This article was accepted into the corpus but its outbound wikilinks were never NER-processed — typical at the deepest BFS hop or when the run's entity cap was reached. No expansion funnel to show.
| IberArray | |
|---|---|
| Name | IberArray |
| Type | Seismic Array |
| Established | 2007 |
| Region | Iberian Peninsula, Morocco |
| Operators | Spanish National Research Council; Portuguese Institute of Sea and Atmosphere; University of Barcelona; University of Porto |
| Partners | European Plate Observing System; Global Seismographic Network; IRIS |
| Components | Broadband seismometers, strong-motion accelerometers, borehole sensors |
IberArray
IberArray is a temporary, dense broadband seismic deployment and coordinated observational initiative that surveyed the lithospheric and upper mantle structure across the Iberian Peninsula and adjacent regions. The project combined portable seismic stations, permanent observatories, and collaborative campaigns to map crustal heterogeneity, image seismic anisotropy, and monitor seismicity across Spain, Portugal, and northern Morocco. IberArray served as a regional component within broader European and global observational frameworks, contributing data to multinational initiatives and comparative studies of continental dynamics.
IberArray began as a regional component of the Transnational European projects associated with the European Plate Observing System and engaged with networks like IRIS and the Global Seismographic Network. The program was conceived following continental-scale imaging efforts such as the USArray and other portable arrays deployed during initiatives like the European Geotraverse and the AlpArray project. Initial planning involved research groups at the Spanish National Research Council, the University of Barcelona, the University of Granada, and the University of Porto, coordinating logistics with national agencies such as the Instituto Geográfico Nacional (Spain) and the Instituto Português do Mar e da Atmosfera. Funding and technical support drew on competitive grants from programs associated with the European Commission and national science foundations, mirroring precedents set by deployments like AusArray and USArray Transportable Array.
The array architecture adopted instrument standards compatible with the Global Seismographic Network and portable initiatives like USArray Transportable Array. Sensor types included broadband three-component seismometers such as the Streckeisen STS-2 and intermediate-period models, collocated with strong-motion accelerometers used in campaigns pioneered by the Network for Earthquake Engineering Simulation. Stations were typically housed in vaults or shallow boreholes similar to installations at the Icelandic Meteorological Office sites and used digitizers conforming to Streckeisen/Quanterra specifications for high-resolution timestamps tied to GNSS timing. Telemetry solutions ranged from satellite links used by observatories like NOAA to cellular telemetry frameworks employed in regional projects such as Cascadia Initiative pilot stations. Standard sampling rates, telemetry protocols, and metadata formats ensured interoperability with archives like the Incorporated Research Institutions for Seismology data centers and the European-Mediterranean Seismological Centre.
IberArray deployed a dense grid of temporary stations across peninsular Spain and Portugal with transects extending into northern Morocco, emulating spatial strategies used in USArray and AlpArray to provide laterally continuous coverage. Station spacing varied from tens to one hundred kilometers depending on campaign objectives, with denser clusters in tectonically complex zones such as the Betic Cordillera, the Pyrenees, and the Gulf of Cádiz margin. Deployments coordinated with national permanent networks operated by institutions like the Instituto Geográfico Nacional (Spain) and the Instituto Português do Mar e da Atmosfera to form hybrid arrays. Temporary field campaigns synchronized with other regional efforts including studies by the Spanish National Research Council teams in the Iberian Massif and collaborations with Moroccan agencies near the Rif Mountains.
IberArray supported crustal and mantle tomography, receiver function studies, and surface-wave dispersion analyses following methodologies applied in projects such as AlpArray and USArray. Investigations targeted lithospheric structure beneath tectonic provinces including the Variscan Belt, the Cantabrian Mountains, and the Betics, and addressed questions about subduction remnants linked to the Alboran Sea and the Tethys Ocean closure. The array enabled seismic hazard assessment efforts analogous to those of the European Mediterranean Seismological Centre, improving constraints on seismic source characterization for events like the 1755 Lisbon earthquake and recent regional sequences. Additionally, studies of seismic anisotropy and mantle flow drew comparisons with mantle dynamics inferred beneath regions such as Iceland and the Carpathians.
IberArray generated waveform datasets, station metadata, event catalogs, and derived products including tomographic models, receiver functions, shear-wave splitting measurements, and ambient-noise correlation results. Data were archived in formats compatible with IRIS and the European-Mediterranean Seismological Centre to facilitate reuse alongside global collections like the Global Centroid Moment Tensor catalog. Performance metrics emphasized high signal-to-noise ratios for teleseismic phases, robust timing accuracy using GNSS clocks, and continuity benchmarks similar to those reported by permanent networks such as RESIF and GeoNet. Derived tomographic images contributed to continental-scale compilations analogous to syntheses from the International Seismological Centre.
Field maintenance followed best practices established by long-term programs like USArray Transportable Array and observatory consortia including the European Plate Observing System. Upgrades to sensors, telemetry, and metadata workflows kept compatibility with standards promulgated by IRIS and the International Federation of Digital Seismograph Networks. Interoperability allowed joint analyses with datasets from projects such as AlpArray, CENC initiatives, and national networks like the Instituto Geográfico Nacional (Spain), facilitating multinational seismic monitoring and joint hazard assessment exercises.
Major participants included the Spanish National Research Council, the University of Barcelona, the University of Granada, the University of Porto, and national services such as the Instituto Geográfico Nacional (Spain) and the Instituto Português do Mar e da Atmosfera. International partners and data repositories involved IRIS, the European Plate Observing System, and the European-Mediterranean Seismological Centre. Funding and support came from competitive instruments associated with the European Commission, national research councils like the Spanish Ministry of Science and Innovation and the Fundação para a Ciência e a Tecnologia, and collaborative grants modeled on initiatives funded by agencies such as the National Science Foundation.