U.S. Bureau of Reclamation, Denver
      Code: USBR
      
       Status: Network/Other

U.S. Department of Energy
      Code: DOE
      
       Status: Network/Other

U.S. National (broadband) Seismic Network, Golden
      Code: USNN
      
       Status: Network/Other

UNAM
      Code: UNM
       19.3290 -99.1780 2257.0
       Network: UNM
       Status: Open

US Air Force Technical Applications Center
      Code: USAF
      
       Status: Network/Other

USGS Alaska Seismic Project, Menlo Park
      Code: AGS
      
       Status: Network/Other

USGS Alaska Volcano Observatory
      Code: USAV
      
       Status: Network/Other

USGS Alaska Volcano Observatory
      Code: USAVO
      
       Status: Network/Other

USGS Digital Worldwide Standard Seismograph Net
      Code: DWSS
      
       Status: Network/Other

USGS Global Telemetered (broadband) Seismic Net
      Code: GTSN
      
       Status: Network/Other

USGS National Center for Earthquake Research
      Code: MNLO
      
       Status: Network/Other

USGS National Earthquake Information Service
      Code: NEIS
      
       Status: Network/Other

USGS National Telemetered Network, Golden
      Code: USTN
      
       Status: Network/Other

USGS Worldwide Standard Seismograph Network
      Code: WWSS
      
       Status: Network/Other

Uakit
      Code: UKT
       55.4889 113.6269 1140.0
       Network: BYKL
       Status: Open

Ubbergen
      Code: NE37
       51.8351 5.9050 30.0
       Network: NARS
       Status: Closed

Ubehebe Crater
      Code: UCN
      
       Status: Reserved

Uccle
      Code: UCC
       50.7983 4.3594 105.0
       Network: UCC
       Status: Open

Uchkent
      Code: UKTR
       43.1139 47.0806 120.0
       Network: DRS
       Status: Open

Uchtor
      Code: UCH
       42.2275 74.5134 3850.0
       Network: KYRG
       Status: Open

Uddeholm
      Code: UDD
       60.0900 13.6067 240.0
       Network: UPP
       Status: Open

Udhampur
      Code: UDP
       32.9017 75.0800 0.0
       Network: NDI
       Status: Open

Udine
      Code: UDN
       46.0631 13.2378 100.0
       Network: ROM
       Status: Closed

Udine OGS
      Code: UDI
       46.0650 13.2367 112.0
       Network: TRI
       Status: Open

Udu Point (Undu Point)
      Code: UDU
       -16.1521 -179.9880 170.0
       Network: SVA
       Status: Open

Ufa
      Code: UFA
       54.8000 56.0000 0.0
       Status: Reserved

Ufford
      Code: KUF
       52.6175 -0.3895 35.0
       Network: BGS
       Status: Open

Ugak Island
      Code: UGI
       57.3945 -152.2817 213.0
       Network: GIA
       Status: Closed

Ugakei
      Code: UGK
       35.0967 136.4729 290.0
       Network: NGY
       Status: Open

Ugashik Lake
      Code: UKL
       57.4017 -156.8550 410.0
       Network: GIA
       Status: Closed

Ugashik Lake
      Code: USL
       57.3983 -157.0300 500.0
       Network: GIA
       Status: Closed

Uglegorsk
      Code: UGL
       49.0780 142.0660 40.0
       Network: SKHL
       Status: Open

Uglegorsk (Esutoru)
      Code: ESU
       49.0833 142.0333 0.0
       Status: Closed

Uglovaya
      Code: UGLR
       53.2089 158.8239 1140.0
       Network: KRSC
       Status: Open

Ugurusu
      Code: URS
       33.5376 133.4886 25.0
       Network: URS
       Status: Open

Uinta Basin Array
      Code: UBO
       40.3217 -109.5687 1596.0
       Network: SLC
       Status: Closed

Uji
      Code: UJI
       34.8666 135.8269 290.0
       Network: KYT
       Status: Open

Ujungpandang (Makassar)
      Code: MKS
       -5.2178 119.4698 28.0
       Network: DJA
       Status: Open

Ukalunda
      Code: UKAQ
       -20.8976 147.1274 250.0
       Network: MEL
       Status: Open

Ukiah
      Code: UK-OR
       45.0931 -118.8986 1311.0
       Network: LRSM
       Status: Closed

Ukiah
      Code: UKI
       39.1372 -123.2106 199.0
       Network: NEIC
       Status: Open

Ulaanbaatar
      Code: ULN
       47.8652 107.0528 1615.0
       Network: OBM
       Status: Open

Ulaanbaatar (Ulan Bator)
      Code: OBM
       47.9200 106.9700 1330.0
       Network: OBM
       Status: Open

Ulaangom
      Code: ULG
       49.9600 92.0600 980.0
       Network: OBM
       Status: Open

Ulahol
      Code: ULHL
       42.2456 76.2417 2040.0
       Network: KYRG
       Status: Open

Ulamona
      Code: ULA
       -5.0064 151.2556 10.0
       Network: RAB
       Status: Closed

Ulamona
      Code: ULO
       -5.0590 151.3030 980.0
       Network: RAB
       Status: Open

Ulan Bator
      Code: OBM
       47.9200 106.9700 1330.0
       Network: OBM
       Status: Open

Ulba
      Code: ULBA
       -1.4493 -78.4077 2960.0
       Network: QUI
       Status: Open

Ulcinj
      Code: ULC
       41.9634 19.2497 465.0
       Network: PDG
       Status: Open

Uljin
      Code: KSULJ
       36.7021 129.4084 77.1
       Network: SEO
       Status: Open

Ulleungdo
      Code: KSULL
       37.4736 130.9008 218.3
       Network: SEO
       Status: Open

Ulsan
      Code: KSULS
       35.5543 129.3203 34.7
       Network: SEO
       Status: Open

Uludag
      Code: ULDT
       40.1422 29.1361 1734.0
       Network: DDA
       Status: Open

Ulyunkhan
      Code: YLYR
       54.8761 111.1617 560.0
       Network: BYKL
       Status: Open

Umaji
      Code: UMJ
       33.5462 134.0470 320.0
       Network: URS
       Status: Open

Umak
      Code: AD2
       51.9033 -176.0183 381.0
       Network: BOU
       Status: Closed

Umberatana
      Code: UMB
       -30.2400 139.1281 610.0
       Network: ADE
       Status: Closed

Umeå
      Code: UMAU
       63.8829 20.6779 20.0
       Network: UPP
       Status: Open

Umeå
      Code: UME
       63.8150 20.2367 16.0
       Network: UPP
       Status: Closed

Umejima
      Code: UMJE
       35.1928 138.4979 250.0
       Network: ERIJ
       Status: Reserved

Umm Lajj
      Code: UMJS
       25.2340 37.3119 130.0
       Network: SNSN
       Status: Open

Umm Shaghir
      Code: ASHG
       23.2600 31.6600 200.0
       Network: HLW
       Status: Open

Umm ar Rimam
      Code: UMR
       29.5519 47.7158 82.0
       Network: KISR
       Status: Open

Umm ar Ruwaysat
      Code: RST
       29.5003 46.9972 218.0
       Network: KISR
       Status: Open

Umtali
      Code: MUZ
       -18.9950 32.6267 0.0
       Network: BUL
       Status: Reserved

Umtata
      Code: UMT
       -31.5833 28.7550 800.0
       Network: PRE
       Status: Closed

Unac-Piva
      Code: UPM
       43.2029 18.9100 1721.0
       Network: PDG
       Status: Open

Unalakleet
      Code: UNL
       63.8933 -160.6867 91.0
       Network: GIA
       Status: Closed

Unalaska
      Code: UNA
       53.8733 -166.5333 0.0
       Network: USGS
       Status: Closed

Unalaska Valley
      Code: UNV
       53.8465 -166.5020 67.0
       Network: GIA
       Status: Open

Uncukul
      Code: UNCR
       42.7139 46.7944 650.0
       Network: DRS
       Status: Open

Undu Point
      Code: UDU
       -16.1521 -179.9880 170.0
       Network: SVA
       Status: Open

Unión Juárez
      Code: MUX
       15.0790 -92.0740 0.0
       Network: UNM
       Status: Closed

Union Grove
      Code: UGRT
       35.6109 -84.1170 302.0
       Status: Open

Union Valley
      Code: UYO
       34.1667 -94.4588 231.0
       Network: TUL
       Status: Open

Unionville
      Code: UVN
       40.4423 -118.1583 1926.0
       Network: REN
       Status: Closed

Unionville
      Code: UVN1
       40.4500 -118.1500 1870.0
       Network: REN
       Status: Closed

Univ. de Barcelona i Institut d'Estudis Catalans
      Code: UBIC
      
       Status: Network/Other

Univ. of Utah Research Institute, Salt Lake City
      Code: SLCI
      
       Status: Network/Other

Universidad Nacional Autónoma de México
      Code: UNAM
      
       Status: Network/Other

Universidad Nacional Autónoma de México (UNAM)
      Code: UNM
       19.3290 -99.1780 2257.0
       Network: UNM
       Status: Open

Universidad Nacional Autonoma de Honduras
      Code: UNAH
       14.0750 -87.1750 1020.0
       Network: UNAH
       Status: Open

Universidad de Concepcion, Chile
      Code: UDEC
      
       Status: Network/Other

Universidad de Costa Rica, San Jose
      Code: UCR
      
       Status: Network/Other

Universidad de Guanajuato
      Code: UGO
       21.0170 -101.2555 0.0
       Network: UNM
       Status: Reserved

Universidad de Oriente, Cumaná
      Code: UDO
      
       Status: Network/Other

Universidad de Panamá
      Code: UPA
       8.9810 -79.5338 41.4
       Network: UPA
       Status: Open

Universidad de Panamá en Metetí, Darién
      Code: UPD1
       8.5487 -78.0135 74.0
       Network: UPA
       Status: Open

Universidad de los Andes (Mérida)
      Code: UAV
       8.6100 -71.1447 1600.0
       Network: UAV
       Status: Open

Universidad del Valle, Cali
      Code: UVC
      
       Status: Network/Other

University of Arizona
      Code: UOA
       32.2331 -110.9528 741.0
       Status: Closed

University of Arkansas, Little Rock
      Code: UALR
       34.7753 -92.3436 138.0
       Network: SLM
       Status: Open

University of British Columbia
      Code: UBC
      
       Status: Network/Other

University of California Stadium
      Code: CMSB
       37.8719 -122.2517 -72.9
       Network: BRK
       Status: Open

University of California, Santa Cruz
      Code: JUCM
       37.0012 -122.0485 177.0
       Network: MNLO
       Status: Open

University of Cincinnati
      Code: UOCO
       39.1400 -84.5220 226.0
       Network: OGSO
       Status: Reserved

University of Connecticut (Storrs)
      Code: UCT
       41.8317 -72.2506 149.0
       Network: WES
       Status: Closed

University of Connecticut, Storrs
      Code: UCCT
       41.7943 -72.2255 223.0
       Status: Open

University of Dar es Salaam, Tanzania
      Code: TZN
      
       Status: Network/Other

University of Florida
      Code: GAI
       29.6458 -82.3394 50.0
       Status: Open

University of Jordan, Amman
      Code: UNJ
       32.0158 35.8708 1050.0
       Status: Open

University of Leeds, Yorkshire, UK
      Code: ULE
      
       Status: Network/Other

University of Michigan
      Code: AAMC
       42.2780 -83.7360 250.0
       Network: AAM
       Status: Open

University of New Brunswick (Fredericton)
      Code: UNB
       45.7795 -66.6442 64.0
       Network: OTTR
       Status: Open

University of Puget Sound
      Code: UPS
       47.2639 -122.4836 113.0
       Network: SEA
       Status: Open

University of Richmond
      Code: URVA
       37.5709 -77.5357 49.0
       Network: BLA
       Status: Open

University of Southern California
      Code: USC
       34.0192 -118.2860 17.0
       Network: USC
       Status: Open

University of Southern Indiana
      Code: USIN
       37.9651 -87.6660 170.7
       Network: SLM
       Status: Open

University of Tennessee at Martin
      Code: UTM
       36.2900 -88.9410 108.0
       Status: Closed

University of Tennessee at Martin
      Code: UTMA
       36.2930 -88.9760 108.0
       Status: Open

University of Tennessee at Martin
      Code: UTMT
       36.3423 -88.8642 120.0
       Network: SLM
       Status: Open

University of Toledo
      Code: UTLO
       41.6590 -83.6180 178.0
       Network: OGSO
       Status: Reserved

University of Toledo
      Code: UTO
       41.6619 -83.5743 179.0
       Network: OGSO
       Status: Open

University of Utah Yellowstone network
      Code: SLCY
      
       Status: Network/Other

University of Western Ontario
      Code: UWOO
       43.0110 -81.2724 248.0
       Network: POLR
       Status: Closed

University of Wisconsin at Milwaukee
      Code: UWM
       43.0795 -87.8784 204.0
       Status: Open

Unterbreizbach
      Code: UBBA
       50.8188 10.0010 -526.4
       Network: BGRD
       Status: Open

Unuar
      Code: UZH
       48.6310 22.2930 160.0
       Network: LVV
       Status: Open

Unzendake
      Code: UNZ
       32.7400 130.2650 678.0
       Network: JMA
       Status: Open

Uoyan
      Code: YOA
       56.1328 111.7239 500.0
       Network: BYKL
       Status: Open

Upernavik
      Code: UPNG
       72.7848 -56.1408 110.0
       Network: OTT
       Status: Open

Upington
      Code: UPI
       -28.3619 21.2527 845.0
       Network: PRE
       Status: Open

Upper Santa Misericordia
      Code: UMS
       13.2480 123.7320 330.0
       Network: PIVS
       Status: Open

Uppsala
      Code: UPP
       59.8583 17.6267 14.0
       Network: UPP
       Status: Open

Ura
      Code: KV91
       32.0131 130.8031 308.0
       Network: ERIJ
       Status: Reserved

Ura-Tyube
      Code: URT
       39.9167 69.0167 0.0
       Network: TAJK
       Status: Open

Urahoro
      Code: URH
       42.9270 143.6744 120.0
       Network: HSS
       Status: Open

Urakawa
      Code: URA
       42.1583 142.7800 30.0
       Network: JMA
       Status: Open

Urakawa 2
      Code: URAJ
       42.2247 142.7050 40.0
       Network: JMA
       Status: Open

Urakawa 3
      Code: URA3
       42.2428 142.6672 30.0
       Network: JMA
       Status: Open

Urakawa-nobuka
      Code: JNBK
       42.2800 142.7527 115.0
       Network: JMA
       Status: Open

Urasca
      Code: URSC
       9.8350 -83.7782 1500.0
       Network: UCR
       Status: Open

Ureshino
      Code: JUR
       33.0932 129.9490 160.0
       Network: JMA
       Status: Open

Urewera
      Code: URZ
       -38.2603 177.1103 100.0
       Network: WEL
       Status: Open

Urfa
      Code: URFA
       37.4410 38.8213 938.0
       Network: ISK
       Status: Open

Urgal
      Code: URG
       51.0986 132.3639 0.0
       Network: RMOD
       Status: Reserved

Urkarakh
      Code: URKR
       42.1656 47.6333 1300.0
       Network: DRS
       Status: Open

Uroteppa (Ura-Tyube)
      Code: URT
       39.9167 69.0167 0.0
       Network: TAJK
       Status: Open

Urumqi (Wulumuchi)
      Code: WMQ
       43.8211 87.6950 897.0
       Network: BJI
       Status: Open

Ushuaia
      Code: UHA
      
       Network: SJA
       Status: Reserved

Ushuaia
      Code: USHA
       -54.8320 -68.4343 107.0
       Network: SJA
       Status: Open

Ushuaia
      Code: USHU
       -54.8433 -68.5569 12.0
       Status: Reserved

Uspallata
      Code: AUSP
       -32.2236 -69.3873 2502.0
       Network: SJA
       Status: Reserved

Uspenovka
      Code: USP
       43.2669 74.4997 740.0
       Network: KYRG
       Status: Open

Ussuriysk Array
      Code: USRK
       44.2000 132.0000 0.0
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site A0
      Code: USA0
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site A1
      Code: USA1
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site A2
      Code: USA2
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site A3
      Code: USA3
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site B1
      Code: USB1
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site B2
      Code: USB2
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site B3
      Code: USB3
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site B4
      Code: USB4
      
       Network: RIPT
       Status: Reserved

Ussuriysk Array Site B5
      Code: USB5
      
       Network: RIPT
       Status: Reserved

Ussuryisk
      Code: USK
       44.2833 132.0831 0.0
       Network: RIPT
       Status: Open

Ust'-Elegest
      Code: UER
       51.5630 94.0870 660.0
       Network: ASRS
       Status: Closed

Ust'-Kan
      Code: UKR
       50.9370 84.7730 1100.0
       Network: ASRS
       Status: Open

Ust'-Maya
      Code: USMR
       60.4200 134.5400 170.0
       Network: YARS
       Status: Open

Ust'-Nera
      Code: UNR
       64.5700 143.2283 485.0
       Network: YARS
       Status: Open

Ust'-Nyukzha
      Code: USZ
       56.5617 121.5917 415.0
       Network: YARS
       Status: Open

Ust'-Omchug
      Code: USO
       61.1500 149.6333 0.0
       Network: NERS
       Status: Closed

Ustav fyziky Zeme, Masaryk University, Brno
      Code: IPEC
      
       Status: Network/Other

Ustica
      Code: USI
       38.7079 13.1791 285.0
       Network: ROM
       Status: Open

Usu Kazan Kan
      Code: UVO
       42.5569 140.8457 143.0
       Network: HSS
       Status: Open

Usuki
      Code: JUS
       33.0657 131.7507 140.0
       Network: JMA
       Status: Open

Utah State Capitol
      Code: CAPU
       40.7785 -111.8900 1384.0
       Network: SLC
       Status: Open

Utowana Lake
      Code: UWL
       43.8378 -74.5433 561.0
       Network: PAL
       Status: Closed

Utrecht
      Code: NE05
       52.0880 5.1720 2.0
       Network: NARS
       Status: Closed

Utsunomiya
      Code: UTSU
       36.5470 139.9171 110.0
       Network: UTSU
       Status: Open

Utsunomiya (Utunomiya)
      Code: UTS
       36.5433 139.8717 120.0
       Network: JMA
       Status: Open

Utuhina
      Code: UTU
       -38.1775 176.1922 410.0
       Network: WELR
       Status: Open

Utunomiya
      Code: UTS
       36.5433 139.8717 120.0
       Network: JMA
       Status: Open

Uvira
      Code: UVI
       -3.4000 29.1167 950.0
       Network: LWI
       Status: Open

Uwajima (Uwazima)
      Code: UWA
       33.2250 132.5583 43.0
       Network: JMA
       Status: Open

Uwajima 2 (Hiromi)
      Code: UWA2
       33.2137 132.6245 450.0
       Network: JMA
       Status: Open

Uwazima
      Code: UWA
       33.2250 132.5583 43.0
       Network: JMA
       Status: Open

Uwekahuna
      Code: UWE
       19.4233 -155.2933 1240.0
       Network: HVO
       Status: Open

Uzhgorod
      Code: UZH
       48.6310 22.2930 160.0
       Network: LVV
       Status: Open

Uzhhorod (Uzhgorod, Unuar)
      Code: UZH
       48.6310 22.2930 160.0
       Network: LVV
       Status: Open

Uzuto
      Code: UZT
       34.5817 133.1427 230.0
       Network: ERIJ
       Status: Closed