| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| DE |
|
Nanometrics Research Network | 2013 | 2599 |
| DK |
|
Danish Seismological Network | 1976 | 2599 |
| DR |
|
Centro Nacional de Sismologia (CNS) | 1998 | 2599 |
| DT |
|
Carnegie Analog Broadband Seismograph Network | 1965 | 2003 |
| DU |
|
Seismological Association of Australia | 1995 | 2599 |
| DW |
|
Digital World-Wide Standardized Seismograph Network | 1980 | 1994 |
| WA |
|
West Central Argentina Network | 1958 | 2599 |
| WC |
|
Curacao Seismic Network | 2006 | 2599 |
| WI |
|
West Indies French Seismic Network | 2008 | 2599 |
| WM |
|
Western Mediterranean Seismic Network | 1980 | 2599 |
| WU |
|
The Southern Ontario Seismic Network | 1991 | 2599 |
| WW |
|
Idaho Seismic Network | 2022 | 2599 |
| WY |
|
Yellowstone National Park Seismograph Network | 1983 | 2599 |
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by the CoreTrustSeal Standards and Certification Board
