GeoAcoustics Ltd’s Post

The #map displays the Cascadia subduction zone #offshore Oregon, indicating #seismic line 15 from cruise RR1718. Red stars mark Site 174 from DSDP Leg 18 and Site 892 from ODP Leg 146. Water depths range from 3,000 to 0-m at the #coastline. The #bathymetry uses the Global Multi-Resolution Topography (GMRT) database. Another map shows the eastern half of seismic line 15, featuring the head scarp from the 44-N slide, a debris field with large blocks, and an interpreted in situ deformation zone. Water depths range from 3,000 to 1,300-m. The bathymetry uses the GMRT database. Panel (c) provides a detailed view of the main head scarp, evacuation zone, blocks within the debris field, and frontal deformation zone. Panel (d) offers a close-up of the deformation zone, characterized by thrust faults, folding, and drape layers indicating in situ deformation from the landslide impact. Adapted from Lenz et al., (2019). A recent study by The Ohio State University has revealed a novel method for determining the velocity of past #underwater landslides, focusing on the 44-N Slide off the Oregon #coast within the Cascadia Subduction Zone (CSZ). The CSZ, known for powerful #earthquakes, can lead to underwater #landslides and subsequent #tsunamis. The study examined the 44-N Slide, uncovering that it covered a horizontal distance of 10 kilometers with a 13-degree slope, dropping 1,200 meters. The impact on the #seafloor occurred at a velocity of 60 meters per second, suggesting a potentially "tsunamigenic" event. Published in Geophysical Research Letters, the research underscores the significance of understanding underwater landslides to mitigate the associated #tsunami risks, emphasizing the need for improved seafloor imaging technologies. These findings contribute not only to the protection of coastal communities but also to the preservation of underwater #cables and the formulation of effective emergency response plans. Supported by the National Science Foundation, the study's insights offer a global perspective, and the methodology developed can be valuable for researchers modeling underwater landslide deformation zones in different parts of the world. 🔎🌊⚠️ [Lenz, B. L., Griffith, W. A., & Sawyer, D. E. (2023). Impact-induced seafloor deformation from #submarine landslides: Diagnostic of slide velocity? Geophysical Research Letters, 50, e2023GL104818. https://lnkd.in/dkjjryb4]

Getting good geophysical data sometimes means choppering in equipment and hiking up a hillside! Here the GEOVision field crew conducts an acoustic televiewer survey to support a slope stability project. #geovision#acousticteleviewer#fieldgeophysics

📃 New publication 📃 "Analysis of protected species observer data: Strengths, weaknesses, and application in the assessment of marine mammal responses to seismic surveys in the northern Gulf of Mexico 2002–2015." Overall results are consistent with other studies indicating that marine mammals may avoid exposure to airgun sounds based on observed distance from the seismic source during specified source activities. Check out the full paper here: https://lnkd.in/eyVG9tid

CONTINUATION OF #SEGMENTSOFSURVEYING #GeodeticSurvey: Geodetic surveys uses #advancedtechniques to establish #precisehorizontal and #verticalpositions on the Earth's surface. These surveys employ #satellitebasedpositioningsystems, such as #gps (Global Positioning System), to accurately determine the coordinates of #cadastralcontrolpoints. Geodetic surveys provide a framework for referencing #cadastralboundaries within a broader geographic context. #Happyworldengineeringday #ggil #letslearntogether

Ship stabilizers (or stabilisers) are fins or rotors mounted beneath the waterline and emerging laterally from the hull to reduce a ship’s roll due to wind or waves. Question to ship engineers, how complex is this system? #MaritimeIndustry #Shipping #MarineTechnology #MaritimeInnovation #OceanTransportation #PortsAndTerminals #MarineEngineering #MaritimeLogistics #MaritimeTrade #NavalArchitecture #Seafarers #MaritimeSafety #Oceanography #MaritimeLaw #MarineEnvironment #MaritimeEducation #MaritimeHistory #Shipbuilding #PassionForTheSea

Ship stabilizers (or stabilisers) are fins or rotors mounted beneath the waterline and emerging laterally from the hull to reduce a ship’s roll due to wind or waves. Question to ship engineers, how complex is this system? #MaritimeIndustry #Shipping #MarineTechnology #MaritimeInnovation #OceanTransportation #PortsAndTerminals #MarineEngineering #MaritimeLogistics #MaritimeTrade #NavalArchitecture #Seafarers #MaritimeSafety #Oceanography #MaritimeLaw #MarineEnvironment #MaritimeEducation #MaritimeHistory #Shipbuilding #PassionForTheSea

𝗨𝗻𝗱𝗲𝗿𝘄𝗮𝘁𝗲𝗿 𝗠𝗮𝗽𝗽𝗶𝗻𝗴 𝗦𝗲𝗿𝘃𝗶𝗰𝗲 𝗠𝗮𝗿𝗸𝗲𝘁 𝟮𝟬𝟮𝟰-𝟮𝟬𝟯𝟭. 𝗚𝗹𝗼𝗯𝗮𝗹 𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗥𝗲𝗽𝗼𝗿𝘁 The Underwater Mapping Service market report delivers an extensive analysis, covering global, regional, and country-level market sizing, segmentation growth, market share, competitive landscape, impact of domestic and global players, value chain optimization, trade regulations, recent developments, opportunities analysis, strategic growth assessment, product launches, marketplace expansion, and technological innovations. 𝐓𝐨 𝐊𝐧𝐨𝐰 𝐭𝐡𝐞 𝐆𝐥𝐨𝐛𝐚𝐥 𝐒𝐜𝐨𝐩𝐞 𝐚𝐧𝐝 𝐃𝐞𝐦𝐚𝐧𝐝 𝐨𝐟 𝗨𝗻𝗱𝗲𝗿𝘄𝗮𝘁𝗲𝗿 𝗠𝗮𝗽𝗽𝗶𝗻𝗴 𝗦𝗲𝗿𝘃𝗶𝗰𝗲 𝗠𝗮𝗿𝗸𝗲𝘁. 𝐑𝐞𝐪𝐮𝐞𝐬𝐭 𝐟𝐨𝐫 𝐒𝐚𝐦𝐩𝐥𝐞 𝐏𝐃𝐅: https://lnkd.in/gmG-uGPd *𝗕𝘆 𝗧𝘆𝗽𝗲: Bathymetric Mapping, Subsea Infrastructure Mapping *𝗕𝘆 𝗔𝗽𝗽𝗹𝗶𝗰𝗮𝘁𝗶𝗼𝗻: Environment Protecting, Marine Transportation, Shipping & Navigation, Oceanography, Offshore Energy, Search & Rescue, Others *𝗕𝘆 𝗥𝗲𝗴𝗶𝗼𝗻: North America, Europe, Asia-Pacific, South America, Middle East & Africa *𝗕𝘆 𝗞𝗲𝘆 𝗣𝗹𝗮𝘆𝗲𝗿𝘀: ASI Group, Schmidt Ocean Institute, iSurvey, 3D at Depth, AUS-ROV Brasil, Wӓrtsilӓ Underwater Services, Reef Smart , iXblue Pty Ltd, Survey Specialists, Sonavision Ltd, Leica Geosystems part of Hexagon #subsea #oceanography #hydrography #mapping #geospatial #marineexploration #underwater #underwatermapping #seabedmapping #surveying #oceanresearch #marinebiology #remotesensing #geomatics #bathymetry

A power tool for sure.

A horizontal datum is a reference framework used to accurately measure positions on the Earth’s surface horizontally. It consists of a network of points with known coordinates that are used as reference points for mapping and surveying purposes. The horizontal datum defines the origin and orientation of coordinate systems used for mapping and navigation.

Here is the mechanism of keeping a vessel floating stabilised.