| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| EB |
|
Ebre Observatory Seismic Network | 1980 | 2599 |
| EC |
|
Ecuador Seismic Network | 2002 | 2599 |
| EE |
|
Estonian Seismic Network | 1980 | 2599 |
| EG |
|
EUROSEISTEST Strong Motion Network (SDGEE_AUTH) | 1993 | 2599 |
| EI |
|
|
|
2599 |
| EM |
|
Electromagnetic Studies of the Continents | 1996 | 2599 |
| EN |
|
|
2007 |
|
| EO |
|
EON-ROSE | 2018 | 2599 |
| EP |
|
UTEP Seismic Network | 2009 | 2599 |
| ER |
|
Mount Erebus Volcano Observatory Seismic Network | 1981 | 2599 |
| ES |
|
Spanish Digital Seismic Network | 1980 | 2599 |
| ET |
|
CERI Southern Appalachian Seismic Network | 1982 | 2599 |
| EY |
|
Egyptian national seismological network | 1997 | 2599 |
| RA |
|
RESIF-RAP Accelerometric permanent network | 1995 | 2500 |
| RB |
|
|
2002 |
|
| RC |
|
BYU-Idaho Network | 2001 | 2599 |
| RD |
|
CEA/DASE broad-band permanent network | 1962 | 2500 |
| RE |
|
|
|
|
| RF |
|
Friuli Venezia Giulia Accelerometric Network, Italy | 1993 | 2599 |
| RI |
|
National Seismic Network of Argentina | 1972 | 2599 |
| RM |
|
Regional Integrated Multi-Hazard Early Warning System | 2008 | 2599 |
| RN |
|
RuhrNet - Ruhr-University Bochum, Germany | 1980 | 2599 |
| RO |
|
Romanian Seismic Network |
|
2599 |
| RS |
|
Regional Seismic Test Network | 1982 | 1986 |
| RV |
|
Regional Alberta Observatory for Earthquake Studies Network | 2013 | 2599 |
| RW |
|
Rwanda National Seismic Network | 2019 | 2599 |
| UD |
|
UD network | 1980 | 2599 |
| UF |
|
Centro de Investigación de Resiliencia y Riesgos Multi-Amenazas | 2022 | 2599 |
| UH |
|
UH Infrasound Network | 2004 | 2599 |
| UI |
|
North Idaho Seismic Network | 2004 | 2599 |
| UK |
|
UK Schools Seismic Network | 2005 | 2599 |
| UL |
|
USGS Low Frequency Geophysical Data Network | 1974 | 2999 |
| UM |
|
University of Montana Seismic Network | 2017 | 2599 |
| UO |
|
|
|
|
| UP |
|
Swedish National Seismic Network | 1980 | 2599 |
| US |
|
United States National Seismic Network |
|
|
| UU |
|
University of Utah Regional Seismic Network | 1962 | 2599 |
| UW |
|
|
|
|
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