Brief summary of the project: Research on a pressure transducer for measuring shock wave profiles. The majority of the effort of this program is aimed at selecting transducer materials, developing the physical techniques of assembly, developing the resistance-measuring circuitry and calibrating the pressure transducers. Project title: Study of Focal Mechanisms and Aftershock Characteristics of Name of sponsoring Federal agency: ARPA (via AFTAC). Contract expiration date: December 31, 1962. Brief summary of the project: Study of focal mechanisms and aftershock characteristics of small earthquakes. A network of approximately six new permanent seismographic stations is being established in central California. Provision is being made for telemetering the seismic data in analog form from these stations of the network to the central station at Berkeley, Calif. Three mobile seismograph stations and field parties are to be provided for dispatch to epicentral regions for a more detailed study of aftershock patterns. An intensive study is to be made of the characteristics of small earthquakes which occur in central California. Project title: Investigation of Seismic Wave Propagation Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $600,000 (2 years). Date of contract: June 1, 1960. Contract expiration date: May 31, 1962. Brief summary of the project: Investigation of seismic wave propagation phenomena directed toward differentiating between various types of seismic sources. Field measurements are being made to obtain seismic data from various types of explosive and natural sources. Study and analysis of the data with emphasis on energy spectrum, attenuation of energy, surface motion at the source, and propagation of shear waves is being conducted for the purpose of determining diagnostic characteristics of different sources on the basis of the recorded seismic waves. In addition, a seismometer is to be established and operated in a hole at a depth of the order of 1,500 feet to study the reduction in background noise level and nature of the noise at that depth. Project title: Development of Improved Seismographs Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $115,304 (——). Date of contract: June 15, 1960. Contract expiration date: Continuing. Brief summary of the project: Development of improved seismographs. One vertical and two horizontal component long-period seismometers have been designed according to certain specifications and have been constructed. Inclined seismographs are being investigated to determine their application to the problem of improving the detection and identification of seismic signals in the frequency band of 0.01 to 10 cps. In addition, the following topics are being investigated: long-period galvanometers, filtering, amplifiers, spectrum analysis, digitizers, and seismograph testing facilities. Project title: Seismometer Array and Data Presentation Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $1,488,470 (16 months). Contract expiration dates: Phase I, February 11, 1961; phase II, February 11, 1962. Brief summary of the project: Studies directed toward the means of processing and presenting seismographic data from as many as 100 seismometers disposed over an area lying within a 3 kilometer square have been conducted as work under phase I of this project. Under phase II a practical system is to be devised and constructed for the appropriate presentation of seismograph data processed in accord with one or more of the methods investigated under phase I. Project title: Field Study of the Variation in Characteristics of Seismic Noise and Signals With Geologic and Geographic Environment Name of sponsoring Federal agency: ARPA (via AFTAC). Contract expiration date: December 20, 1961. Brief summary of the project: The project involves the instrumentation of two mobile seismographic stations for the field study of the variation in characteristics of seismic noise and signals with geologic and geographic environment. The master and the slave stations capable of recording broadband earth noise and signals on magnetic tape are being employed in various regions of the United States to obtain data on short- and long-period earth noise, under various geologic and, topographic conditions along a profile. Routine data analysis of the recordings is being performed to determine power spectral density and coherency of background noise. Project title: Experimental Seismic Control Post Name of sponsoring Federal agency ARPA (via AFTAC). Name of organization: The Geotechnical Corp. Amount and duration of support: $218,939 (---). Date of contract: April 1, 1960. Contract expiration date: Continuing. Brief summary of the project: The design and establishment of an experimental seismic control post. Establish and equip a seismological station at the test facility, Fort Sill, Okla., according to technical specifications recommended for, Geneva-type seismic installation. The experimental station is being operated for an extended period of time and a continuing evaluation of the resulting seismometers data is to be conducted as necessary to determine optimum operating characteristics and procedures. In addition, the sites for four additional Geneve-type seismic stations are being selected in the United States under the guidance of general criterion for selecting station locations based on the specifications of the experimental station designed and established at Fort Sill. Project title: Systems Development Laboratory and Seismograph Station Name of sponsoring Federal agency: ARPA (via AFTAC). Name of organization: United Electro-Dynamics, Inc. Amount and duration of support: $238,663 Date of contract: September 15, 1960. Contract expiration date: Continuing. -). Brief summary of the project: Establishment of an experimental seismograph station and systems development laboratory. Phases I and II of this project were supported and have been completed. Work under phase I involves the design of the experimental seismological station and laboratory. Studies, including field investigations, have also been made leading to the recommendation for desirable sites for an experimental seismograph station and systems development laboratory. A description report and engineering designs for the station and associated laboratory have also been completed. Under phase II, the data processing requirements and requirements for a communication system have been studied and reported on. Project title: Experimental Seismic Control Post Network Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $2,700,000. Date of contract: June 1961. Contract expiration date: Indefinite at this time. Brief summary of the project: Following, in general, the specifications of the Geneva-type seismograph station in Oklahoma (WMSO) construct facilities and prepare instrumentation sites at each of four control post locations to form an experimental seismic control post network. The necessary instrumentation will be procured to meet specifications stated as requirements in the Geotechnical Corp. Technical Report No. 61-1. The equipment is to be installed at the control posts and properly calibrated. Personnel, operating supplies, transportation, and support will be provided as required to record continuously and to op erate the control posts for a period of 12 months. The available station facilities and data are to be made available to other participants in the VELA program. Project title: Deep Well Noise Improvement Properties of Typical Geological Structures Name of sponsoring Federal agency: ARPA (via AFTAC). Name of organization: United Electro-Dynamics, Inc. Amount and duration of support: $50,228 (8 months). Date of contract: March 8, 1961. Contract expiration date: November 15, 1961. Brief summary of the project: Computer programs suitable for solution of the following problems are being designed and tested: (a) The variations of phase velocity, group velocity, pressure and amplitude with depth of Rayleigh waves for complex layered structures at depths of up to 10,000 feet and in the period range of 0.2 to 5 seconds. (b) The variation of the amplitude of body waves with depth for complex layered structures. Using these computer programs, an evaluation will be made of the signal and noise behavior with depth and period for a variety of typical geological structures. Project title: Deep-well Modular Moving Coil Inertial Seismometer Name of sponsoring Federal agency: ARPA (via AFTAC). Name of organization: United Electro-Dynamics, Inc. Amount and duration of support: $140,000 (1 year). Date of contract: March 17, 1961. Contract expiration date: March 17, 1962. Brief summary of the project: Investigation is being conducted of the properties and characteristics, including advantages and disadvantages, of the deepwell moving coil inertial seismometer designs in modular form. Prototype instruments are to be designed and fabricated on the basis of the design study and laboratory tests which simulate field conditions expected are to be performed. A deep-well data cable is to be selected and tested on the basis of acceptable strength, insulation, and electrical characteristics necessary to retain the transducer signal response desired. On the basis of laboratory data collected and analyzed, recommendations are to be made concerning the application of deepwell instrumentation to the seismic system in reference to identifiable parameters based on theoretical, actual findings, and operational restrictions. Project title: Deep-well Variable Reluctance Seismometer Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $96,713 (1 year). Date of contract: May 5, 1961. Contract expiration date: May 5, 1962. Brief summary of the project: Studies on the expected properties and characteristics desired for deep-well inertial variable reluctance seismometer designs are being conducted. Prototype instruments based on specifications which result from the design study are to be constructed. On the basis of laboratory data collected and analyzed, recommendations are to be made concerning the application of this particular instrumentation to deep-well seismology. Project title: Particle Motion Study-Near Source Name of sponsoring Federal agency: ARPA (via DASA). Name or organization: Sandia Corp. Amount and duration of support: $514,000 (- -). Date of contract: November 1960. Contract expiration date: Continuing. Brief summary of the project: Particle motion study-near source. Free-field particle motion is to be observed along radii within rock extending from the immediate vicinity of zero point of an explosion-site out to the region of predominately linear (elastic) response of the rock. The performances of long-period displacement measuring techniques are to be evaluated after each explosive disturbance. Project title: Measurement of Close-In Earth Motion Name of sponsoring Federal agency: ARPA (via DASA). Contract expiration date: Continuing. By Brief summary of the project: Measurement of close-in earth motion. measurement of acceleration, particle velocity and displacement as functions of time, the strong transient motion of the formation produced by an underground nuclear shot would be determined at a number of vertical ranges above the shot and at a number of horizontal ranges near the surface. Results are to be compared with all available data from other underground explosions. Project title: Technical Photography of Surface Motion Name of sponsoring Federal agency: ARPA (via DASA). Date of contract: January 1, 1961. Contract expiration date: Continuing. Brief summary of the project: Technical photography of surface motion. The distant photography and the inertia weight station photography methods would be utilized to record the surface motion resulting from underground explosions. Project title: Strong Motion Seismic Measurements Name of sponsoring Federal agency: ARPA (via DASA). Contract expiration date: Continuing. Brief summary of the project: Strong motion seismic measurements of seismic signals generated by the Orchid event. The objective of this work is to determine attenuation with distance of the response spectrum intensity for the period range 0.1 to 2.5 seconds; to determine attenuation with distance of maximum accelerations and transient displacements. Results are to be compared with results from studies of previous underground detonations and natural earthquake phenomena for the purpose of improving empirical scale formulas. Project title: Permanent Displacement Survey Name of sponsoring Federal agency: ARPA (via DASA). Contract expiration date: Continuing. -). Brief summary of the project: A permanent displacement survey. The permanent displacement of locations along the shot tunnel due to a nuclear detonation would be measured. Approximately 12 stations along the tunnel wall of an explosion site will be located by first order survey pre and post shot to determine absolute displacement. Project title: Spectra of Strong Motion Reed Gage Name of sponsoring Federal agency: ARPA (via DASA). Date of contract: November 1960. Contract expiration date: Continuing. Brief summary of the project: Recording of spectra of a strong motion-reed gage. The frequency spectrum of the ground shock due to an underground detonation would be determined from data obtained with eight reed gages installed in the tunnel floor at the explosion site. Project title: Feasibility Study for Deep Telluric Measurements for LOLLIPOP. Name of sponsoring Federal agency : ARPA (via AFTAC). Name of organization: Hughes Aircraft Co. Amount and duration of support: $9,898 (1 month). Date of contract: June 10, 1960. Contract expiration date: June 30, 1960. Brief summary of the project: The objective of this study was to determine the feasibility of establishing a minimum of two deep telluric current measuring stations and to develop a plan for making measurements for the LOLLIPOP event. The station design was recommended which would aid in defining the characteristics of the electromagnetic signals derived from the underground detonation of nuclear devices. Project title: Electromagnetic Measurements -). Name of sponsoring Federal agency: ARPA (via AFTAC). · Brief summary of the project: Seven stations are being established and would be operated to determine quantitatively earth potentials, resistivity, and magnetic field intensity changes resulting from the Project ORCHID nuclear detonation. Background measurements would be made before and after each event at each of the sites and the data analyzed to determine the significance of electromagnetic measurements. Project title: Surface Electromagnetic Waves from LOLLIPOP Name of sponsoring Federal agency: ARPA (via AFTAC). Name of organization: Sandia Corp. Amount and duration of support: $43,300 Date of contract: October 7, 1960. Contract expiration date: Continuing. -). Brief summary of the project: Two stations are to be established and operated to record electromagnetic signals on orthogonal long wire antenna arrays during the project LOLLIPOP nuclear detonation. Background measurements are to be made before the event. Project title: Subsurface Electromagnetic from Underground Detonations Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $17,376 (- -). Date of contract: October 1, 1960. Contract expiration date: Continuing. Brief summary of the project: Two stations are to be established and operated to record electromagnetic signals during the next appropriate underground nuclear detonation. One station will be in a mine 1 mile from the detonation site and a second station will be in a similar location at a greater distance. Background measurements are to be made prior to the recorded event. Project title: Earth Currents from Underground Detonations Name of sponsoring Federal agency: ARPA (via AFTAC). Amount and duration of support: $38,941 Date of contract: October 20, 1960. Contract expiration date: Continuing. -). Brief summary of the project: Two stations are to be established (at 3 and 10 miles from the detonation point) and operated to record electromagnetic signals during the next appropriate underground nuclear detonation. Background measurements are to be made prior to the recorded event. Project title: LOLLIPOP Surface Motion Photography Name of sponsoring Federal agency: ARPA (via AFTAC). Name of organization: Sandia Corp. and Edgerton, Germeshausen, & Grier. Amount and duration of support: $42,000 (- -). Date of contract: October 7, 1960. Contract expiration date: Continuing. Brief summary of the project: The ground motion exhibited by an array of targets in the vicinity of surface zero of the site for the LOLLIPOP event is to be observed by photographic techniques. The relative motion, of inertial masses suspended on very long-period oscillator, systems at several locations in the vicinity of surface zero is also to be observed by photographic techniques. A complete analysis of the data is to be made to determine the ground motion in the vicinity of surface zero. Project title: Digital Recording and Analysis of Seismic Data during LOLLIPOP Name of sponsoring Federal agency: ARPA (via AFTAC). Name of organization: Texas Instruments, Inc. Amount and duration of support: $31,577 Date of contract: October 24, 1960. Contract expiration date: Continuing. -). |