[2] The LSPE differed from the Active Seismic Experiment by having larger explosive packages that could be deployed further away allowing for the greater exploration at depth.

[3] The experiment's components primarily consisted of an array of four geophones and eight explosive charges of mixed yield.

Each explosive charge consisted of molded Hexanitrostilbene and Teflon in a 90:10 ratio and were similar in composition to those that flew as part of Apollo 14.

If the safe arm timed mechanism released early the safe/arm pull ring would be locked into place and could not be removed.

[5] The mission's second and third EVA were used to place the explosive packages at a variety of locations, with varying distances and directions from the Apollo 17 landing site.

[5] The eight explosive charges provided detectable seismic two-way traveltime signal down to depths of 2.7 km.

The impact of the Apollo 17 lunar module ascent stage provided a detectable two-way signal from a depth of 5 km of the Moon's surface.

The instrument identified that beneath the Apollo 17 landing site there were three layers in the upper 5 km, with distinctive seismic velocity properties.

[2] The experiment package provided passive observation of lunar seismic events between August 15, 1976, and April 25, 1977.