- model: networks.network pk: 375 fields: fdsn_code: UA name: Caribbean Andesite Lava Island Precision Seismo-geodetic Observatory website: '' operator: 435 doi: '' deployment_region: Montserrat - model: networks.network pk: 1417 fields: fdsn_code: UB name: University of Zimbabwe 1 website: '' operator: 1223 doi: 10.7914/SN/UB deployment_region: '' - model: networks.network pk: 190 fields: fdsn_code: UC name: Colima Seismic Network website: http://www.ucol.mx/volcan/monitoreo.php operator: 320 doi: '' deployment_region: '' - model: networks.network pk: 1595 fields: fdsn_code: UD name: Seismic Network Main Center of Special Monitoring website: '' operator: 1260 doi: 10.7914/SN/UD deployment_region: UA - model: networks.network pk: 849 fields: fdsn_code: UE name: Seismological Network of United Arab Emirates website: '' operator: 903 doi: '' deployment_region: '' - model: networks.network pk: 2051 fields: fdsn_code: UF name: Centro de Investigación de Resiliencia y Riesgos Multi-Amenazas website: '' operator: null doi: 10.7914/SN/UF deployment_region: DO - model: networks.network pk: 191 fields: fdsn_code: UG name: Unocal Geothermal Northern California Network website: http://www.ncedc.org/geysers/ operator: 321 doi: '' deployment_region: '' - model: networks.network pk: 855 fields: fdsn_code: UH name: UH Infrasound Network website: http://www.isla.hawaii.edu/ operator: 64 doi: '' deployment_region: '' - model: networks.network pk: 301 fields: fdsn_code: UI name: North Idaho Seismic Network website: '' operator: 390 doi: '' deployment_region: '' - model: networks.network pk: 394 fields: fdsn_code: UK name: UK Schools Seismic Network website: http://www.le.ac.uk/seis-uk/school_resources.html operator: 187 doi: '' deployment_region: '' - model: networks.network pk: 192 fields: fdsn_code: UL name: USGS Low Frequency Geophysical Data Network website: http://quake.geo.berkeley.edu/ul/ul.overview.html operator: 255 doi: '' deployment_region: '' - model: networks.network pk: 1470 fields: fdsn_code: UM name: University of Montana Seismic Network website: '' operator: 90 doi: 10.7914/SN/UM deployment_region: '' - model: networks.network pk: 1356 fields: fdsn_code: UN name: Uganda National Seismological Network website: '' operator: 1201 doi: 10.7914/SN/UN deployment_region: '' - model: networks.network pk: 193 fields: fdsn_code: UO name: Pacific Northwest Seismic Network - University of Oregon website: https://pnsn.org operator: 1683 doi: 10.7914/SN/UO deployment_region: US - model: networks.network pk: 194 fields: fdsn_code: UP name: Swedish National Seismic Network website: https://www.snsn.se/ operator: 161 doi: 10.18159/SNSN deployment_region: SE - model: networks.network pk: 2321 fields: fdsn_code: UQ name: UNSA Regional Seismic Network website: '' operator: null doi: 10.7914/d4yq-xt83 deployment_region: PE - model: networks.network pk: 1141 fields: fdsn_code: UR name: UKArray website: '' operator: 127 doi: 10.7914/SN/UR deployment_region: GB - model: networks.network pk: 34 fields: fdsn_code: US name: United States National Seismic Network website: '' operator: 301 doi: 10.7914/SN/US deployment_region: US - model: networks.network pk: 2307 fields: fdsn_code: UT name: Ukrainian National Seismic Network website: '' operator: null doi: '' deployment_region: UA - model: networks.network pk: 131 fields: fdsn_code: UU name: University of Utah Regional Seismic Network website: http://www.seis.utah.edu/ operator: 1620 doi: 10.7914/SN/UU deployment_region: '' - model: networks.network pk: 1744 fields: fdsn_code: UV name: 'Red Sismológica del Suroccidente Colombiano ' website: http://osso.univalle.edu.co operator: null doi: 10.7914/SN/UV deployment_region: CO - model: networks.network pk: 48 fields: fdsn_code: UW name: Pacific Northwest Seismic Network - University of Washington website: http://www.pnsn.org/ operator: 1657 doi: 10.7914/SN/UW deployment_region: '' - model: networks.network pk: 2395 fields: fdsn_code: UX name: Red Sismologica del Nororiente Colombiano website: '' operator: null doi: 10.7914/7efz-gx67 deployment_region: CO - model: networks.network pk: 997 fields: fdsn_code: UY name: Observatorio Geofisico del Uruguay website: http://ogu.fcien.edu.uy operator: 1116 doi: 10.7914/SN/UY deployment_region: UY - model: networks.network pk: 477 fields: fdsn_code: UZ name: Uzbekistan Digital Seismic Network website: http://www.smrm.uz operator: null doi: UZ deployment_region: UZ