Table 2: Dominant periods and classification of the type of soil for the seismic stations within the different arrays (http://www.nehrp.gov/).

FREQUENCYDOMINANT PERIODNEHRP CLASSIFICATION

STATION 1. Array #1 and array #2

3.17 Hz0.315 sSolid Ground

STATION 3. Array #1 and array #2

3.35 Hz0.298 sSolid Ground

STATION 4. Array #1

12.74 Hz0.078 sRock

STATION 2. Array #2

1.2 Hz0.833 sSoft Ground