| 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 |
| PA |
|
ChiriNet | 2000 | 2599 |
| PB |
|
Plate Boundary Observatory Borehole Seismic Network | 2004 | 2599 |
| PE |
|
Pennsylvania State Seismic Network | 2004 | 2599 |
| PF |
|
Piton de la Fournaise Volcano Observatory Network (Reunion Island) | 1980 | 2599 |
| PI |
|
PASSCAL Pier Test Data | 2006 | 2599 |
| PL |
|
Polish Seismological Network | 1990 | 2599 |
| PM |
|
Portuguese National Seismic Network | 2006 | 2599 |
| PN |
|
PEPP-Indiana | 1998 | 2599 |
| PO |
|
Portable Observatories for Lithospheric Analysis and Research Investigating Seismicity | 2000 | 2599 |
| PP |
|
Princeton Earth Physics Program | 1999 | 2599 |
| PQ |
|
Public Safety Geoscience Program Canadian Research Network | 2013 | 2599 |
| PR |
|
Puerto Rico Seismic Network & Puerto Rico Strong Motion Program | 1986 | 2599 |
| PS |
|
Pacific21 | 1989 | 2599 |
| PT |
|
Pacific Tsunami Warning Seismic System | 1965 | 2599 |
| PY |
|
Piñon Flats Observatory Array | 2014 | 2599 |
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