The scientists used old seismic reflection data, which can indicate what is in an underground region by measuring the way small shock waves are affected when they pass through it.
42.
This limitation in areal extent is the reason why seismic reflection techniques are so popular; they provide a method for interpolating and extrapolating well log information over a much larger area.
43.
A marine seismic reflection study found evidence of faulting at the mouth of Budd Inlet, just north of the Olympia structure, and aligning with faint lineaments seen in the lidar imagery.
44.
In contrast, structures resulting from subduction erosion of the base of the forearc are difficult to recognize from seismic reflection profiles, so the possibility of basal erosion is difficult to confirm.
45.
A BSR is a seismic reflection indicating the lower limit of hydrate stability in sediments due to the different densities of hydrate saturated sediments, normal sediments and those containing free gas.
46.
Modern seismic reflection surveys are designed and acquired in such a way that the same point on the subsurface is sampled multiple times, with each sample having a different source and receiver location.
47.
Seismic reflection profiles, studied by USGS scientists, show that the crater was formed by an object or objects which struck from the southwest at a glancing angle and formed a long, oval crater.
48.
The John Clarence Karcher discovered seismic reflections independently while working for the United States Bureau of Standards ( now the National Institute of Standards and Technology ) on methods of sound ranging to detect artillery.
49.
The major conclusion Cook reached was that the ground is very difficult to'see through'by any physical process provided by nature, and that the conventional seismic reflection method was by far the best at that time.
50.
Researchers led by Jin-Oh Park of the Japan Marine Science and Technology Center in Yokohama discovered the fault using a seismic reflection profile, developed by measuring vibrations from the surface that are reflected back by deep rock formations.
