Litospheric Structure of the North Iberian Margin: MARCONI-WA reflection profiles

An onshore-offshore network of 24 Ocean-Bottom Seismometers or Hydrophones (12 OBS and 8 OBH) and 35 land stations deployed in 46 different sites. The OBS/OBH network remained fixed during all the experiment and covered on place all the profile intersections, with an average spacing of 30–40 km. The land seismic stations were deployed with an average spacing of 10–15 km extending the N-S profiles onshore, with some additional instruments following the shoreline. The seismic source consisted of a Bolt airgun array fired every 40 s, resulting in a shot spacing of 100 m. The shooting pressure was set constant at 140 bars.