| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| K5 |
|
Bhutan Seismic Network | 2017 | 2599 |
| KC |
|
|
|
2599 |
| KD |
|
Decentralized onsite earthquake early warning network Bishkek | 2012 | 2599 |
| KG |
|
Korean Seismic Network - KIGAM | 1997 | 2599 |
| KN |
|
Kyrgyz Seismic Telemetry Network | 1991 | 2599 |
| KO |
|
|
1971 | 2599 |
| KP |
|
|
|
2599 |
| KQ |
|
CAU Kiel | 1980 | 2599 |
| KR |
|
Kyrgyz Digital Network | 2007 | 2599 |
| KS |
|
Korea National Seismography Network (KNSN-KMA) | 2006 | 2599 |
| KT |
|
KROTONE SEISMIC NETWORK | 2003 | 2599 |
| KV |
|
KivuSNet | 2013 | 2022 |
| KW |
|
Kuwait National Seismic Network | 1997 | 2599 |
| KY |
|
Kentucky Seismic and Strong Motion Network | 1982 | 2599 |
| KZ |
|
Kazakhstan Network | 1994 | 2599 |
| LA |
|
Los Angeles Basin Seismic Network | 1988 | 2999 |
| LB |
|
Leo Brady Network | 1994 |
|
| LC |
|
LSC (Laboratorio Subterraneo de Canfranc) | 1980 | 2599 |
| LD |
|
Lamont-Doherty Cooperative Seismographic Network | 1970 | 2599 |
| LE |
|
LE | 1980 | 2599 |
| LH |
|
Large High-Performance Outdoor Shake Table | 2023 | 2599 |
| LI |
|
Laser Interferometer Gravitational-Wave Experiment | 2000 | 2599 |
| LM |
|
Michigan State University Seismic Network | 2016 | 2599 |
| LO |
|
Observatorio Sismológico Politécnico Loyola | 2012 | 2599 |
| LX |
|
|
|
2599 |
| WA |
|
West Central Argentina Network | 1958 | 2599 |
| WB |
|
West Bohemia Local Seismic Network (WEBNET) | 1980 | 2599 |
| WC |
|
Curacao Seismic Network |
|
2599 |
| WG |
|
WG_(WA-ARRAY Network) | 2022 | 2599 |
| WI |
|
West Indies French Seismic Network | 2008 |
|
| WM |
|
|
1980 | 2599 |
| WR |
|
California Division of Water Resources | 1964 | 3000 |
| 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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