# 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