Reclaiming the Land

Lava floods human-made infrastructure on Iceland’s Reykjanes peninsula in this aerial image from photographer Ael Kermarec. Protecting roads and buildings from lava flows is a formidable challenge, but it’s one that researchers are tackling. But the larger and faster the lava flow, the harder infrastructure is to protect. Sometimes our best efforts are simply overwhelmed by nature’s power. (Image credit: A. Kermarec/WNPA; via Colossal)

Kinematic Evolution Of A Large Paraglacial Landslide In The Barry Arm Fjord Of Alaska
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https://doi.org/10.1029/2023JF007119 <-- shared paper
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https://doi.org/10.5066/P9EUCGJQ <-- shared technical article
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https://www.sciencebase.gov/catalogMaps/mapping/ows/5fff561ed34e592d8671ee85?service=wms&request=getcapabilities&version=1.3.0 <-- shared web mapping service
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#GIS #spatial #mapping #massmovement #landslide #engineeringgeology #remotesensing #sitespecific #LiDAR #iFSAR #paraglacial #kinematics #mapping #monitoring #spatialanalysis #spatiotemporal #fedscience #risk #hazard #glacier #retreat #climatechange #Alaska #BarryArm #fjord #hazardassessment #tsunami #wave #BarryGlacier #change #sensors #fieldwork #surveillance #melting #permafrost #Whittier #geophysics #geology #geomorphometry #deglaciating
@USGS

European Geological Open Data (Map And Data) From The European Geological Data Infrastructure (EGDI)
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https://www.europe-geology.eu/data-tools/map-viewer/ <-- shared link to map viewer
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#geology #geosciences #earthsciences #data #spatialdata #criticalminerals #mining #geothermal #netzero #groundwater #carboncapture #ccs #GIS #spatial #mapping #opendata #webmapping #mapportal #Europe #EGDI #framework #GSEU #resources #naturalresources #opendata #water #naturalresources #geomorphology #bathymetry #geophysics #topobathy #remotesensing #earthobservation #waterresources

For more insight into the tectonic background of today’s M7.7 #earthquake in Myanmar I’d recommend this blog post and the original article on extrusion tectonics. There is also a video hiding somewhere on YouTube that illustrates this experiment perfectly.
#myanmar #geology #geoscience #tectonics #geophysics
https://blogs.egu.eu/divisions/ts/2021/02/15/ts-must-read-tapponnier-et-al-1982-propagating-extrusion-tectonics-in-asia/

Slipping Ice Streams

The Northeast Greenland Ice Stream provides about 12% of the island’s annual ice discharge, and so far, models cannot accurately capture just how quickly the ice moves. Researchers deployed a fiber-optic cable into a borehole and set explosive charges on the ice to capture images of its interior through seismology. But in the process, they measured seismic events that didn’t correspond to the team’s charges.

Instead, the researchers identified the signals as small, cascading icequakes that were undetectable from the surface. The quakes were signs of ice locally sticking and slipping — a failure mode that current models don’t capture. Moreover, the team was able to isolate each event to distinct layers of the ice, all of which corresponded to ice strata affected by volcanic ash (note the dark streak in the ice core image above). Whenever a volcanic eruption spread ash on the ice, it created a weaker layer. Even after hundreds more meters of ice have formed atop these weaker layers, the ice still breaks first in those layers, which may account for the ice stream’s higher-than-predicted flow. (Image credit: L. Warzecha/LWimages; research credit: A. Fichtner et al.; via Eos)

Salt Affects Particle Spreading

Microplastics are proliferating in our oceans (and everywhere else). This video takes a look at how salt and salinity gradients could affect the way plastics move. The researchers begin with a liquid bath sandwiched between a bed of magnets and electrodes. Using Lorentz forcing, they create an essentially 2D flow field that is ordered or chaotic, depending on the magnets’ configuration. Although it’s driven very differently, the flow field resembles the way the upper layer of the ocean moves and mixes.

The researchers then introduce colloids (particles that act as an analog for microplastics) and a bit of salt. Depending on the salinity gradient in the bath, the colloids can be attracted to one another or repelled. As the team shows, the resulting spread of colloids depends strongly on these salinity conditions, suggesting that microplastics, too, could see stronger dispersion or trapping depending on salinity changes. (Video and image credit: M. Alipour et al.)

Daily report

Here are today's most popular trending hashtags on our website ️:

#cosmos, #science, #wonder, #space, #linuxgaming, #gaming, #geophysics, #ubuntu, #steam, #astrophotography, #unix

Stay tuned!

Earth's inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that reshapes our understanding of the planet's heartbeat. #Science #Geophysics

Earth's inner core may have stopped spinning—and could now be reversing its spin. A cyclical phenomenon that happens every few decades, reshaping our understanding of the planet's heartbeat. #Science #Geophysics

Earth’s inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that happens every few decades, it’s a reminder of how little we truly know about the heart of our planet. #Science #Geophysics

"Earth's inner core may have stopped spinning—and could now be reversing its spin. A cyclical phenomenon that reshapes our understanding of the planet's heartbeat. #Geophysics #Science"

Earth’s inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that rewrites what we know about our planet’s heartbeat. #Science #Geophysics

Earth's inner core may have stopped spinning—and now it's reversing. A cyclical phenomenon that happens every few decades, reshaping our understanding of the planet's heartbeat. #Science #Geophysics

"Earth’s inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that reshapes our understanding of the planet’s heartbeat. #Science #Geophysics"

"Earth's inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that reshapes our understanding of the planet's heartbeat. #Science #Geophysics"

Earth's inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that reshapes our understanding of the planet's heartbeat. #Science #Geophysics

Earth's inner core may have stopped spinning—and could now be reversing its spin. A cyclical phenomenon that reshapes our understanding of the planet's heartbeat. #Science #Geophysics

Earth’s inner core may have stopped spinning—and could now be reversing its direction. A cyclical phenomenon that happens every few decades, it’s a reminder of how little we truly know about the dynamic heart of our planet. #Science #Geophysics

Earth's inner core may have stopped spinning—and could now be reversing its spin. A cyclical phenomenon that rewrites what we know about our planet's heartbeat. The question is: what does this mean for Earth's future? #Geophysics #Science

Flooding the Mediterranean

Nearly 6 million years ago, the Mediterranean was cut off from the ocean and evaporated faster than rivers could replenish it. This created a salty desert that persisted until about 5.3 million years ago. One hypothesis — the Zanclean megaflood — suggests that the Mediterranean refilled rapidly through an erosion channel near the Strait of Gilbraltar. A new study bolsters the concept by identifying geological features near Sicily consistent with the megaflood.

The team point to a grouping of over 300 ridges near the Sicily Sill, once a land bridge dividing the eastern and western Mediterranean and now underwater. The ridges are layered in debris but aren’t streamlined, suggesting they were rapidly deposited by turbulent waters, and date to the period of the proposed flooding. For more on the Zanclean Flood, check out this older post. (Image credit: R. Klavins; research credit: A. Micallif et al.; via Gizmodo)