AndreaBozzo/ceres-open-data-index huggingface dataset:
High-resolution lidar data for infrastructure corridors, Tanana Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. Lake polygons represent areas of water bodies (excluding streams and rivers) > 150 square meteres, present at the time of lidar data collection.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar lake polygons, proposed natural gas pipeline, remote sensing, shaded relief, state of, tanana quadrangle, topographic map, trans-alaska pipeline
Organization: State of Alaska
Pilgrim Hot Springs CSAMT measurements, Seward Peninsula, Alaska

Pilgrim Hot Springs is in the Seward Peninsula, western Alaska, approximately 60 road miles north of Nome. Pilgrim Hot Springs has reported surface temperatures ranging from 145 degrees F to 160 degrees F (63 degrees C-71 degrees C) (Miller and others, 1973; Motyka and others, 1983). Due to the proximity to a large community, Pilgrim Hot Springs is considered a potential resource for providing power or direct-use heat. As a pilot study to inform ongoing investigation of the subsurface geology of Pilgrim Hot Springs, DGGS staff collected 29 controlled source and natural source audio magnetotelluric (CSAMT) readings to develop resistivity models of the study area. This data release provides Stratogem format raw data and resistivity models and depth slice grids in ASCII text and GeoTIFF format. The data, as well as additional metadata, are available from the DGGS website: http://doi.org/10.14509/30472.

Tags: energy, energy resources, engineering, engineering geology, geology, geophysics, geophysics search tag, geothermal, hot springs, hydrology, kougarok mining district, modeling, seward peninsula
Organization: State of Alaska
Tsunami inundation maps for the communities of Chignik and Chignik Lagoon, Alaska

Potential tsunami hazard for the Alaska Peninsula communities of Chignik and Chignik Lagoon is evaluated by numerically modeling the extent of inundation from tsunami waves generated by hypothetical earthquake sources. Worst-case hypothetical scenarios are defined by analyzing results of a sensitivity study of the tsunami dynamics related to various slip distributions along the Alaska-Aleutian megathrust. The worst-case scenarios for Chignik area communities are thought to be thrust earthquakes along the Alaska Peninsula with their greatest slip at 5-35 km (3.1-22 mi) depth. We also consider Tohoku-type ruptures and an outer-rise rupture along the Alaska Peninsula. The maximum predicted water depth on Anderson Street in Chignik Bay is about 31 m (102 ft), while the water depth on Henry Street in Chignik Lagoon is about 11 m (36ft). Maximum current velocity in the ocean could exceed 9 m/s (17 kt) and significant wave action could continue for at least 8 hours after the earthquake. Results presented here are intended to provide guidance to local emergency management agencies in tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards.

Tags: active fault, alaska peninsula, chignik, chignik lagoon, coastal, coastal and river hazards, earthquake, earthquake related hazards, emergency preparedness, engineering geology, fault displacement, faulting, flood, geologic hazards, hazards, inundation, land subsidence, modeling, raster image, seismic gap, seismic hazards, tsunami
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Bettles Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. This digital surface model (mean_DSM) represents mean above-ground height of vegetation returns.

Tags: alaska, alaska highway corridor, alaska pipeline, bettles quadrangle, digital surface model (dsm), gasline, geomorphology, lidar, mean vegetation elevation (dsm), proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline, vegetation metric
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Big Delta Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The dataset represents ground-classified laser returns from the lidar survey and their associated geospatial coordinates.

Tags: alaska, alaska highway corridor, alaska pipeline, big delta quadrangle, gasline, geomorphology, lidar, lidar las file format, point cloud data, proposed natural gas pipeline, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Mount Hayes Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. Lake polygons represent areas of water bodies (excluding streams and rivers) > 150 square meteres, present at the time of lidar data collection.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar lake polygons, mount hayes quadrangle, proposed natural gas pipeline, remote sensing, shaded relief, state of, topographic map, trans-alaska pipeline
Organization: State of Alaska
Tsunami inundation maps for the city of Sand Point, Alaska

Staff from Alaska Earthquake Center, Geophysical Institute and Alaska Division of Geological & Geophysical Surveys evaluated potential tsunami hazards for the city of Sand Point, on Popof Island in the Shumagin Islands archipelago. We numerically modeled the extent of inundation from tsunami waves generated by local and distant earthquake sources. We considered the results in light of historical observations. The worst-case scenarios are defined by analyzing results of the sensitivity study of the tsunami dynamics with respect to different slip distributions along the Aleutian megathrust. For the Sand Point area, the worst-case scenarios are thought to be thrust earthquakes in the Shumagin Islands region with magnitudes ranging from Mw 8.8 to Mw 9.0. We additionally consider a Mw 9.0 rupture between Shumagin Islands and Kodiak Island, a Mw 9.0 rupture of the Cascadia subduction zone, and a Mw 8.6 outer-rise rupture in the area of the Shumagin Islands. Conducted numerical experiments reveal that a tsunami might start to arrive to Sand Point in about 15 minutes after the earthquake with a strong positive wave reaching in 1 hour the height of 7-8 m (23-26 ft) with respect to the pre-earthquake sea level. Consecutive waves might have the same of height or even be higher. The highest predicted wave height is 12-14 m (39-46 ft); a vertical difference between the trough and crest could be as much as 16 m (53 ft) and a time period between the water withdrawal and runup could be as short as 15 minutes. At least three devastating waves can reach the community in the first 2.5 hours after the earthquake. The first wave may not be the highest; the later waves might be more damaging and produce larger inundation. Results from the numerical modeling are intended to provide guidance to local emergency management agencies in tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards. Users can access the complete report and digital data from the DGGS website: http://doi.org/10.14509/29706.

Tags: active fault, alaska earthquake 1964, aleutian islands, bathymetry, coastal, coastal and river, earthquake, emergency preparedness, engineering, engineering geology, fault displacement, faulting, faults, flood, geologic hazards, geology, hazards, holocene, humboldt harbor, inundation, land subsidence, modeling, popof island, raster image, sand point, seismic gap, seismic hazards, seismology, shumagin islands, surface, topography, tsunami, water
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Gulkana Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (light detection and ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The digital surface model represents percent canopy cover (between 0 and 1). Cover metric was computed in Fusion (McGaughey 2007), which assesses the percentage of total first returns within each cell that were returned from the canopy. For more specifics on Fusion Gridmetric outputs see the fusion manual (page 56).

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, gulkana quadrangle, lidar, lidar canopy cover, pipeline, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
Photogrammetric digital surface models and orthoimagery for the continuous coastline, Wales to Platinum, Alaska, segment O: Eek to Goodnews Bay

Aerial photographs of the coastline from Eek to Goodnews Bay were collected on May 4, 2016 - May 5, 2016. The photographs were processed using Structure-from-Motion (SfM) photogrammetric techniques. Global Positioning System (GPS) checkpoints were collected via a Global Navigation Satellite System (GNSS) survey conducted between August 15 and September 14, 2015. For the purposes of open access to elevation and orthoimagery datasets in coastal regions of Alaska, this collection is being released as a Raw Data File with an open end-user license. Orthoimages contain 4-band, 8-bit, unsigned raster data (red/green/blue/no data; file format-GeoTIFF; source-Fairbanks Fodar) with 20 cm GSD. No-data values are found in band 4 or shown as transparent in red/green/blue images. The file employs Lempel-Ziv-Welch (LZW) compression. Light exposures in the orthoimages are a result of daily weather conditions, which ranged from low cloud cover, rain, and full sun.

Tags: coastal, coastal and river, eek, engineering, engineering geology, environmental, geologic hazards, geology, geomorphology, goodnews bay, hazards, marine geology, methods, raster image, surficial
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Talkeetna Mountains Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The dataset represents ground-classified laser returns from the lidar survey and their associated geospatial coordinates.

Tags: alaska, alaska highway corridor, alaska pipeline, gasline, geomorphology, lidar, lidar las file format, point cloud data, proposed natural gas pipeline, remote sensing, state of, talkeetna mountains quadrangle, trans-alaska pipeline
Organization: State of Alaska
Tsunami inundation maps of Whittier and western Passage Canal, Alaska

The purpose of this study is to evaluate potential tsunami hazards for the community of Whittier and western Passage Canal area. We numerically model the extent of inundation due to tsunami waves generated from earthquake and landslide sources. Tsunami scenarios include a repeat of the tsunami triggered by the 1964 Great Alaska Earthquake, as well as tsunami waves generated by a hypothetically extended 1964 rupture, a hypothetical Cascadia megathrust earthquake, hypothetical earthquakes in Prince William Sound, and Kodiak asperities of the 1964 rupture. Local underwater landslide and rockslide events in Passage Canal are also considered as credible tsunamigenic scenarios. Results of numerical modeling combined with historical observations in the region are intended to provide guidance to local emergency management agencies in tsunami hazard assessment, evacuation planning, and public education for reducing future tsunami damage.

Tags: active fault, alaska earthquake 1964, bathymetry, coastal, coastal and river, earthquake, earthquake related slope failure, emergency preparedness, engineering, engineering geology, fault displacement, faulting, faults, flood, geologic hazards, geology, holocene, landslide, modeling, passage canal, rock avalanche, rockfall, seismic hazards, slides, slope, slope instability, tides, tsunami, volcanoes, whittier
Organization: State of Alaska
Trace-element geochemical data from stream sediments collected in the Tok River area, Tanacross A-5 and A-6 quadrangles, Alaska in 2016

In 2016, geologists from the Alaska Division of Geological & Geophysical Surveys (DGGS) and University of Alaska Fairbanks carried out a two-part geologic mapping and geochemical sampling project in the Tok River area of the Tanacross A-5 and A-6 quadrangles (June 12-26 and July 8-26). This report provides results of stream-sediment sampling for trace-element geochemistry. An initial suite of sediment samples was collected from streams draining known gold occurrences, including the Stibnite Creek and Noah prospects, and numerous prospects in the White Gold area. These samples were split in half and the two splits were sieved to -200 mesh and -80 mesh, respectively. The splits were then both analyzed to determine which size fraction was best for identifying gold anomalies in this part of the Alaska Range. In most samples, the -200 mesh fraction showed higher gold levels, and hence, all additional samples we collected were analyzed at -200 mesh. In some -80 mesh samples, gold and tungsten appear to show "nugget" effects not seen in the -200 mesh samples. The other trace elements are largely equivalent between the two mesh sizes. The second suite of samples was collected throughout the map area from streams draining color anomalies, from areas where DGGS mapping identified igneous rocks upstream, and from areas with suspected potential for base-metal or gold mineralization. Highlights of the analytical results include two samples draining the Noah prospect with greater than 1 part per million gold. The analytical data tables associated with this report are available in digital format as comma-separated value (CSV) files.

Tags: analyses, analyses and sampling, analytical lab results, analytical results, chemistry, dall prospect, delta mineral belt, eagle prospect, economic geology, exploration, geochemical data, geochemical surveys, geochemistry, geology, gold, heavy metals, jacqueline prospect, lab methods, metals, mineral assessment, mineral deposit, mineral localities, mineral prospect, mineral resources, placer, placer gold, precious metals, shalosky prospect, statemap project, stream sediments, tanacross quadrangle, tok, tok mining district, tok river, trace elements, trace geochemical, trace metals
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Healy Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The normalized digital surface models (nDSM) represent the above ground elevation of the highest laser return with all vegetation included.

Tags: alaska, alaska highway corridor, alaska pipeline, data normalized digital surface model (ndsm), gasline, geomorphology, healy quadrangle, lidar, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Philip Smith Mountains Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. The normalized digital surface models (nDSM) represent the above ground elevation of the highest laser return with all vegetation included.

Tags: alaska, alaska highway corridor, alaska pipeline, data normalized digital surface model (ndsm), gasline, geomorphology, lidar, philip smith mountains quadrangle, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska
Updated tsunami inundation maps for Homer and Seldovia, Alaska

We re-evaluate the potential tsunami hazard for the communities of Homer and Seldovia by numerically modeling the extent of inundation from tsunami waves generated by earthquakes and submarine landslides. Hypothetical worst-case scenarios are defined by analyzing the tsunami dynamics related to various plausible earthquake slip distributions along the Alaska-Aleutian megathrust. Potential tsunami sources include megathrust earthquakes in the Prince William Sound, Kenai Peninsula, and Kodiak Island regions. We consider scenarios similar to that of the 2011 Tohoku earthquake in Japan, with maximum slip located on a shallow portion of the plate interface close to the seafloor trench. We also consider local underwater slope failure scenarios for Kachemak Bay. The maximum predicted wave height from a tectonic tsunami is 10-12 m (33-40 ft) in Homer and 10-11 m (33-36 ft) in Seldovia, while the maximum landslide-generated tsunami may reach an elevation of up to 4 m (13 ft) on Homer Spit. In addition to Homer and Seldovia, we assessed the tsunami hazard for three small communities in Kachemak Bay: Seldovia Village, Jakolof Bay, and Kachemak Selo. Results presented here are intended to provide guidance to local emergency management agencies for tsunami inundation assessment, evacuation planning, and public education to mitigate future tsunami hazards. This report updates the previous assessment of tsunami hazard for Homer and Seldovia published in 2005. Version 2 provides expanded coverage of Seldovia shoreline. The complete report and digital data are available from the DGGS website: http://doi.org/10.14509/30095.

Tags: bathymetry, coastal, cook inlet, earthquake, earthquake related slope failure, engineering, engineering geology, faults, flood, geologic, geologic hazards, geological process, geology, geotechnical, hazards, homer, jakolof bay, kachemak bay, kachemak selo, kenai peninsula, landslide, seldovia, seldovia village, slides, slope, slope instability, slump, subduction, subsidence, surface, tectonics, topography, tsunami, uplift, water
Organization: State of Alaska
High-resolution lidar data for infrastructure corridors, Nabesna Quadrangle, Alaska

In advance of design, permitting, and construction of a pipeline to deliver North Slope natural gas to out-of-state customers and Alaska communities, the Division of Geological & Geophysical Surveys (DGGS) has acquired lidar (Light Detection and Ranging) data along proposed pipeline routes, nearby areas of infrastructure, and regions where significant geologic hazards have been identified. Lidar data will serve multiple purposes, but have primarily been collected to (1) evaluate active faulting, slope instability, thaw settlement, erosion, and other engineering constraints along proposed pipeline routes, and (2) provide a base layer for the state-federal GIS database that will be used to evaluate permit applications and construction plans. Bare-earth digital elevation models (DEM) represent the earth's surface with all vegetation and human-made structures removed.

Tags: alaska, alaska highway corridor, alaska pipeline, bare-earth digital elevation model (dem), gasline, geomorphology, lidar, nabesna quadrangle, proposed natural gas pipeline, raster image, remote sensing, state of, trans-alaska pipeline
Organization: State of Alaska