| 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 |
| LA |
|
Los Angeles Basin Seismic Network | 1988 | 2999 |
| LB |
|
Leo Brady Network | 1994 |
|
| LC |
|
LSC (Laboratorio Subterraneo de Canfranc) | 1980 | 2599 |
| LD |
|
Lamont-Doherty Cooperative Seismographic Network | 1970 | 2599 |
| LE |
|
LE | 1980 | 2599 |
| LH |
|
Large High-Performance Outdoor Shake Table | 2023 | 2599 |
| LI |
|
Laser Interferometer Gravitational-Wave Experiment | 2000 | 2599 |
| LM |
|
Michigan State University Seismic Network | 2016 | 2599 |
| LO |
|
Observatorio Sismológico Politécnico Loyola | 2012 | 2599 |
| LX |
|
|
|
2599 |
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