# Network Code Network Name Network Operator Network Country (ISO & Name) Network Website Deployment Country (if different) Digital Object Identifier (DOI) UA Caribbean Andesite Lava Island Precision Seismo-geodetic Observatory University of Arkansas - Fayetteville United States of America Montserrat UB University of Zimbabwe 1 University of Zimbabwe Zimbabwe Zimbabwe 10.7914/SN/UB UC Colima Seismic Network Universidad de Colima Mexico http://www.ucol.mx/volcan/monitoreo.php Mexico UD Seismic Network Main Center of Special Monitoring Main Center of Special Monitoring Ukraine Ukraine 10.7914/SN/UD UE Seismological Network of United Arab Emirates National Center of Meteorology and Seismology United Arab Emirates United Arab Emirates UF Centro de Investigación de Resiliencia y Riesgos Multi-Amenazas Pontificia Universidad Católica Madre y Maestra Dominican Republic Dominican Republic 10.7914/SN/UF UG Unocal Geothermal Northern California Network Unocal Corporation United States of America http://www.ncedc.org/geysers/ United States of America UH UH Infrasound Network University of Hawaii United States of America http://www.isla.hawaii.edu/ United States of America UI North Idaho Seismic Network University of Idaho United States of America United States of America UK UK Schools Seismic Network University of Leicester United Kingdom http://www.le.ac.uk/seis-uk/school_resources.html United Kingdom UL USGS Low Frequency Geophysical Data Network USGS Menlo Park United States of America http://quake.geo.berkeley.edu/ul/ul.overview.html United States of America UM University of Montana Seismic Network University Of Montana United States of America United States of America 10.7914/SN/UM UN Uganda National Seismological Network Directorate of Geological Survey and Mines, Uganda Uganda Uganda 10.7914/SN/UN UO Pacific Northwest Seismic Network - University of Oregon University of Oregon United States of America https://pnsn.org United States of America 10.7914/SN/UO UP Swedish National Seismic Network Uppsala University Sweden https://www.snsn.se/ Sweden 10.18159/SNSN UQ UNSA Regional Seismic Network Universidad Nacional de San Agustín de Arequipa - UNSA Peru 10.7914/d4yq-xt83 UR UKArray British Geological Survey United Kingdom United Kingdom 10.7914/SN/UR US United States National Seismic Network Albuquerque Seismological Laboratory/USGS United States of America United States of America 10.7914/SN/US UT Ukrainian National Seismic Network Ukraine UU University of Utah Regional Seismic Network University of Utah United States of America http://www.seis.utah.edu/ United States of America 10.7914/SN/UU UV Red Sismológica del Suroccidente Colombiano University of Valle Colombia http://osso.univalle.edu.co Colombia 10.7914/SN/UV UW Pacific Northwest Seismic Network - University of Washington University of Washington United States of America http://www.pnsn.org/ United States of America 10.7914/SN/UW UX Red Sismologica del Nororiente Colombiano Industrial University of Santander Colombia Colombia 10.7914/7efz-gx67 UY Observatorio Geofisico del Uruguay Universidad de la Republica Uruguay http://ogu.fcien.edu.uy Uruguay 10.7914/SN/UY UZ Uzbekistan Digital Seismic Network Republican Center Seismic and Forecasting Monitoring Uzbekistan Uzbekistan http://www.smrm.uz Uzbekistan UZ