U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000


Skip to content U.S. Department of Transportation/Federal Highway AdministrationU.S. Department of Transportation/Federal Highway Administration

Bridges & Structures

 

Interstate Technical Group on Abandoned Underground Mines
An Interactive Forum

Locating and Characterizing Abandoned Mines Using Microgravity: Figure 3


Return to Paper

Two graphs.  The top is thickness vs distance the bottom is time vs distance as discussed below.

Figure 3. A 2-D geologic model (a) for simulating increasing spatial interval between the two coal seams. After convolution with a 150-Hz Ricker wavelet, the synthetic seismic response of the model (b) highlights the effects of seam separation, creating amplitude anomalies in the No. 5 coal seam reflection

Updated: 06/29/2015
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000