0920 Gravity Methods, 0994 Instruments And Techniques, 1219 Local Gravity Anomalies And Crustal Structure, 1242 Seismic Deformations (7205), 1244 Standards And Absolute Measurements
Scientific paper
Measurements of absolute gravity are becoming increasingly important today in measuring the time-varying gravity that results from tectonic dislocations (earthquakes), vertical crustal motions (postglacial rebound) and the monitoring of magma motions (volcanology). Almost since the beginnings of scientific inquiry, absolute and relative gravity-using the then-available parts in 105 to parts in 106 level of precision and (sometimes) accuracy-were successfully used to study the shape of the earth. Today's parts in 109 absolute gravimeters permit the study, though the associated gravity changes, of a number of geophysical processes at the centimeter level of sensitivity. The ``hows,'' the ``where-froms,'' and also the ``limitations'' of both today's and tomorrow's absolute gravimeters will be discussed. Finally our recent development of a truly portable absolute gravimeter will be described and (somehow) demonstrated. [This latter development will be reported on in considerable detail during the session G09: New Sensors of Our Planet.]
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