Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
The waveform and AIC value. The AIC value is represented by the dashed line, the minimum AIC value denotes the first travel time. (a) Strong signal near the exciter, (b) weak signal far away from the exciter. Note the different scale on the y-axes in (a) and (b).
