| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| EC |
|
Ecuador Seismic Network | 2002 | 2599 |
| EI |
|
Irish National Seismic Network | 1993 | 2599 |
| EM |
|
Electromagnetic Studies of the Continents | 1996 | 2599 |
| EN |
|
CalEnergy Subnetwork | 2007 | 2599 |
| EO |
|
EON-ROSE | 2018 | 2599 |
| EP |
|
UTEP Seismic Network | 2009 | 2599 |
| ER |
|
Mount Erebus Volcano Observatory Seismic Network | 1981 | 2599 |
| ET |
|
CERI Southern Appalachian Seismic Network | 1982 | 2599 |
| EY |
|
Egyptian national seismological network | 1997 | 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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