| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| G |
|
GEOSCOPE - French Global Network of Seismological Broadband Stations | 1982 | 2599 |
| GB |
|
Great Britain Seismograph Network | 1970 | 2599 |
| GD |
|
Global Positioning System (GPS) Displacement Measurements | 1976 | 2599 |
| GE |
|
GEOFON | 1991 | 2599 |
| GF |
|
GONAF | 2006 | 2599 |
| GG |
|
Greenland Ice Sheet Monitoring Network | 2012 | 2599 |
| GH |
|
Ghana Digital Seismic Network | 2010 | 2599 |
| GI |
|
Red Sismologica Nacional- Guatemala | 2001 | 2599 |
| GL |
|
Guadeloupe Seismic and Volcano Observatory Network | 1950 | 2599 |
| GM |
|
U.S. Geological Survey Networks | 2016 | 2599 |
| GO |
|
National Seismic Network of Georgia | 1988 | 2599 |
| GR |
|
German Regional Seismic Network | 1976 | 2599 |
| GS |
|
US Geological Survey Networks | 1980 | 2599 |
| GT |
|
Global Telemetered Seismograph Network (USAF/USGS) | 1993 | 2599 |
| GY |
|
Geyokcha Array, Turkmenistan | 1993 | 1994 |
| T3 |
|
Rete Accelerometrica Terna | 2019 | 2599 |
| TA |
|
USArray Transportable Array | 2003 | 2599 |
| TC |
|
Red Sismológica Nacional de Costa Rica | 1973 | 2599 |
| TD |
|
TransAlta Monitoring Network | 2013 | 2599 |
| TF |
|
Tajikistan National Seismic Network | 2022 | 2599 |
| TJ |
|
Tajikistan National Seismic Network | 2005 | 2599 |
| TM |
|
Thai Seismic Monitoring Network | 2008 | 2599 |
| TO |
|
Tectonic Observatory - MASE, VEOX , PeruSE, CCSE | 2004 | 2599 |
| TP |
|
Rete di monitoraggio microsismico installata presso la concessione Gorgoglione | 2018 | 2599 |
| TR |
|
Eastern Caribbean Seismograph Network | 1965 | 2599 |
| TT |
|
Seismic Network of Tunisia | 2008 | 2599 |
| TW |
|
Broadband Array in Taiwan for Seismology | 1994 | 2599 |
| TX |
|
Texas Seismological Network | 2016 | 2599 |
| TZ |
|
Ol Doinyo Lengai, TZ Volcano Monitoring | 2017 | 2599 |
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