| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| B6 |
|
Bransfield Strait Seismic Network | 2008 | 2599 |
| BC |
|
Red Sísmica del Noroeste de México | 1980 | 2599 |
| BE |
|
Belgian Seismic Network | 1985 | 2599 |
| BF |
|
Black Forest Observatory | 1979 | 1995 |
| BI |
|
University of Dhaka Seismographic Network | 2008 | 2599 |
| BK |
|
Berkeley Digital Seismograph Network | 1980 | 2599 |
| BL |
|
Brazilian Lithospheric Seismic Project | 1988 | 2599 |
| BN |
|
UK-Net, Blacknest Array | 1960 | 2599 |
| BV |
|
Bolvian Seismic Network | 1913 | 2599 |
| BX |
|
Botswana Seismological Network | 2001 | 2599 |
| 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 |
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