Side scan sonar showing the a sunken oil/gas platform & derrick in the northern Gulf of Mexico. #archaeology #sonar

«Los artistas de Sónar de Día que han cancelado son ABADIR; Akyute & Alice Sparkly Kat; ANCIENT PLEASURE; Animistic Beliefs & Jeisson Drenth; Dania + Mau Morgó; DjSport; Emma dj; Forensis & Bill Kouligas, y dj g2g.

»También lo han hecho Heith, James K, Günseli Yalcinkaya & Andrea Belosi; Juliana Huxtable; KEBRA; Le Motel; NEW YORK; Nexus (B4mba & Mooki6); patten; Sara Persico & Mika Oki; Shannen SP; Shapednoise & Sevi Iko D*mochevsky; Sofia; Vica Pacheco; Ville Haimala, y YESSi PERSE + laSADCUM.

»De Sónar de Noche lo han hecho EYRA; oma totem; DJ Paca; DJ SOSA RD, y Tiyumii, así como también se han visto afectadas actividades del Sónar+D como la Universitat Pompeu Fabra y expositores del Project Area.»

28 artistas cancelan su participación en el Sónar por su vinculación con el fondo KKR

#Sonar
#KKR

https://www.europapress.es/catalunya/noticia-28-artistas-cancelan-participacion-sonar-vinculacion-fondo-kkr-20250529200324.html

1/4 #Perplexity API Deep Dive with CTO Denis Yarats - Technical Overview

Join #PerplexityAI Co-founder & #CTO Denis Yarats for a comprehensive overview of #Sonar #API on April 24, 2025, 8:00 PM CEST. #ai

https://bit.ly/4jPDAxX

#APIdev

Side scan sonar mosaic showing an exposed pipeline in the northern Gulf of Mexico. #sonar #geophysical #archaeology

Random Old Comic: Improvised Weaponry https://www.toyboxcomix.com/2018/12/28/improvised-weaponry/ Improvised Weaponry #Jetstorm #Megatron #OptimusPrime #Runway #Sonar #Stormcloud #Transformers #Visper #Whisper

Development and evaluation of an "ultrasonic visor" for enhancing navigation and mobility among visually impaired individuals on Lima, Peru https://link.springer.com/chapter/10.1007/978-981-96-0426-5_3 #sonar #ICOMTA2024

Sonar of a sunken 11.2 m long wooden barge in a southwest Louisiana waterway. #Shipwrecks #sonar #archaeology

Setting The Stage For #OpenSource #Sonar Development https://hackaday.com/2025/01/24/setting-the-stage-for-open-source-sonar-development/

We got a new paper (Led by Ole Sørensen) out! Outlining a new #seafloor #habitat management workflow, integrating the awesome capabilities (cm-scale resolution) synthetic aperture #sonar now brings to #ecological mapping of #marine biomes.
https://zslpublications.onlinelibrary.wiley.com/doi/full/10.1002/rse2.70002

Unknown side scan sonar contact in a South Carolina river. It measures 41 ft long & ~11 ft wide. It could a shipwreck, but there were no magnetometer readings associated with it. #archaeology #sonar

A school of porpoises playing tag with the side scan sonar instrument. The straight to curve lines represent porpoises darting in & out as they attempt to touch the sonar fish. A clear sonar reflection of one is in the lower right corner. #sonar #survey #archaeology

Side scan sonar of a shipwreck on the bottom of a Livingston Parish, LA, waterway. Based on the sonar program it measures approximately 7.72 m (25.33 ft) long by 2.60 m (8.53 ft) wide. The shape is similar to a small river launch with rounded stern. #shipwrecks #archaeology #sonar

Side scan sonar in the northern Gulf of Mexico showing schools of fish. A few of the fish are represented by dark dots, with the majority seen as short to long shadows (white) depending on how high they were in the water column.

Why tag archaeology? We have to evaluate every sonar contact to determine whether it is or potentially is a shipwreck, modern debris, natural feature or plant/animal so the government reviewer doesn't say, "You missed something."
#sonar

#archaeology

#geophysical

Apparently bats hunt moths using sonar, but moths have evolved sonar-jamming techniques that make them invisible to bats, but bats have evolved counter-jamming techniques to make moths visible, and all of this sonar war happened long long before humans stumbled upon these same techniques for radar:

"The jamming of bat sonar by certain tiger moth species has been confirmed. This can be seen as nature's equivalent of radar jamming. Similar to human ECCM techniques, bats are found to change their emission lengths to defeat jamming."

https://en.wikipedia.org/wiki/Radar_jamming_and_deception#Jamming_in_nature

Side scan #sonar of a sunken watercraft & log in a waterway near New Orleans (Saltus & Green in Pearson et al. 2007). The watercraft was tentatively identified as one of Higgins' boats. Higgins designed several different boats besides the famous beach landing craft. #boats #shipwrecks #archaeology

In 1912, Reginald Fessenden demonstrated the first successful sonar. #Poetry #Science #History #Electrodynamics #Sonar #Fessenden (https://sharpgiving.com/thebookofscience/items/p1912b.html)

Northern elephant #seals use deep-sea research #sonar as dinner bell https://phys.org/news/2024-09-northern-elephant-deep-sea-sonar.html

#DeepSea observatory provides insights into the behavior at depth of sub-adult male northern #ElephantSeals, Mirounga angustirostris: Héloïse Frouin-Mouy et al. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0308461

"The seals appeared to use this sound to locate an area with prey and may take advantage of #fish disturbed by the camera lights, particularly targeting #sablefish, their preferred meal, as seen in the video footage"

Imaging Below The Surface Reveals One Of Los Angeles's Webs Of Faults
--
https://phys.org/news/2024-07-imaging-surface-reveals-los-angeles.html <-- shared technical article
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https://doi.org/10.1029/2023AV001155 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #sonar #model #modeling #engineeringgeology #geophysics #geology #earthquake #fault #faulting
#risk #hazard #spatialanalysis #LosAngles #California #USA #slip #PalosVerdesFault #seismology #seismic #earthquakeengineering #displacement #offset #fluids #water #hydrology #propogation #seismichazard #naturalhazards