A New Long-Period Vertical-Component Seismometer Open PDF Document Details Document Type Technical Report Publication Date Nov 01, 1965 Accession Number ADA950168 Entities People A. D. Beach Organizations Atomic Weapons Establishment Tags Communities of Interest Energy and Power Technologies DTIC Thesaurus Topics Assembly Center Of Gravity Convection Frequency Geometry Helical Springs Leaf Springs Low Temperature Materials Recording Systems Seismographs Seismometers Springs Stiffness Surface Waves Tensile Strength Transducers