| Network | Data Center | Description | Start Year | End Year |
|---|---|---|---|---|
| 4A |
|
Mapping the structure of the Duluth Complex & Animikie Basin | 2022 | 2024 |
| 4A |
|
SP Crater Network | 2016 | 2019 |
| 4A |
|
Darfield RAMP Aftershock Deployment, NZ | 2010 | 2011 |
| 4A |
|
Investigating mechanisms of subglacial hydrology and basal shear stress beneath Whillans Ice Stream using passive seismology | 2008 | 2008 |
| 4B |
|
Seismometer to Investigate Ice and Ocean Structure (SIIOS) Field Experiment: Hiawatha Crater, Greenland | 2022 | 2022 |
| 4E |
|
MARS/Testing of cabled broadband OBS using MARS test facility | 2010 | 2011 |
| 4F |
|
North Texas Earthquake Study: Venus (Johnson County), TX | 2015 | 2025 |
| 4F |
|
Askja 2007 | 2007 | 2011 |
| 4H |
|
Oklahoma State University Seismic Network | 2014 | 2017 |
| 4H |
|
Nabro Urgency Array | 2011 | 2012 |
| 4J |
|
Red sísmica Bioko | 2017 | 2024 |
| 4K |
|
Ruegen Cliff Observatory | 2017 | 2022 |
| 4K |
|
UAE transects across the Semail Ophiolite | 2014 | 2016 |
| 4N |
|
4N - New Jersey 2024 Earthquake Sequence | 2024 | 2025 |
| 4P |
|
Carnegie Washington Backyard Network | 2020 | 2021 |
| 4P |
|
NSF EarthScope USArray Magnetotelluric Transportable and Backbone Arrays | 2006 | 2018 |
| 4S |
|
STAK | 2018 | 2018 |
| 4T |
|
Texas Seismological Network | 2018 | 2099 |
| 4U |
|
São Jorge OBS Network | 2022 | 2023 |
| 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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