| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| LB |
|
Leo Brady Network | 1994 | 2599 |
| LD |
|
Lamont-Doherty Cooperative Seismographic Network | 1970 | 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 |
|
Instituto Dom Luiz (IDL) - Faculdade de Ciencias Universidade de Lisboa | 2003 | 2599 |
| S |
|
Seismology at School Program, ETH Zurich | 2008 | 2599 |
| S1 |
|
Australian Seismometers in Schools | 2011 | 2599 |
| S8 |
|
SensorEra Seismic Network | 2023 | 2599 |
| SB |
|
UC Santa Barbara Engineering Seismology Network | 1989 | 2599 |
| SC |
|
New Mexico Tech Seismic Network | 1999 | 2599 |
| SE |
|
Southeastern Appalachian Cooperative Seismic Network | 1999 | 2599 |
| SF |
|
San Andreas Fault Observatory at Depth | 2002 | 2599 |
| SG |
|
International Geodynamics and Earth Tide Service | 1997 | 2599 |
| SH |
|
Shumagin-East Aleutian Network | 1981 | 1991 |
| SK |
|
Slovak National Seismic Network | 2002 | 2599 |
| SL |
|
Seismic Network of the Republic of Slovenia | 1990 | 2599 |
| SN |
|
Southern Great Basin Network | 1980 | 2599 |
| SP |
|
South Carolina Earth Physics Project | 2000 | 2004 |
| SR |
|
Seismic Research Observatory | 1974 | 1993 |
| SS |
|
SINGLE STATION | 1970 | 2599 |
| SV |
|
Servicio Nacional de Estudios Territoriales (SNET), El Salvador | 2004 | 2599 |
| SY |
|
Synthetic Seismograms | 1900 | 2599 |
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