Martha Euvnuk of Boston University operates a slide-hammer seismic source during a seismic refraction survey of a Manhatta-era mixed-waste disposal site at the Los Alamos National Laboratory. An important "lesson learned" is the difficulty of working through asphalt, which generally had to be removed.
Twenty seven undergraduate and
graduate students attended the Summer of Applied Geophysical Experience
(SAGE) in 1998. Students
attended from 23 institutions from the United States, Mexico, and
Germany. Participants worked on two separate projects. The first
was an ambitious
study of the southern Espanola basin of the Rio Grande
rift, imaging subsurface sedimentary units and buried faults to depths
of several kilometers. This work was part an ongoing project to study
the tectonics of the rift. The techniques used for this basin-scale
project were seismic refraction/ reflection (using a Vibroseis source),
gravity, magnetics, and several electro-magnetic techniques. The
Vibroseis technique uses hydraulically driven vibrators mounted on
truck or tractor
chassis to generate seismic waves. It is an environmentally benign
technique, widely used in the petroleum exploration field as a powerful
source of seismic energy.
A. Peter Annon of Sensors & Software instructs Tricia Geib (Purdue University) in field processing of ground-penetrating radar data, which students have just collected.