Henstock, Timothy J; Grevemeyer, Ingo; Robinson, Adam (2025): Seismic processed data (Ocean Bottom Seismometer working area dataset, profile P200w) during RRS JAMES COOK cruise JC228, Guatemala Basin, North Pacific Ocean [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.977816
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Published: 2025-05-26 • DOI registered: 2025-06-24
Abstract:
The data set comprise processed active-source seismic data collected with ocean bottom seismometer (OBS). The seismic shots were recorded in the Guatemala Basin studying the structure of oceanic crust. Data were obtained during the expedition JC228 of the research vessel RRS JAMES COOK in December 2022. The data set consists of 35 OBS stations deployed at an interval of approx. 7 km receiving shots of a tuned 5000 cubi-inch airgun array, fired at 90 s interval. The seismic line is a 220 km long West-East trending transect running in flowline dircetion of seafloor spreading. Each OBS consists of 4 channels (channel 1: hydrophone; channel 2: horizontal component 1; channel 3: horizontal component 2; channel 4: vertical component).
Related to:
Henstock, Timothy J; Grevemeyer, Ingo; Robinson, Adam: Ancillary navigational metadata from seismic processed data (Ocean Bottom Seismometer working area dataset, profile 200w) during RRS JAMES COOK cruise JC228, Guatemala Basin, Eastern Pacific Ocean. Ancillary_navigational_metadata_from_seismic_processed_data_Ocean_Bottom_Seismometer_working_area_dataset_profile_P200w_during_RRS_JAMES_COOK_cruise_JC228.zip
Funding:
Federal Ministry of Education and Research (BMBF), grant/award no. 03G0295OA: SO-OFEG - GUATOPS; IODP preliminary investigations on Moho in the Guatemala Basin; Project: Seismic images
NERC National Capability Funding, grant/award no. NE/M021246/1: From Ridge to Trench, MoHole to Bend-Faults
Coverage:
Median Latitude: 8.860000 * Median Longitude: -89.057476 * South-bound Latitude: 8.144600 * West-bound Longitude: -89.923600 * North-bound Latitude: 9.615800 * East-bound Longitude: -88.139000
Event(s):
JC228_P200_OBS201 * Latitude: 8.144600 * Longitude: -89.923600 * Campaign: JC228 * Basis: James Cook * Method/Device: Ocean bottom seismometer (OBS) * Comment: Event coordinates refer to the OBS deployment position
JC228_P200_OBS202 * Latitude: 8.188000 * Longitude: -89.871300 * Campaign: JC228 * Basis: James Cook * Method/Device: Ocean bottom seismometer (OBS) * Comment: Event coordinates refer to the OBS deployment position
JC228_P200_OBS203 * Latitude: 8.230500 * Longitude: -89.820100 * Campaign: JC228 * Basis: James Cook * Method/Device: Ocean bottom seismometer (OBS) * Comment: Event coordinates refer to the OBS deployment position
Comment:
The data are provided in SEG-Y format (reduced with 6 km/s and recording time starting at -1 s). Each uploaded file (140 files in total) consists of the airgun shots recorded with the individual Ocean-Bottom-Seismometers (OBS).
The naming convention is as follows using one file p200.obs201.1.sgy as an example:
p200: profile name of JC228 survey
obs201: OBS-station number (from 201 to 235)
1: channel number (1, 2, 3, 4)
sgy: data type
Each segy-data file has header-information set that can be used for plotting and analyses:
trace-count (tracr, byte : 1) shotpoint number (byte: 17-20)
shot X coordinate (sx, byte :73-76, coordinate: latitude x 360000)
shot Y coordinate (sy, byte: 77-80, coordinate: longitude x 360000)
OBS X coordinate (gx, byte: 81-84, coordinate: latitude x 360000)
OBS Y coordinate (gy, byte: 85-88, oordinate: longitude x 360000)
Binary: p200.obs201.ch1.sgy
Content: Ocean Bottom Seismometer continuous seismic processed data / SEGY data format
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Henstock, Timothy J | |||
| 2 | Binary Object | Binary | Henstock, Timothy J | |||
| 3 | Binary Object (Media Type) | Binary (Type) | Henstock, Timothy J | |||
| 4 | Binary Object (MD5 Hash) | Binary (Hash) | Henstock, Timothy J | |||
| 5 | Binary Object (File Size) | Binary (Size) | Bytes | Henstock, Timothy J | ||
| 6 | File content | Content | Henstock, Timothy J | Ocean bottom seismometer (OBS) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC) * Processing Level: PANGAEA data processing level 3 (ProcLevel3)
Size:
272 data points