| 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 |
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