1,721,139 research outputs found
2D multichannel seismic reflection processed data (GI Gun working area dataset) of RV POSEIDON during cruise POS515, Venere mud volcano, Calabrian Arc, Mediterranean Sea
No full textThe data set constitutes a total of 84 2D multichannel seismic lines acquired in parallel 2D mode across Venere mud volcano. An additional 7 lines were acquired across a grid of 12 OBS deployed in the region. Data are fully processed and migrated (in time). Main processing steps include: Geometry definition, Common-Mid-(CMP) Point sorting, Normal-Moveout-Corrention (NMO) using an average velocity function (extracted from ocean-bottom-seismometer data), Stacking and FK-Migration (in time). Data processing was completed using the VISTA processing package, provided by Schlumberger to GEOMAR. Data acquisition for this survey started with profile P1001 on June 21, 2017 (at 17:30, CET) at a position of 38°34.42'N, 17°08.66'E. Data acquisition for this survey ended with profile P1102 on July 2, 2017 (at 04:00, CET) at a position of 38°40.39'N, 17°07.97'E
3D multichannel seismic reflection processed data (P-Cable system with GI Gun) of RV POSEIDON during cruise POS515, Calabrian Arc, Mediterranean Sea
No full textThe data are a processed and interpolated P-Cable 3D seismic data cube. The data were collected during expedition POS515 with the research vessel POSEIDON (Riedel et al., 2017) in the Mediterranean Sea, Calabrian Arc offshore southern Italy (map under further details). Seismic source was a Generator-Injector airgun fired in harmonic GI mode with generator and injector volume of 105 cubic inches. The source was towed at a nominal depth of 2 m beneath the sea surface. We deployed a P-Cable system made from 12 parallel streamers (each 12. 5 m in length). Details on the towed geometry are given in Figure 30 of the cruise report (Riedel et al., 2017). The P-Cable data were acquired over the course of 6 days during POS515 starting from 13:45 on July 5, 2017 until 12:06 on July11, 2017 (all CET). Processing included: 3D geometry application, trace editing, static time corrections, band-pass filtering, sorting to common midpoint gathers, normal moveout correction (1520 m/s velocity ), and stacking. The stacked 3D cube was then interpolated to fill any empty bins. Afterwards, Stolt time migration (1550 m/s) was performed, first inline, then crossline direction. The dataset has a horizontal resolution of 3.125 m (bin size) and a dominant frequency of ~100 Hz
Continous seismic raw data (Ocean Bottom Seismometer working area dataset) of RV POSEIDON during cruise POS515, Poseidon mud volcano chain, Calabrian Arc, Mediterranean Sea
No full textThe data comprise continuous records of seismic raw data acquired with ocean bottom seismometers (OBS). The data were collected at Poseidon mud volcano chain during expedition POS515 with the research vessel POSEIDON (Riedel et al., 2017) in the Mediterranean Sea, Calabrian Arc offshore southern Italy (map under further details). The entire data set consists of 12 OBS stations. Each OBS consist of 4 channels (channel 1: hydrophone; channel 2: horizontal component 1; channel 3: horizontal component 2; channel 4: vertical component). Data are not corrected for clock-drift. Data format is Passcal-SEGY. Data are accessible using the seismological software tools provided by EarthScope: https://www.passcal.nmt.edu/content/software-resources. The data were recorded using: HTI-04_PCA_ULF hydrophones from High Tech Inc., Short-period 4.5 Hz geophones and Three-component seismometers (K/MT-210 manufactured by KUM GmbH). The recording device is an MBS recorder of SEND Gmb
Preliminary interpretation of high resolution 3D seismic data from offshore Mt. Etna, Italy
No full textSeismic processed data (Ocean Bottom Seismometer working area dataset) of RV POSEIDON during cruise POS515, Venere mud volcano, Calabrian Arc, Mediterranean Sea
No full textThe data comprise processed active-source seismic data acquired with ocean bottom seismometer (OBS) data. The data were collected at Venere mud volcano during expedition POS515 with the research vessel POSEIDON (Riedel et al., 2017) in the Mediterranean Sea, Calabrian Arc offshore southern Italy (map under further details). The entire data set consists of 11 OBS stations. Seismic data were shot across the OBS along seven profiles. Each OBS consist of 4 channels (channel 1: hydrophone; channel 2: horizontal component 1; channel 3: horizontal component 2; channel 4: vertical component)
Seismic processed data (Ocean Bottom Seismometer working area dataset) of RV POSEIDON during cruise POS515, Poseidon mud volcano, Calabrian Arc, Mediterranean Sea
No full textThe data comprise processed active-source seismic data acquired with ocean bottom seismometers (OBS). The data were collected at Poseidon mud volcano chain during expedition POS515 with the research vessel POSEIDON (Riedel et al., 2017) in the Mediterranean Sea, Calabrian Arc, offshore southern Italy. The entire data set consists of 12 OBS stations. Seismic data were shot across the OBS along 14 2D profiles. Each OBS consist of 4 channels (channel 1: hydrophone; channel 2: horizontal component 1; channel 3: horizontal component 2; channel 4: vertical component)
Continous seismic raw data (Ocean Bottom Seismometer working area dataset) of RV POSEIDON during cruise POS515, Venere mud volcano, Calabrian Arc, Mediterranean Sea
No full textThe data comprise continuous records of seismic raw data acquired with ocean bottom seismometers (OBS). The data were collected at Venere mud volcano during expedition POS515 with the research vessel POSEIDON (Riedel et al., 2017) in the Mediterranean Sea, Calabrian Arc offshore southern Italy (map under further details). The entire data set consists of 11 OBS stations. Each OBS consist of 4 channels (channel 1: hydrophone; channel 2: horizontal component 1; channel 3: horizontal component 2; channel 4: vertical component). Data are not corrected for clock-drift. Data format is Passcal-SEGY. Data are accessible using the seismological software tools provided by EarthScope: https://www.passcal.nmt.edu/content/software-resources. The data were recorded using: HTI-04_PCA_ULF hydrophones from High Tech Inc., Short-period 4.5 Hz geophones and three-component seismometers (K/MT-210 manufactured by KUM GmbH). The recording device is an MBS recorder of SEND GmbH
2D multichannel seismic reflection processed data (GI Gun working area dataset) of RV POSEIDON during cruise POS515, Poseidon mud volcano chain, Calabrian Arc, Mediterranean Sea
No full textThe data set contains 13 2D multichannel seismic lines acquired across Poseidon mud volcano chain, Caalbrian Arc, offshore southern Italy. Data were processed onboard during expedition POS515 with R/V POSEIDON. These lines were also recorded on 12 OBS. Details see cruise report (Riedel et al., 2017). Main processing steps include: Geometry definition, Common-Mid-(CMP) Point sorting (1.5625 m bin-space), Normal-Moveout-Corrention (NMO) using a constant velocity of 1500 m/s and Stacking Stolt-Migration (in time) with constant velocity of 1500 m/s. Data processing was completed onboard using the SU processing package. Seismic Surveying at Poseidon mudvlcano started with line P4001 on July 3, 2017 (08:22 am, CET) at 17°40.12'E, 38°21.58N. The last line acquired in this sequence is line P6010. Surveying ended on July 5, 2017 at 04:00 am (CET) at 17°43.12'E, 38°18.96'N
Ocean bottom seismometer and ocean bottom hydrophone seismic refraction and wide angle data from profile P02 of Maria S. Merian cruise MSM69 with links to sgy data files
No full textIn December 2017, the St. Paul fracture zone near 18°W was surveyed seismically during Maria S. Merian cruise MSM69. Fourteen ocean-bottom-seismometers and hydrophones sampled seismic shots fired along a 140 km long seismic profile, running within the ~10 km wide valley of the fracture zone, that separates 40 Ma crust in the south with 70 Ma crust in the north
Ocean bottom seismometer and ocean bottom hydrophone seismic refraction and wide angle data from profile P01 of Maria S. Merian cruise MSM69 with links to sgy data files
No full textDuring MSM69, in November and December of 2017, an 1100-km-long transect in the equatorial Atlantic Ocean aboard the German research vessel MARIA S. MERIAN. The profiles runs from 12.8°W/2.8°S,for 75 km on the South American plate, crosses the Mid-Atlantic Ridge and terminates at 3.2°W/0.7°S, roughly covering zero-age to approximately 50 Myr old lithosphere of the African plate. The seismic refraction and wide-angle transect was covered with 71 Ocean-Bottom-Seismometers and hydrophones spaced at 10 to 20 km intervals. The profile was shot at an increased interval of 210 s to decrease the shot-induced-level, improving signal-noise-ratio and providing an average shot spacing of 410 m.
Seismic data in SEGY format are reduced with 8 km/s and the origin of the time series is at -1 sec
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