Dataset Name

Okmok Volcano Hazard Assessment

Bibliographic Reference

Beget, J.E., Larsen, J.F., Neal, C.A., Nye, C.J., and Schaefer, J.R., 2005, Preliminary volcano-hazard assessment for Okmok Volcano, Umnak Island, Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 2004-3, 32 p., 1 sheet, scale 1:150,000. https://doi.org/10.14509/7042

Table of Contents

Layer Name: metadata
Layer Description: metadata, codesets, files not associated with a specific layer, or applicable to all layers
/metadata/RI2004-3.faq.html
/metadata/RI2004-3.txt
/metadata/RI2004-3.xml

Layer Name: OKConeA5km_polyline
Layer Description: approximate hazard zone for ballistics from Cone A
/shapefiles/OKConeA5km_polyline.dbf
/shapefiles/OKConeA5km_polyline.prj
/shapefiles/OKConeA5km_polyline.shp
/shapefiles/OKConeA5km_polyline.shx

Layer Name: OKContinuousGPS_point
Layer Description: location of continuous GPS stations
/shapefiles/OKContinuousGPS_point.dbf
/shapefiles/OKContinuousGPS_point.prj
/shapefiles/OKContinuousGPS_point.shp
/shapefiles/OKContinuousGPS_point.shx

Layer Name: OKCraterCrFlood_polyline
Layer Description: approximate limits of Crater Creek Flood hazard zone
/shapefiles/OKCraterCrFlood_polyline.dbf
/shapefiles/OKCraterCrFlood_polyline.prj
/shapefiles/OKCraterCrFlood_polyline.shp
/shapefiles/OKCraterCrFlood_polyline.shx

Layer Name: OKCreeks_polyline
Layer Description: major creeks around Okmok Volcano
/shapefiles/OKCreeks_polyline.dbf
/shapefiles/OKCreeks_polyline.prj
/shapefiles/OKCreeks_polyline.shp
/shapefiles/OKCreeks_polyline.shx

Layer Name: OKDebrisArrows_polyline
Layer Description: arrows showing the approximate location and direction of flow of debris avalanches
/shapefiles/OKDebrisArrows_polyline.dbf
/shapefiles/OKDebrisArrows_polyline.prj
/shapefiles/OKDebrisArrows_polyline.shp
/shapefiles/OKDebrisArrows_polyline.shx

Layer Name: OKDebrisTDA_polyline
Layer Description: mapped boundary of a prehistoric debris avalanche from Tulik Volcano
/shapefiles/OKDebrisTDA_polyline.dbf
/shapefiles/OKDebrisTDA_polyline.prj
/shapefiles/OKDebrisTDA_polyline.shp
/shapefiles/OKDebrisTDA_polyline.shx

Layer Name: OKDebrisTulik_region
Layer Description: approximate hazard zone for debris avalanches
/shapefiles/OKDebrisTulik_region.dbf
/shapefiles/OKDebrisTulik_region.prj
/shapefiles/OKDebrisTulik_region.shp
/shapefiles/OKDebrisTulik_region.shx

Layer Name: OKFlood_region
Layer Description: approximate location of flood and lahar hazards
/shapefiles/OKFlood_region.dbf
/shapefiles/OKFlood_region.prj
/shapefiles/OKFlood_region.shp
/shapefiles/OKFlood_region.shx

Layer Name: OKFtGlennAir_point
Layer Description: location of the Fort Glenn airstrip
/shapefiles/OKFtGlennAir_font_point.dbf
/shapefiles/OKFtGlennAir_font_point.prj
/shapefiles/OKFtGlennAir_font_point.shp
/shapefiles/OKFtGlennAir_font_point.shx

Layer Name: OKHazMapBdry_polyline
Layer Description: outline of the basemap
/shapefiles/OKHazMapBdry_polyline.dbf
/shapefiles/OKHazMapBdry_polyline.prj
/shapefiles/OKHazMapBdry_polyline.shp
/shapefiles/OKHazMapBdry_polyline.shx

Layer Name: OKLatLines_polyline
Layer Description: four 10-minute latitude lines in the map area
/shapefiles/OKLatLines_polyline.dbf
/shapefiles/OKLatLines_polyline.prj
/shapefiles/OKLatLines_polyline.shp
/shapefiles/OKLatLines_polyline.shx

Layer Name: OKLongLines_polyline
Layer Description: four 20-minute longitude lines in the map area
/shapefiles/OKLongLines_polyline.dbf
/shapefiles/OKLongLines_polyline.prj
/shapefiles/OKLongLines_polyline.shp
/shapefiles/OKLongLines_polyline.shx

Layer Name: OKPFsurge_polyline
Layer Description: approximate location of pyroclastic flow and surge hazard zone
/shapefiles/OKPFsurge_polyline.dbf
/shapefiles/OKPFsurge_polyline.prj
/shapefiles/OKPFsurge_polyline.shp
/shapefiles/OKPFsurge_polyline.shx

Layer Name: OKRim15km_polyline
Layer Description: approximate limit of significant ashfall, located 15 kilometers from the caldera rim
/shapefiles/OKRim15km_polyline.dbf
/shapefiles/OKRim15km_polyline.prj
/shapefiles/OKRim15km_polyline.shp
/shapefiles/OKRim15km_polyline.shx

Layer Name: OKRim30km_polyline
Layer Description: approximate maximum extent of pyroclastic flows, sures, and lateral blasts during a very large
/shapefiles/OKRim30km_polyline.dbf
/shapefiles/OKRim30km_polyline.prj
/shapefiles/OKRim30km_polyline.shp
/shapefiles/OKRim30km_polyline.shx

Layer Name: OKSeisStat_point
Layer Description: location of seismic stations
/shapefiles/OKSeisStation_point.dbf
/shapefiles/OKSeisStation_point.prj
/shapefiles/OKSeisStation_point.shp
/shapefiles/OKSeisStation_point.shx

Layer Name: OKroad_polyline
Layer Description: unmaintained dirt roads
/shapefiles/OKroad_polyline.dbf
/shapefiles/OKroad_polyline.prj
/shapefiles/OKroad_polyline.shp
/shapefiles/OKroad_polyline.shx

Layer Name: OKtrail_polyline
Layer Description: unmaintained trails
/shapefiles/OKtrail_polyline.dbf
/shapefiles/OKtrail_polyline.prj
/shapefiles/OKtrail_polyline.shp
/shapefiles/OKtrail_polyline.shx

Supplemental Information

The basemap for the vector files included in this dataset is a georeferenced shaded relief tiff image whose metadata can be found in the file RI2004-3_basemap.faq.html. The 18 files listed below are available in both MapInfo TAB and ESRI shapefile format. Attribute information for the following layers (entities) is included in this metadata file under the "Entity_and_Attribution_Information" section. Each layer is listed and described in detail under its own heading starting "Entity_Type_Label." Listed here are the file names and a brief description of their content:
 >OKConeA5km_polyline approximate hazard zone for ballistics from Cone A
 >OKContinuousGPS_point location of continuous GPS stations
 >OKCraterCrFlood_polyline approximate limits of Crater Creek Flood hazard zone
 >OKCreeks_polyline major creeks around Okmok Volcano
 >OKDebrisArrows_polyline arrows showing the approximate location and direction of flow of debris avalanches that could occur on the steep flanks of Tulik Volcano and the inner caldera walls of Okmok Volcano
 >OKDebrisTDA_polyline mapped boundary of a prehistoric debris avalanche from Tulik Volcano
 >OKDebrisTulik_region approximate hazard zone for debris avalanches with source areas on the steep flanks of Tulik Volcano
 >OKFlood_region approximate location of flood and lahar hazards
 >OKFtGlennAir_point location of the Fort Glenn airstrip
 >OKHazMapBdry_polyline outline of the basemap
 >OKLatLines_polyline four 10-minute latitude lines in the map area
 >OKLongLines_polyline four 20-minute longitude lines in the map area
 >OKPFsurge_polyline approximate location of pyroclastic flow and surge hazard zone
 >OKRim15km_polyline approximate limit of significant ashfall, located 15 kilometers from the caldera rim
 >OKRim30km_polyline approximate maximum extent of pyroclastic flows, sures, and lateral blasts during a very large eruption, located 30 kilometers from the caldera rim
 >OKroad_polyline unmaintained dirt roads
 >OKSeisStat_point location of seismic stations
 >OKtrail_polyline unmaintained trails

Metadata

Metadata is the data about the data and answers "Who, what, when, where, how and why?" about the dataset. Please see the DGGS Metadata README page for information about our metadata.

Use Constraints

Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product.

Distribution Contact Information

Metadata Manager
Alaska Division of Geological & Geophysical Surveys
3354 College Road
Fairbanks, AK 99709-3707
Phone Number: (907)451-5020
Fax Number: (907)451-5050
E-mail: dggspubs@alaska.gov