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9 results for “ocean bottom seismometers”
Database of local seismicity registered on ocean bottom seismometers (OBS). Database related to Bornstein et al. (accepted in Earth and Space Science), PICKBLUE
<p>We assembled a database of Ocean Bottom Seismometer (OBS) waveforms and manual P and S picks from local seismicity, on which we trained PickBlue, a deep-learning picker, using the seismometer data and the hydrophone channel. The dataset belongs to Bornstein et al. (accepted 2023 in Earth and Space Science). The picker and database are available in the SeisBench platform, allowing easy and direct application to OBS traces and hydrophone records.</p><p>The complete database is also accessible with SEISBENCH: <br><a href="https://seisbench.readthedocs.io">https://seisbench.readthedocs.io</a><br>SEISBENCH on github:<br><a href="https://github.com/seisbench">https://github.com/seisbench</a></p><p>Related paper:</p><p>Bornstein, T., Lange, D., Münchmeyer, J., Woollam, J., Rietbrock., A., Barcheck, G., Grevemeyer, I., Tilmann, F. (accepted 2023 in Earth and Space Science). PickBlue: Seismic phase picking for ocean bottom seismometers with deep learning, Earth and Space Science. </p>
Dataset for Clock drift corrections for large aperture ocean bottom seismometer arrays: application to the UPFLOW array in the mid-Atlantic Ocean
<p>Dataset from Clock drift corrections for large aperture ocean bottom seismometer arrays: application to the UPFLOW array in the mid-Atlantic Ocean DOI: 10.1093/gji/ggae354.</p> <p>This dataset includes the clock drift polynoms refered to jthe deployment date (jul day from 2022) and consecutive days up to the recovery date. Two types of formats.</p> <ol> <li>Txt files</li> <li>Python Pickle files with a Dictionary containing the NumPY polynom1D and additional information.</li> </ol>
Ocean bottom seismometer data of the OBS2020-1 profile at the northern continental margin of the South China Sea
<p> Ocean bottom seismometer hydrophone data in SEG-Y format of 11 OBS stations along the OBS2020-1 profile and travel times used for the forward modeling and tomographic inversion. The travel times include the primary phases and secondary phases which are seawater layer multiples at the receiver side. Meanwhile, the OBS locations are also submitted to this repository.</p>
Teleseismic P records and ambient noise cross-correlations from a dense ocean-bottom seismometer array at Hyuga-nada
<p><strong>Telesesimic P and ambient noise cross-correlation dataset from a dense OBS array at Hyuganada, SW Japan. </strong> The dataset are used in a manuscript titled 'Shallow low-velocity layer in the Hyuga-nada accretionary prism and its hydrological implications: insights from a passive seismic array', which is submitted to the Journal of Geophysical Research: Solid Earth. It also contains necessary data for reproducing inversion analysis performed in the manuscript. </p> <ol> <li><em>Teleseismic_P.tar.gz</em>: contains teleseismic P wave forms in SAC format </li> <li><em>Noise_cross_corr.tar.gz</em>: contains ambient noise cross-correlation functions in SAC format</li> <li><em>Reproduce.tar.gz</em>: dataset for reproducing inversion analysis. <pre><code class="language-bash"># Example shell script for reproduce inversion results HDA01 cd Reproduce/INV/HDA01 mpirun -np 20 joint_inv joint_inv.in</code></pre> <p>The SEIS_FILO software (https://doi.org/10.5281/zenodo.6330840) is required for this reproduction.</p> </li> </ol>
Mobile Ocean Bottom Seismometer Instrument (MOBSI) data from Arctic rivers, lakes, and seas
<p>We collected the data using the Mobile Ocean Bottom Seismic Instrument (MOBSI). The MOBSI is portable (9 kg) and consists of a watertight, heavy-duty pressure housing (diameter 30 cm, height 35 cm) containing a three-component, broadband seismic sensor. There are three channels (two horizontal and one vertical) recorded by the built-in data logger to monitor ambient seismic noise. Deployed by a steel cable from a small boat or zodiac, the device was lowered to the bottom of the water bodies or the top of the beach area (if present). The device recorded ambient seismic noise for a few minutes before being retrieved and moved to a new location. The steel cable was outfitted with a communications cable, which allowed for live data analysis and quality control via a shipboard monitor. This ensured that the tilt of the instrument was correct (less than 5 degrees) and that the deployment time was sufficient. We stopped data collection when the "real-time" H/V ratio was stable, i.e., not changing with time. For all soundings, the sampling frequency was set to 100 samples per second. The MOBSI data was recorded in an internal RAW format that was converted to MINISeed format. In this paper, we present MOBSI data for seven survey lines from the Russian and the Canadian Arctic. The Banja Lake and Lena River profiles are situated in the Lena Delta, northeastern Siberia, Russia. Ivashkina Lagoon is located along the southern coastline of the Bykovsky Peninsula, northeastern Siberia, Russia. The Tuktoyaktuk profiles are located north of Tuktoyaktuk Island (Northwest Territories, Canada) in the Canadian Beaufort Sea. The survey lines presented in this manuscript are the following:</p> <p>Profile A-A' (Banja Lake): 8 soundings</p> <p>Profile B-B' (Banja Lake): 9 soundings</p> <p>Profile C-C' (Banja Lake): 9 soundings</p> <p>Profile D-D' (Lena River-Samoylov Island): 9 soundings</p> <p>Profile E-E' (Lena River-Chay-Tumus): 16 soundings</p> <p>Profile F-F' (Tuktoyaktuk Island): 10 soundings</p> <p>Profile G-G' (Tuktoyaktuk Island): 9 soundings</p> <p>Profile H-H' (Ivashkina Lagoon): 20 soundings</p> <p>The Excel file "MOBSI_soundings.xlsx" provides an overview of all the soundings, whereby each tab is split by the survey line. The latitude, longitude, water depth, and recording time for each sounding is provided.</p>
Airgun-ocean bottom seismometer survey dataset
<p>These data are the seismic waveform recordsections and the P-wave velocity model obtained by Azuma et al. (JGR, 2018), collected through an airgun-ocean bottom seismometer (OBS) survey.</p> <p>The recordsections of 29 OBS are 'RAW data' with no waveform procedure and are formatted in SEG-Y. Length of each trace is 60 seconds. Offset ranges, distances along the survey line, position of each shot and OBS, are included in header.</p> <p>The final velocity data is written in netCDF.</p>
Ocean bottom seismometer survey line OBS2016-2 across the magnetic quiet zone and continent-ocean boundary in the northeastern South China Sea
<p>OBS2016-2 dataset was collect in July, 2016. The ~320 km long NW-SE oriented profile OBS2016-2 is located to the east of the Dongsha Islands, extending from the Chaoshan Depression to the East Subbasin of the South China Sea. Seismic data were collected by R/V Shiyan-2 of South China Sea Institute of Oceanology (SCSIO), Chinese Academy of Science. The seismic sources are composed of four large volume Bolt airguns and the total airgun volume is 6000 in3. The firing interval was 90 s in time and 204 meters in distance, and the sailing speed of R/V Shiyan-2 was about 4.5 knots during the experiment. A total of 1572 shots were fired. Fifteen 4-component broadband OBSs were deployed, and fourteen of them were retrieved successfully with good data records. Data format is SAC.</p>
Data used in paper: Characteristics of shallow low-frequency earthquakes off the Kii Peninsula, Japan, in 2004 revealed by ocean bottom seismometers
<p>The data archived here is a set of the OBS waveform data used in the paper 'Characteristics of shallow low-frequency earthquakes off the Kii Peninsula, Japan, in 2004 revealed by ocean bottom seismometers', by Koji Tamaribuchi, Akio Kobayashi, Takahito Nishimiya, Fuyuki Hirose, and Satoshi Annoura.<br> <br> For more information, please contact the first author.</p>
Ocean Bottom Seismometer data of line OBS2017-2 in the South China Sea
<p>Dataset line OBS2017-2 was collected in June 2017, using R/V “Shiyan 2” that belongs to the South China Sea Institute of Oceanology, CAS. The spacing of OBSs was ~9.6 km. The seismic source consisted of an array of four BOLT air-guns with a total volume of 6,000 cubic inches and was towed at ~10 m depth below sea level. 1,767 shots had been fired along OBS2017-2 from south to north, and the shooting intervals were set at 80-110 s with a nominal ship speed of ~4.5 knots, resulting in a shooting interval of ~200 m on average.</p> <p>The format of seismic data is SAC. Please send the purpose of the data requesting, as well as the name and affiliation of the applicant to <a href="mailto:go223@scsio.ac.cn">go223@scsio.ac.cn</a>. The updated SEGY format data can be accessed through <a href="http://www.doi.org/10.11922/sciencedb.01267">http://www.doi.org/10.11922/sciencedb.01267.</a></p>
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