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RV POSEIDON Fahrtbericht / Cruise Report POS515 : CALVADOS - CALabrian arc mud VolcAnoes: Deep Origin and internal Structure Dubrovnik (Croatia) – Catania (Italy) 18.06.-13.07.2017 (2017)

Poseidon [Sonstige Person, Familie und Körperschaft]

Kiel : GEOMAR, Helmholtz-Zentrum für Ozeanforschung

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Type of Medium: Online Resource

Pages: 1 Online-Ressource (72 Seiten)

Series Statement: GEOMAR Report N. Ser. 36

URL: https://oceanrep.geomar.de/39114/

Language: English

Note: Zusammenfassung in deutscher und englischer Sprache

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GEOMAR CATALOGUE

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Multibeam bathymetry gridded data from SONNE cruise SO252 (2021)

Berndt, Christian ; Klaucke, Ingo ; Kühn, Michel

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Publication Date: 2024-04-20

Description: This processed and gridded multibeam echolot dataset was acquired during SONNE cruise SO252 offshore Ritter Island, Papua New Guinea in November/December 2016. The data was collected in order to investigate the 1888 Ritter Island Sector Collapse deposit. The data was acquired using a hull-mounted Kongsberg Simrad EM122 multibeam echolot system and was gridded with a 25 m gridcell size. Before gridding, data was filtered with a trianguation filter in three iterations and residual erroneous soundings were deleted manually. Detailed information on the data acquisition parameters and processing can be found in the SO252 cruise report (https://doi.org/10.3289/CR_SO252). This grid extents between 147°40' E and 148°15' E, and -5° 35' N and -4° 50' N and covers the seafloor around Ritter Island, Sakar, and Umboi.

Keywords: Bathymetry; Bismarck Sea; MB; Multibeam; RitterIsland; Ritter Island; SO252; SO252_13-1; SO252_26-1; SO252_29-1; SO252_35-1; SO252_39-1; SO252_41-1; SO252_44-1; SO252_49-1; SO252_58-1; SO 252 - RITTER ISLAND: Tsunamipotential von vulkanischen Flankenkollapsen; Sonne_2

Type: Dataset

Format: application/x-netcdf, 44.8 MBytes

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DATA PANGAEA

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2D multichannel seismic reflection processed data (GI Gun entire dataset) of RV METEOR during cruise M154/1 (2023)

Kühn, Michel ; Berndt, Christian ; Krastel, Sebastian

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Publication Date: 2024-04-20

Description: This 2D multi-channel seismic dataset was acquired during METEOR cruise M154-1 offshore Montserrat in April 2019. The dataset contains ~600 km of normal-moveout-corrected, stacked and migrated vertical seismic profiles. Aim of the seismic experiment was to map and image landslide deposits offshore Montserrat. The data was collected with a 81 m to 152 m-long (16 to 65 channels) streamer system with a group spacing of 1.56 m. The system consisted of two to seven 12.5 m-long active sections, a 25 m-long vibro-stretch section and a 31 to 40 m-long tow cable. As seismic source, two GI airguns (105/105 cubic inch) were shot every five seconds. Seismic data processing included trace editing, highpass filtering (25 Hz cut and 55 Hz slope corner frequencies), denoising, deconvolution, normal moveout correction, stacking and finite-difference migration with a gradient velocity model (1580 m/s to 1725 m/s). Detailed information on the data acquisition can be found in the M154-1 cruise report (https://doi.org/10.2312/cr_m154_1).

Keywords: 2D seismic data; Binary Object; Comment; Common depth point; DATE/TIME; Event label; LATITUDE; LONGITUDE; M154/1; M154/1_15-1; M154/1_17-1; MCS seismic; Meteor (1986); multi-channel seismic reflection; reflection seismics; SEIS; Seismic; Start of data file recording, date/time; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file recording, date/time; Stop of data file recording, latitude; Stop of data file recording, longitude

Type: Dataset

Format: text/tab-separated-values, 280 data points

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DATA PANGAEA

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2D multi-channel seismic data from SONNE cruise SO252 offshore Ritter Island, 2016, Bismarck Sea, Papua New Guinea (2021)

Berndt, Christian ; Kühn, Michel ; Karstens, Jens

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Publication Date: 2024-04-20

Description: This 2D multi-channel seismic dataset was acquired during SONNE cruise SO252 offshore Ritter Island, Papua New Guinea in November/December 2016. The dataset contains 680 km of normal-moveout-corrected and stacked vertical seismic profiles. Aim of the seismic experiment was to map and image the deposit of the 1888 Ritter Island Sector Collapse. The data was collected with a 250 m-long (160 channels) streamer system with a group spacing of 1.56 m. The system consisted of twenty 12.5 m-long active sections, a 25 m-long vibro-stretch section and 60 m-long tow cable. As seismic source, two GI airguns, shot in harmonic mode (105/105 cubic inch) were used. The data were processed with a 10, 45, 250, 400 Hz bandpass filter and a normal moveout correction (constant velocity: 1495 m/s). Detailed information on the data acquisition can be found in the SO252 cruise report (https://doi.org/10.3289/CR_SO252).

Keywords: Binary Object; Binary Object (File Size); Bismarck Sea; MCSEIS; Multichannel seismics; RitterIsland; Ritter Island; seismic data; SO252; SO252_5-1; SO 252 - RITTER ISLAND: Tsunamipotential von vulkanischen Flankenkollapsen; Sonne_2

Type: Dataset

Format: text/tab-separated-values, 42 data points

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3D multichannel seismic reflection processed data (P-Cable system with GI Gun) from RV POSEIDON cruise POS538, Kolumbo Volcano, Aegean Sea (2023)

Crutchley, Gareth J ; Karstens, Jens ; Elger, Judith ; [et al.]

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Publication Date: 2024-04-20

Description: Included here are 3D post-stack time migrated data from the Kolumbo Volcano in the Aegean Sea. The data were collected aboard RV Poseidon in 2019 during Research Cruise POS538 using GEOMAR's P-Cable seismic system. Seismic source was a Generator-Injector airgun fired in harmonic mode with generator and injector volumes of 45 cubic inches. The source was towed at a nominal depth of 2 m beneath the sea surface. Shot interval was 4 seconds at a ship speed of ~3.5 knots. Gun pressure was set at 200 bar. The receiver geometry consisted of 16 streamer sections attached to a 199 m long cross cable. Processing included: 3D geometry application, trace editing, static time corrections, anomalous amplitude attenuation, FK filtering, pre-stack trace interpolation, adaptive subtraction multiple suppression using a 1D pattern matching algorithm, sorting to common midpoint gathers, normal moveout correction (1517 m/s constant velocity), stacking, trace interpolation, 3D FK coherency filtering, 3D Stolt migration (1517 m/s constant velocity), residual 2D finite difference migration (first inline, then crossline). The dataset has a horizontal resolution of 3.125 m (bin size) and a dominant frequency of ~100 Hz. Acquisition and processing details are included in the EBCDIC header of the SEG-Y file.

Keywords: 3D seismic data; Aegean Sea; Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); File content; Kolumbo Volcano; P-Cable; POS538; POS538_10-1; Poseidon; SEIS; Seismic; THESEUS

Type: Dataset

Format: text/tab-separated-values, 2 data points

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3D multichannel seismic reflection processed data (P-Cable system with GI Gun) of RV METEOR during cruise M154/1, Montserrat, Lesser Antilles (2023)

Kühn, Michel ; Berndt, Christian ; Krastel, Sebastian

PANGAEA

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Publication Date: 2024-04-20

Description: Included here are 3D post-stack time migrated data from Montserrat, Lesser Antilles. The data were collected aboard RV METEOR in 2019 during Research Cruise M154/1 using GEOMAR's P-Cable seismic system. Seismic source were two Generator-Injector airguns fired in TRUE GI mode with generator and injector volumes of 105 cubic inches. The source was towed at a nominal depth of 2 m beneath the sea surface. Shot interval was 5 seconds at a ship speed of ~3.5 knots. Gun pressure was set at 160 bar. The receiver geometry consisted of 14 to 16 streamer sections attached to a 199 m long cross cable. Processing included: 3D geometry application, trace editing, static time corrections, anomalous amplitude attenuation, FK filtering, pre-stack trace interpolation, adaptive subtraction multiple suppression, sorting to common midpoint gathers, normal moveout correction (1580 m/s to 1725 m/s gradient velocity model), stacking, trace interpolation, 3D FK coherency filtering, 3D finite difference migration (1580 m/s to 1725 m/s gradient velocity model; first inline, then crossline). The dataset has a horizontal resolution of 3.125 m (bin size) and a dominant frequency of ~100 Hz.

Keywords: Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); File content; M154/1; M154/1_14-1; M154/1_16-1; M154/1_18-1; Meteor (1986); P-Cable; P-Cable 3D Seismic; P-Cable 3D seismic cube; Sector Collapse; SEIS; Seismic; Volcanic flank collapse

Type: Dataset

Format: text/tab-separated-values, 2 data points

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The complex emplacement dynamics and tsunami genesis of the 1888 Ritter Island sector collapse from 3D seismic data (2017)

Karstens, Jens ; Urlaub, Morelia ; Berndt, Christian ; [et al.]

In: [Poster] In: AGU Fall Meeting 2017, 11.12 - 15.12.2017, New Orleans, USA .

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Publication Date: 2019-04-08

Description: On March 13 1888, a large sector of the subaerial and submarine edifice of Ritter Island (Papua New Guinea) collapsed and slid into the Bismarck Sea, triggering a tsunami with a run-up height of more than 25 m on the neighboring islands. The tsunami traveled for more than 600 km and caused destruction in several settlements. German colonists described in detail the timing of the arriving waves. During research cruise SO252 onboard RV Sonne, we collected a comprehensive set of multibeam and sediment echosounder data, seafloor video footage, rock samples, 2D seismic profiles, and a 60 km2 high-resolution Pcable 3D seismic cube. This dataset, combined with the historic eyewitness accounts, allows detailed reconstruction of the large-scale volcanic sector collapse and the associated tsunami genesis. The 3D seismic cube shows a change of emplacement dynamics between the initial phase of mass movement and the final collapse of the volcanic edifice.that failure occurred in at least in two steps. The initial failure occurred along a deep slide plane extending from the volcanic cone up to 300 m deep into the seafloor sediments adjacent to the volcanic edifice. Movement of large, intact sediment blocks and shortening characterize this deep-rooted mass-movement. In contrast to the well-preserved mobilization structures in the deep part of the volcanic edifice related to the first phase, there are hardly any proximal deposits of the 2 km3 of the upper part of the volcanic edifice, comprising bedded volcaniclastic stratigraphy, including the subaerial island, which were mobilized in the second phase, indicating that this phase was highly energetic. Instead, the moving mass of the second phase eroded deeply into the deposits of the first slide phase. The fast moving mass was channelized between two volcanic ridges, transported into the basin west of Sakar Island, and then deposited more than 30 km away from its source. We interpret the separation into two phases as the result of gravitational acceleration of the sliding mass leading to a decoupling of the cone from the deeper edifice or a phreatomagmatic explosion due to the contact of the magmatic conduit with seawater.

Type: Conference or Workshop Item , NonPeerReviewed

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