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#geophysical

1 post1 participant0 posts today
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💧🌏 Greg Cocks

Multispectral Remote Sensing Expression of Lineaments and Alteration Minerals in Part of Crystalline Rock Units of Southwestern Nigeria - Implication on Gold Prospecting
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doi.org/10.1016/j.oreoa.2025.1 <-- shared paper
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#GIS #spatial #mapping #ASTER #Gold #Hydrothermal #HydrothermalAlteration #Lineament #Landsat #ETM #EnhancedThematicMapper #phyllic #Ilesha #schist #belt #geology #mining #Nigeria #naturalresources #mineral #mineralresources #golddeposits #aerogeophysical #remotesensing #geophysical #spatialanalysis #geomorphology #geomorphometry #alteration #propylitic #argillic #mineralogy #XRD #structuralgeology #lithology #PrincipalComponentAnalysis #PCA #prospecting #fracture #joints #faulting #Multispectral #Lineaments #Crystalline

aerial oblique image - existing gold mine, Nigeria
geology/geomorphology map - Showing VES Positions Overlay on Mineral Prospective Map
(a) Lineament Map of the Study Area (b) Lineament Density Map of the Study Area (c) Superposition of Lineament on Geology Map of the Study Area
maps of remote sensing data - (a) Composite (RGB) 7, 5, 2 Image of the Study Area (b) Composite (RGB) 3, 2, 1 Image of the Study Area (c) Composite (RGB) 4, 3, 1 Image of the Study Area (d) Composite (RGB) 3, 2, 1 Image of the Study Area
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💧🌏 Greg Cocks

Grfin Tools—User Guide And Methods For Modeling Landslide Runout And Debris-Flow Growth And Inundation
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pubs.usgs.gov/publication/tm14 <-- shared USGS publication
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code.usgs.gov/grfintools/grfin <-- shared USGS software release
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H/T Jonathan Perkins USGS
[ another open source resource for everyone from the USGS ~smile~ ]
#GIS #spatial #mapping #opensource #openlibrary #Grfin #software #package #regional #debrisflow #engineeringgeology #geology #inundation #spatialanalysis #spatiotemporal #geophysics #geophysical #massmovement #landslide #lahar #volcano #rock #avalanche #model #modeling #statistical #geostatistics #water #hydrology #downstream #elevation #remotesensing #DEM #flow #runout #risk #hazard #tools #slope #erosion #drainage #network #channel #channelisation #userguide
@USGS

screen shot - grfintools software repository home page (https://code.usgs.gov/grfintools/grfintools)
report figure 2 - Schematic flowchart illustrating common pathways for using Grfin Tools with examples identified in orange boxes
report figure 1 - Perspective view of topography illustrating the potential locations for three types of mass movements that can be derived from a Grfin Tools analysis.
USGS report cover page - Grfin Tools—User Guide And Methods For Modeling Landslide Runout And Debris-Flow Growth And Inundation
Public
💧🌏 Greg Cocks

Large Magma Bodies Found Beneath Dormant Volcanoes, Surprising Scientists
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phys.org/news/2025-01-large-ma <-- shared technical article
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doi.org/10.1038/s41561-024-016 <-- shared paper
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#GIS #spatial #mapping #remotesensing #seismology #seismic #teleseismic #magma #volcano #vulcanism #geophysics #geophysical #geology #structuralgeology #crust #hotspot #PNW #PacificNorthwest #MountRainer #MountSaintHelens #eruption #dormant #Cascades #CascadeRange #spatialanalysis #spatiotemporal #MountHood #ThreeSisters #Oregon #Washington #California #NewberryVolcano #CraterLake #MountShasta #LassenPeak #partialmelt #model #modeling #seismicity #earthquake #risk #hazard #active #threat #monitoring #engineeringgeology #EarlyWarningSystem

photo - An ash plume billows from the crater atop Mount St. Helens hours after its eruption began on May 18th, 1980, in Washington State. The column of ash and gas reached 15 miles into the atmosphere, depositing ash across a dozen states
photo - Mount Rainier, a snowcapped volcano, looms over Puyallup Valley near Orting, Washington. The prospect of a lahar — a swiftly moving debris flow caused by melting snow and ice typically during a volcanic eruption — poses a threat to surrounding communities.
maps/charts - Back-projected P–S conversions with phase polarities and geographical location determination of the Vs reduction bodies
cross sections - Possibilities of partial melts beneath each volcano
Public
💧🌏 Greg Cocks

Scientists Uncover Evidence Of A Colossal MegaFlood That Refilled The Mediterranean Sea
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scitechdaily.com/scientists-un <-- shared technical article
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doi.org/10.1038/s43247-024-019 <-- shared paper
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#GIS #spatial #mapping #remotesensing #Zanclean #megaflood #flood #flooding #Mediterranean #MediterraneanSea #MessinianSalinityCrisis #italy #sicily #spatialanalysis #erosion #geology #engineeringgeology #naturaldisaster #sedimentation #deposition #ridge #morphology #geomorphology #geomorphometry #spatialanalysis #model #deposits #breccia #sediment #softsediment #geologichistory #seismology #geophysics #seismics #geophysical #pleistocene #hydrodynamic #model #water #hydrology

charts, photo & map - Ridge morphology
photo and 3D image/map - ridge outcrops
image - artistic interpretation of the flooding of the Mediterranean through the Strait of Gibraltar (A) and the Strait of Sicily (F) about 5.3 million years ago
seismic profiles and map - Buried erosional shelf channels upslope of Noto Canyon
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Snowshadow 🇨🇦

Satellite map of North America's largest glacier shows 'hidden lagoon' and other secrets
"NASA has released a trippy, technicolor satellite photo of Alaska's Malaspina Glacier, which makes the massive ice mass look like a fiery, rippling blob of paint. The new image highlights recent discoveries at the glacier, including a "hidden lagoon"

#nasa #glacier #subglacial #alaska #satellite #space #science #astronomy #geophysicalresearch #geophysical #research #news
space.com/largest-glacier-hidd

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Space · Satellite map of North America's largest glacier shows 'hidden lagoon' and other secretsBy Harry Baker
Continued thread
Public
Nonilex

…The #earthquake was the biggest to hit #Morocco in 120yrs, toppling bldgs & walls in ancient cities made from stone & masonry not designed to withstand quakes.

“…where destructive earthquakes are #rare, bldgs are simply not constructed…to cope…, so many collapse resulting in high #casualties. …expect the final death toll to climb to thousands…. #aftershocks are likely, which will lead to further #casualties & hinder #SearchAndRescue,” Bill McGuire, prof of #geophysical & #Climate #Hazards UCL.

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