| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| FA |
|
UCLA Seismic Network | 2003 | 2599 |
| FN |
|
Northern Finland Seismological Network | 1980 | 2599 |
| FO |
|
Seismic stations in France not belonging to the academic RESIF networks | 1900 | 2500 |
| FR |
|
|
1962 |
|
| 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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