The Hunga Tonga-Hunga Ha'apai (HTHH) volcanic eruption in January 2022 generated catastrophic tsunami and contends for the largest natural explosion more than a century. main island, Tongatapu, suffered waves up to 17 m, Tofua Island 45 comfortably placing HTHH "megatsunami" league. We present simulation of Tongan Archipelago calibrated by field observations, drone, satellite data. Our emphasizes how complex shallow bathymetry area acted as low-velocity wave trap, capturing 1 hour. Despite...

The topography of Mt. Etna, Italy, is subjected to continuous modifications depending on intensity and magnitude eruptions that frequently occur at the volcano summit flanks. In order make high-resolution maps morphological changes accurately calculate overall volume erupted products (e.g., lava flows, tephra fall out, scoriae cones) in ten years, we have compared altimetry models Etna derived from 2005 Airborne Laser Scanning data 2015 Pleiades stereo satellite imagery. Both cover a common...

We developed the first-ever bathymetric module for NASA Ames Stereo Pipeline (ASP) open-source topographic software called Satellite Triangulated Sea Depth, or SaTSeaD, to derive nearshore bathymetry from stereo imagery. Correct measurements depend on water surface elevation, and whereas previous methods considered horizontal, our accounts curvature of Earth in The process is semiautomatic, reliable, repeatable, independent any external data eliminating user bias selecting calibration...

Palaseanu-Lovejoy, M.; Danielson, J.; Thatcher, C.; Foxgrover, A.; Barnard, P.; Brock, J., and Young, A., 2016. Automatic delineation of seacliff limits using lidar-derived high-resolution DEMs in Southern California. In: J.C.; Gesch, D.B.; Parrish, C.E.; Rogers, J.N., Wright, C.W. (eds.), Advances Topobathymetric Mapping, Models, Applications. Journal Coastal Research, Special Issue, No. 76, pp. 162–173. Coconut Creek (Florida), ISSN 0749-0208.Seacliff erosion is a serious hazard with...

Abstract. We describe a new algorithm that automatically delineates the cliff top and toe of cliffed coastline from digital elevation model (DEM). The builds upon existing methods but is specifically designed to resolve very irregular planform coastlines with many bays capes, such as parts Great Britain. sequentially smooths shoreline vectors, generates orthogonal transects profiles minimum spacing equal DEM resolution, extracts position toe. Outputs include non-smoothed raster smoothed...

Thatcher, C.A.; Brock, J.C.; Danielson, J.J.; Poppenga, S.K.; Gesch, D.B.; Palaseanu-Lovejoy, M.E.; Barras, J.A.; Evans, G.A., and Gibbs, A.E., 2016. Creating a Coastal National Elevation Database (CoNED) for science conservation applications. In: Parrish, C.E.; Rogers, J.N., Wright, C.W. (eds.), Advances in Topobathymetric Mapping, Models, Applications. Journal of Research, Special Issue, No. 76, pp. 64–74. Coconut Creek (Florida), ISSN 0749-0208.The U.S. Geological Survey is creating the...

We assessed the nature and spatial temporal patterns of deformation over Miami Park bluffs on eastern margin Lake Michigan investigated factors controlling its observed deformation. Our approach involved following steps: (1) extracting bluff rates (velocities along line sight satellite) using a stack Sentinel-1A radar imagery in ascending acquisition geometry acquired between 2017 2021 applying Intermittent Small Baseline Subset (ISBAS) InSAR time series analysis method; (2) generating...

Palaneasu-Lovejoy, M.; Kranenburg, C.; Barras, J.A., and Brock, J.C., 2013. Land loss due to recent hurricanes in coastal Louisiana, U.S.A.. In: J.C.; Williams, S.J. (eds.), Understanding Predicting Change the Coastal Ecosystems of Northern Gulf Mexico, Journal Research, Special Issue No. 63, pp. 97–109, Coconut Creek (Florida), ISSN 0749-0208.The aim this study is improve estimates wetland land two regions U.S.A., extreme storms that impacted region between 2004 2009. The are based on...

Majuro Atoll in the central Pacific has high coastal vulnerability due to low-lying islands, rising sea level, wave events, eroding shorelines, a dense population center, and limited freshwater resources. Land elevation is primary geophysical variable that determines exposure inundation settings. Accordingly, data (with accuracy information) are critical for assessments of exposure. Previous research demonstrated importance using high-accuracy rigorously accounting uncertainty assessments. A...

Circular 1521, a 34-page report by Leonard Pearlstine, Aaron Higer, Monica Palaseanu, Ikuko Fujisaki, and Frank Mazzotti, documents the procedures used in generation of EDEN water stage depth interpolated surfaces. Includes references. Published UF Department Wildlife Ecology Conservation, July 2007. Minor revision September CIR1521/UW278: Spatially Continuous Interpolation Water Stage Depths Using Everglades Depth Estimation Network (EDEN) (ufl.edu)

The areas characterized by dynamic and rapid morphological changes need accurate topography information with frequent updates, especially if these are populated involve infrastructures. This is particularly true in active volcanic such as Mount (Mt.) Etna, located the northeastern portion of Sicily, Italy. Mt. Etna volcano periodically explosive effusive eruptions represents a potential hazard for several thousands local people hundreds tourists present on itself. In this work,...

First posted April 16, 2018 For additional information, contact: Director, Earth Resources Observation and Science CenterU.S. Geological Survey47914 252nd Street Sioux Falls, SD Satellite-derived near-shore bathymetry (SDB) is becoming an increasingly important method for assessing vulnerability to climate change natural hazards in low-lying atolls of the northern tropical Pacific Ocean. Satellite imagery has become a cost-effective means mapping because ships cannot collect soundings safely...

First posted March 30, 2018 For additional information, contact: Eastern Geographic Science Center U.S. Geological Survey Mail Stop 521 12201 Sunrise Valley Drive Reston, VA 20192 Atoll and island coastal communities are highly exposed to sea-level rise, tsunamis, storm surges, rogue waves, king tides, the occasional combination of multiple factors, such as high regional sea levels, extreme local unusually strong wave set-up. The elevation most these atolls averages just under 3 meters (m),...

Flood protection in south Louisiana is largely dependent on earthen levees, and the aftermath of Hurricane Katrina state's levee system has received intense scrutiny. Accurate elevation data along levees are critical to local district managers responsible for monitoring maintaining extensive non-federal coastal Louisiana. In 2012, high resolution airborne lidar were acquired over Lafourche Parish, Louisiana, a mobile terrestrial survey was conducted selected segments using scanner mounted...

The R package iBluff is designed for coastal bluffs/bluffs morphological analysis and offers an automatic reproducible alternative to identify bluff edges using a bare earth digital elevation model (DEM) instead of hand digitizing. This extracts profiles along automatically identified transects on the bluff-face, top, toe, secondary inflections, relative concavity/convexity beach dunes (crests troughs). requires at minimum DEM as raster generalized line shapefile (shoreline) approximately...

This study evaluates the capabilities of Experimental Advanced Airborne Research Lidar (EAARL) in delineating vegetation assemblages Jean Lafitte National Park, Louisiana. Five-meter-resolution grids bare earth, canopy height, canopy-reflection ratio, and height median energy were derived from EAARL data acquired September 2006. Ground-truth collected along transects to assess species composition, cover, ground cover. To decide which model is more accurate, comparisons general linear models...

3D high-resolution Romanian Black Sea – Danube Delta coastal geomorphic surveys for change analysisAndrei Gabriel Dragos1,2, Monica Palaseanu-Lovejoy3, Iordache1,4, Irina Stanciu1, Florin Pitea1,2, Maria Ionescu1,2, Adrian Gherghe1, Stanica11 National Institute Research and Development on Marine Geology Geo-Ecology (GeoEcoMar), Bucharest, Romania2 Faculty of Geophysics, University Romania3 U.S. Geological Survey, Geology, Minerals, Energy Geophysics Science Center, Reston,...