Figure 4.-- Seismic ground motions recorded on the Slumgullion landslide. All traces shown were recorded by the digital micro-array and are plotted on the same amplitude and time scales. Only vertical-component seismograms are shown, each was recorded by the sensor denoted by the nearest corresponding shaded circle (sensors are shown in "map view" similar to that shown in fig. 2-- 50-m scale bar refers to map view of sensors). The top trace spans a longer duration and includes the segment shown from sensor S3. A, Seismograms of probable slidequakes.

B, Sinusoidal-like seismograms.