| XH (1996-1997) | 
                        
                            Altiplano-Puna Volcanic Complex Seismic Experiment | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (1998-1999) | 
                        
                            TransAlp-1 | 
                        
                             | 
                        
                            Germany | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2000-2000) | 
                        
                            ISSA2000 | 
                        
                             | 
                        
                            Germany | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2001-2001) | 
                        
                            START | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2002-2003) | 
                        
                            Integrated Seismological Studies of Crust and Upper Mantle Structure in Western Anatolia | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2004-2004) | 
                        
                            Seismic Array Studies of Cascadia Deep Tremor | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2005-2006) | 
                        
                            Cascade Tiltmeter Array | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2007-2007) | 
                        
                            Hawaiian South Flank Slow EQ Project | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2008-2010) | 
                        
                            Eastern Sierras Pampeanas, Lithospheric Structure above the variably dipping Nazca Slab | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2011-2011) | 
                        
                            Seismic Survey of Greeland Icesheet Margins | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2012-2013) | 
                        
                            Small aperture array for observing a slow slip event on Kilauea volcano. | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2014-2017) | 
                        
                            Collaborative Research: Collaborative Research: Dynamic Response of the Ross Ice Shelf to Ocean Waves and Structure and Dynamics of the Ross Sea from a Passive Seismic Deployment on the Ross Ice Shelf | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2018-2019) | 
                        
                            PREST in Cuba | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2020-2020) | 
                        
                            White Sand Test Facility ANSWT Noise Test | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2021-2021) | 
                        
                            Fagradalsfjall Acoustics | 
                        
                             | 
                        
                            — | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2022-2024) | 
                        
                            FocusX temporary OBS-network | 
                        
                             | 
                        
                            — | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XH (2025-2028) | 
                        
                            Jersey Valley Seismic Array | 
                        
                             | 
                        
                            — | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (1994-1994) | 
                        
                            GEDEPTH 1 | 
                        
                             | 
                        
                            Germany | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XI (1995-1997) | 
                        
                            Broadband Seismic Characterization of the Arabian Shield | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (1998-1999) | 
                        
                            Study of Changbai Volcanoes and Deep Subduction Zone | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2000-2002) | 
                        
                            Seismic Investigation of Deep Structure Beneath the Ethiopian Plateau and Afar Depression | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2003-2004) | 
                        
                            TAG Hydrothermal Mound Passive Seismic Experiment | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2005-2005) | 
                        
                            3D Tomographic Imaging of the Chicxulub Crater | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2006-2006) | 
                        
                            South Pole Analysis of Machines, Characterization of High Frequency Noise Generated at the South Pole Station, Antarctica | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2007-2010) | 
                        
                            Collision of the Burma Arc accretionary prism and foldbelt with the Ganges-Brahmaputra Delta in Bangladesh | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2011-2013) | 
                        
                            Superior Province Rifting Earthscope Experiment | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2014-2014) | 
                        
                            Long Beach Broadband or LA Syncline Seismic Interferometry Experiment | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2015-2017) | 
                        
                            Enid OK Network | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2018-2023) | 
                        
                            Instrumentation for Multidisciplinary Monitoring of an Alaskan Peatland | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2024-2024) | 
                        
                            Seismic Baseline Survey Along the Northern Gulf of Mexico in Texas | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XI (2025-2025) | 
                        
                            K3-Matelles | 
                        
                             | 
                        
                            — | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (1988-1988) | 
                        
                            Argo Abyssal Plain VSP | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (1994-1994) | 
                        
                            RESERVED | 
                        
                             | 
                        
                            — | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (1995-1996) | 
                        
                            Adirondack Broadband Campaign | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (1997-1997) | 
                        
                            The Sierran Paradox Experiment | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (1998-1999) | 
                        
                            Side Edge of Kamchatka Subduction | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2000-2001) | 
                        
                            Eastern Snake River Plain Experiment, Shear-wave Splitting in the Snake River Plain | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2002-2003) | 
                        
                            Ethiopian Afar Geophysical Lithospheric Experiment | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2004-2006) | 
                        
                            Seismic Experiment in the Aisen Region of Chile | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2007-2007) | 
                        
                            Tomo TEIDEVS | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2008-2008) | 
                        
                            Wells, Nevada Aftershock Recording | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2009-2009) | 
                        
                            L' Aquila Aftershock Experiment | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2010-2010) | 
                        
                            High-resolution imaging of magma transport at the summit of Kilauea Volcano | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2011-2011) | 
                        
                            Gulf of Mexico Hydrates Research Consortium | 
                        
                             | 
                        
                             | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2012-2012) | 
                        
                            Fuego Volcano VLP and Tilt Experiment | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2013-2015) | 
                        
                            Magadi-Natron Magmatic Rifting Studies | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2016-2017) | 
                        
                            Impact of subglacial discharge on turbulent plume dynamics and ocean-glacier heat and mass transfer | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XJ (2018-2027) | 
                        
                            Deployments associated with OBS deployments in Swiss Lakes | 
                        
                             | 
                        
                             | 
                        
                             DOI | 
                        
                    
                    
                
                    
                    
                        
                            | XK (1993-1994) | 
                        
                            RESERVED | 
                        
                             | 
                        
                            — | 
                        
                            — | 
                        
                    
                    
                
                    
                    
                        
                            | XK (1995-1995) | 
                        
                            ICEMELT, Anarctica | 
                        
                             | 
                        
                            — | 
                        
                            — |