Acronyms, etc. Acronym Definition ACZ Antarctic Convergence Zone ADC analog-to-digital converter AFRL Air Force Research Laboratory AFTAC Air Force Technical Applications Center AK135 seismic travel time model ANFO ammonium nitrate fuel oil ANSS Advanced National Seismic System ARSA Automated Radioxenon Sampler/Analyzer BAA Broad Agency Announcement BEM boundary element method CC correlation coefficient CDSN Chinese Digital Seismic Network CLVD compensated linear vector dipole CMT Harvard centroid moment tensor CNDSN Chinese National Digital Seismic Network COTS commercial off the shelf CRUST2.0 crustal model (Bassin et al., 2000) CSS Center for Seismic Studies data format CTBT Comprehensive Nuclear-Test-Ban Treaty CTBTO Comprehensive Nuclear-Test-Ban Treaty Organization CUB2.0 3D global models (Shapiro et al., 2002) CU-Boulder University of Colorado, Boulder DC double couple DD double difference DMC Data Management Center (IRIS) DOB depth of burial DoD Department of Defense DOE Department of Energy DOF degrees of freedom DOS Department of State DSS deep seismic sounding ECM Event Classification Matrix EDR Earthquake Data Reports - a USGS publication EFT earth-flattening transform EGF Empirical Green Function EHB Engdahl, E.R., van der Hilst, R. & Buland, R., 1998. Global teleseismic earthquake relocation with improved travel times and procedures for depth determination, Bull. Seismol. Soc. Am. 88, 722-743 ENS Earthquake Notification Service (from USGS) ETOPO earth topographic (database) ETOPO5 terrain model EventID tool to implement event discrimination (Hartse et al., 1997; Walter et al., 1999) FD finite difference FE finite element FFT Fast Fourier Transform F-K frequency wavenumber FSU Former Soviet Union FWHM full width at half maximum G2S ground-to-space GB Gaussian beam GBF generalized beamforming GII Geophysical Institute of Israel GIS geographical information system GMEL Grid-search Multiple Event Location GMT generic mapping tool GNEMRD Ground-Based Nuclear Explosion Monitoring Research and Development Program GRACE gravity recovery and climate experiment GSN global seismographic network GT ground truth GTx ground truth information of accuracy x km HE high explosive HPGe high purity germanium HPXe high-pressure xenon Hz hertz IASPEI International Association of Seismology and Physics of the Earth's Interior iasp91 standard earth model IPGG Institute of Petroleum Geology and Geophysics IDA International Deployment of Accelerometers IDC International Data Centre IDG Russian Institute for the Dynamics of the Geospheres IIEES International Institute of Earthquake Engineering and Seismology IMS International Monitoring System InSAR Interferometric Synthetic Aperture Radar IRIS Incorporated Research Institutions for Seismology ISC International Seismological Centre ISTC International Science and Technology Center JVE Soviet Joint Verification Experiment KB Knowledge Base KBCIT Knowledge Base Calibration Integration Tool KMA Korean Meteorological Administration KNDC Kazakhstan National Data Center LANL Los Alamos National Laboratory LDEO Lamont-Doherty Earth Observatory LLNL Lawrence Livermore National Laboratory LNM low-noise model LVZ low velocity zones MatSeis seismic analysis package developed by SNL using Matlab mb body wave magnitude MDAC magnitude and distance amplitude corrections MEMS microelectromechanical systems MIT Massachusetts Institute of Technology Ms surface wave magnitude MSE mean squared error MSU Michigan State University Mw moment magnitude NA-22 Office of Nonproliferation Research and Development NASA National Aeronautics and Space Administration NEIC National Earthquake Information Center NEM R&D Nuclear Explosion Monitoring Research and Development NEMS nuclear explosion monitoring system NISN North Iraq Seismographic Network Nm newton-meters NNSA National Nuclear Security Administration NORSAR Norwegian Seismic Array NPE Nonproliferation Experiment NRL Naval Research Laboratory NSF National Science Foundation NTS Nevada Test Site ORFEUS Observatories and Research Facilities for European Seismology PASSCAL Program for the Array Seismic Studies of the Continental Lithosphere PDE preliminary determination of epicenters PE parabolic equation PNE peaceful nuclear explosions PNNL Pacific Northwest National Laboratory PPV peak particle velocity PSD power spectral density PSU Penn State University Q Seismic Q factor (reciprocal of attenuation) RASA Radionuclide Aerosol Sampler Analyzer REB Reviewed Event Bulletin - an IDC report RESP SEED response files RF receiver functions RMS root mean square (errors) ROC receiver operating characteristic RSTT Regional Seismic Travel-Time model SAC seismic analysis code SAIC Science Applications International Corporation SBIR Small Business Innovation Research SCEC Southern California Earthquake Center SCSN Southern California Seismic Network SEED Standard for the Exchange of Earthquake Date SEM spectral element method SLBM Seismic Location Baseline Model SLU ST. Louis University SMDC Space Missile Defense Command (Army) SMU Southern Methodist University SNL Sandia National Laboratories SNR signal-to-noise ratio SOFAR Channel SOund Fixing And Ranging - primary sound channel in the ocean SPE source phenomenology experiments STA/LTA short-term average/long-term average STS Semipalatinsk Test Site SUS signal underwater sound t* (t-star) A measure of the "damping" or attenuation along a path. t* is the ratio of the travel time along a ray path to the average Q (seismic "quality" factor) along it. TOD time of day T-phase hydroacoustic phase UCSD University of California, San Diego UHV ultra-high vacuum UNE underground nuclear explosions USAEDS United States Atomic Energy Detection System USBM United States Bureau of Mines USGS United States Geological Survey USNDC United States National Data Center VOD velocity of detonation WWSSN World Wide Standardized Seismographic Network YSKP Yellow Sea and Korean Peninsula