Identification_Information: Citation: Citation_Information: Originator: Stelling, P.L. Originator: Beget, J.E. Originator: Gardner, J.E. Originator: Schaefer, J.R. Publication_Date: 2014 Title: Preliminary volcano-hazard assessment for Fisher volcano, Unimak Island, Alaska Geospatial_Data_Presentation_Form: report and digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2014-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 32 p., 1 sheet, scale 1:500,000. Online_Linkage: http://dx.doi.org/10.14509/29146 Description: Abstract: Fisher volcano, containing the largest Holocene caldera in the Aleutian volcanic arc, is an active volcano near the center of Unimak Island, about 120 kilometers southwest of Cold Bay and about 175 kilometers northeast of Dutch Harbor. The volcano is composed of numerous small volcanic centers around and within a large, oval caldera 12 by 18 kilometers in diameter and 500 to 1,000 meters deep that formed during a catastrophic eruption about 9,400 years ago. Since then, more than 30 separate vents inside and outside the caldera have erupted; the most recent eruption occurred in 1826. These eruptions have produced lava flows and widespread tephra (volcanic ash) deposits, and have occasionally been accompanied by large floods and lahars. The history of Fisher volcano includes repeated explosive and non-explosive eruptions of varying levels of intensity, and indicates that this pattern will continue in the future. Understanding the variety of potential hazards associated with different types of volcanic processes typical of Fisher volcano can help minimize the adverse effect of future eruptions on humans and infrastructure. This report is part of a series of volcano hazard assessments being prepared by the Alaska Volcano Observatory. The reports are intended to describe the nature of volcanic hazards at Alaska volcanoes and show the extent of hazardous areas with maps, photographs, and other appropriate illustrations. The reports are preliminary and subject to revision as new data become available. Purpose: This report is part of a series of volcano hazard assessments being prepared by the Alaska Volcano Observatory. The reports are intended to describe the nature of volcanic hazards at Alaska volcanoes and show the extent of hazardous areas with maps, photographs, and other appropriate illustrations. The reports are preliminary and subject to revision as new data become available. Supplemental_Information: The DGGS metadata standard extends the FGDC standard to include elements that are required to facilitate our internal data management. These elements, referred to as "layers" group and describe files that have intrinsic logical or topological relationships and correspond to subdirectories within the data distribution package. The metadata layer provides an FGDC metadata file and may include other documentation files. Attribute information for each data layer is described in this metadata file under the "Entity_and_Attribute_Information" section. Data layer contents: >border: A polygon shapefile that provides a generalized outline of the geographic area described by this report. >caldera-rim: outline of the caldera rim >rim-buffer-10km-40km: A shapefile outline of the caldera rim, 10km buffer, and a 40km buffer. >unimak-island-image: Unimak Island shaded relief image, GeoTIF format Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2006 Ending_Date: 2014 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -165.286389 East_Bounding_Coordinate: -162.161195 North_Bounding_Coordinate: 55.661895 South_Bounding_Coordinate: 54.055384 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Active Volcanoes Theme_Keyword: Aleutian Arc Theme_Keyword: Ash Cloud Theme_Keyword: Ash Fall Theme_Keyword: Ballistics Theme_Keyword: Caldera Theme_Keyword: Debris Flow Theme_Keyword: Flood Theme_Keyword: Geologic Hazards Theme_Keyword: Geothermal Theme_Keyword: Hazards Theme_Keyword: Lahar Theme_Keyword: Lava Flow Theme_Keyword: Pumice Theme_Keyword: Pyroclastic Flow Theme_Keyword: Pyroclastic Surge Theme_Keyword: Tephra Theme_Keyword: Volcanic Ash Theme_Keyword: Volcanic Gas Theme_Keyword: Volcaniclastics Theme_Keyword: Volcanology Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: Aleutian Islands Place_Keyword: Fisher Place_Keyword: Unimak Quadrangle Temporal: Temporal_Keyword_Thesaurus: Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Temporal_Keyword: Holocene Access_Constraints: This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: GIS Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Electronic_Mail_Address: dggsgis@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: The information required to determine areas likely to be affected by pyroclastic flows and the surge ranges was derived from many sources. A comprehensive list of references is provided in the accompanying report. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: These geospatial data files replicate figures provided in the accompanying report. They are intended to be used for solely for illustrative purposes. The report and figures were reviewed by several geologists familiar with the subject matter. We incorporated the reviewers' suggestions into the final draft. Logical_Consistency_Report: Not applicable Completeness_Report: This dataset depicts visible and interpreted features that are distinguishable at a scale of 1:500,000. The reader is cautioned that these files are solely intended to provide general guidance and to facilitate communication. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: The cell size of the 2-arc-second NED data in Alaska is approximately 60 meters horizontally. Based on the digitizing scale and uncertainties in interpretation of the shaded relief image, the estimated horizontal accuracy of the lines likely in the range of 180 meters Lineage: Source_Information: Source_Citation: Citation_Information: Originator: U.S. Geological Survey (USGS), EROS Data Center Publication_Date: 1999 Title: National Elevation Dataset Publication_Information: Publication_Place: Sioux Falls, SD Publisher: U.S. Geological Survey Type_of_Source_Media: digital data Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: U.S. Geological Survey (USGS), EROS Data Center, 1999 Source_Contribution: Unimak Island shaded relief image Process_Step: Process_Description: Unimak Island shaded relief image - The Unimak Island shaded relief image was created from the 2-arc-second USGS National Elevation Dataset (NED). The author clipped the region around Unimak Island from the larger dataset, and then applied the hillshade function in Arc 3-D Analyst to create the shaded relief image. Source_Used_Citation_Abbreviation: U.S. Geological Survey (USGS), EROS Data Center, 1999 Process_Date: 2007 Process_Step: Process_Description: Caldera rim shapefile - The caldera rim polygon was constructed in MapInfo GIS by tracing the highest-elevation continuous ridgeline surrounding the caldera depression. The shaded relief basemap image generated from National Elevation Dataset (NED) 2-arc-second data was used as the basemap. Process_Date: 2007 Process_Step: Process_Description: Caldera rim buffer zone shapefile - Buffer zones of 10 km and 40 km were generated in MapInfo GIS using the caldera_rim polygon as the source of the buffer. Process_Date: 2007 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 3 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -165 Latitude_of_Projection_Origin: 0 False_Easting: 500000.000000 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000001 Ordinate_Resolution: 0.000001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.9786982 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: border Entity_Type_Label: ri2014-5-border.shp Entity_Type_Definition: A polygon shapefile that provides a generalized outline of the geographic area described by this report. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: caldera-rim Entity_Type_Label: ri2014-5-caldera-rim.shp Entity_Type_Definition: Outline of the caldera rim Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: rim-buffer-10km-40km Entity_Type_Label: ri2014-5-rim-buffer-10km-40km.shp Entity_Type_Definition: A shapefile outline of the caldera rim, 10km buffer, and a 40km buffer. Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Attribute: Attribute_Label: dist_km Attribute_Definition: Distance in kilometers from the caldera rim Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: caldera rim Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: Area likely to be affected by pyroclastic flows and surges during small- to moderate-sized eruptions, and maximum likely runout of large debris avalanches. Enumerated_Domain_Value_Definition_Source: This report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40 Enumerated_Domain_Value_Definition: Maximum extent of pyroclastic flows that could occur during a large eruption similar to caldera-forming events that occurred ~9,400 years ago Enumerated_Domain_Value_Definition_Source: This report Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: unimak-island-image Entity_Type_Label: ri2014-5-unimak-island-image.tif Entity_Type_Definition: Unimak Island shaded relief image, GeoTIF format Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: RI 2014-5 Distribution_Liability: The State of Alaska makes no expressed 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. Standard_Order_Process: Non-digital_Form: DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Fees: Contact DGGS for current pricing Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Shapefiles, GeoTIFF raster file Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.14509/29146 Fees: Free download Metadata_Reference_Information: Metadata_Date: 20141204 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: Metadata Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Use_Constraints: If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. Metadata_Extensions: Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions