The Mitla Landslide, an Event That Changed the Fate of a Mixteco/Zapoteco Civilization in Mesoamerica

Table 2

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

FREQUENCY	DOMINANT PERIOD	NEHRP CLASSIFICATION
STATION 1. Array #1 and array #2
3.17 Hz	0.315 s	Solid Ground
STATION 3. Array #1 and array #2
3.35 Hz	0.298 s	Solid Ground
STATION 4. Array #1
12.74 Hz	0.078 s	Rock
STATION 2. Array #2
1.2 Hz	0.833 s	Soft Ground