| 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 |
| IA |
|
BMG-Net, Indonesia (IA-Net) | 1980 | 2599 |
| IB |
|
IberArray | 2007 | 2014 |
| IC |
|
New China Digital Seismograph Network | 1992 | 2599 |
| ID |
|
Project IDA VLP Seismometer Network - UCSD/SIO/IGPP | 1975 | 1995 |
| IE |
|
INL Seismic Monitoring Program | 1972 | 2599 |
| II |
|
Global Seismograph Network - IRIS/IDA | 1986 | 2599 |
| IJ |
|
Istanbul University Seismic Network | 2013 | 2599 |
| IL |
|
Iranian Long Period Array | 1966 | 1979 |
| IM |
|
International Miscellaneous Stations | 1965 | 2599 |
| IN |
|
National Seismic Network of India | 2000 | 2599 |
| IO |
|
|
|
2599 |
| IP |
|
|
|
2599 |
| IQ |
|
Plate Boundary Project Iquique, GFZ Potsdam, Germany | 1980 | 2599 |
| IS |
|
Israelian Broadband Seismological Network (GII-Net) | 1980 | 2599 |
| IU |
|
|
|
2599 |
| IV |
|
|
1988 | 2599 |
| IW |
|
Intermountain West Seismic Network | 2003 | 2599 |
| IX |
|
Irpinia Seismic Network, Italy | 2005 | 2599 |
| IY |
|
Rete Universita Calabria | 2021 | 2599 |
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