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U.S. Geological Survey Data Series 661

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This database was created using ArcGIS 9.3.1 personal geodatabase format and consists of feature datasets containing volcano hazards map feature classes for each of the six geographic areas depicted on Plate 1 of U.S. Geological Survey Bulletin 1847. ArcGIS-compatible GIS software is therefore required to use the files of this database. The geodatabase is stored in a single zipped folder in this release for ease of transfer. The scale of the source maps limits the spatial resolution of the database to 1:500,000 scale or less detailed. Available ArcGIS feature classes, organized by feature datasets corresponding to geographic areas depicted on Plate 1, are described below:

ArcGIS feature class Description
Shasta_MedicineLake_Lassen I. Mount Shasta, Medicine Lake Highland, and Lassen Peak Area
  Combined_Flowage_Hazard_Shasta Combined flowage-hazard zones (polygons)
  Debris_Flow_Hazard_Shasta Volcanic debris flow-hazard zones (polygons)
  Flood_Hazard_Shasta Flood-hazard zones (polygons)
  Lava_Flow_Hazard_Shasta Hazard zones for basaltic lava flows (polygons)
  Mafic_Tephra_Hazard_Shasta Areas subject to mafic tephra hazards (polygons)
  Pyroclastic_Flow_Hazards_Shasta Pyroclastic-flow-hazard zones (polygons)
  TephraHazard_ZoneX_Shasta Explosive tephra-hazard zone X (polygons)
  TephraHazard_ZoneY_Shasta Explosive tephra-hazard zone Y (polygons)
  Vents_Shasta Volcanic vent locations (points)
ClearLake II. Clear Lake Area
  Base_Surge_Hazard_ClearLake Base surge-hazard zones (polygons)
  Vents_ClearLake Volcanic vent locations (points)
MonoLake_LongValley III. Mono Lake-Long Valley Area
  Base_Surge_Hazard_MonoLake Base surge-hazard zones (polygons)
  Combined_Flowage_Hazard_MonoLake Combined flowage-hazard zones (polygons)
  Flood_Hazard_MonoLake Flood-hazard zones (polygons)
  FlowagePoly_MonoLake Flowage-hazard zone around possible future vents (polygon)
  Lava_Flow_Hazard_MonoLake Hazard zones for basaltic lava flows (polygons)
  Mafic_Tephra_Hazard_MonoLake Areas subject to mafic tephra hazards (polygons)
  Potential_Vent_Area_MonoLake Potential volcanic-vent area in Long Valley caldera (polygon)
  Pyroclasticflow_Hazards_MonoLake Pyroclastic-flow-hazard zone (lines)
  TephraHazards_ZoneX_MonoLake Explosive tephra-hazard zone X (lines)
  TephraHazards_ZoneY_MonoLake Explosive tephra-hazard zone Y (lines)
  Vents_MonoLake Volcanic vent locations (points)
OwensRiver_UbehebeCrater_Coso IV. Owens River, Ubehebe Crater, Coso Areas
  Base_Surge_Hazard_OwensRiver Base surge-hazard zone (polygon)
  Lava_Flow_Hazard_OwensRiver Hazard zone for basaltic lava flows (polygon)
  Mafic_Tephra_Hazard_OwensRiver Areas subject to mafic tephra hazards (polygon)
  Vents_OwensRiver Volcanic vent locations (points)
AmboyCrater_LavicLake V. Amboy Crater, Lavic Lake Area
  Lava_Flow_Hazard_AmboyCrater Hazard zones for basaltic lava flows (polygons)
  Mafic_Tephra_Hazard_AmboyCrater Areas subject to mafic tephra hazards (polygons)
  Vents_AmboyCrater Volcanic vent locations (points)
SaltonButtes VI. Salton Buttes Area
  Combined_Flowage_Hazard_SaltonButtes Combined flowage-hazard zones (polygons)
  Vents_SaltonButtes Volcanic vent locations (points)

View the README file for the digital database.

Download DS-661.zip containing the digital database.

Federal Geographic Data Committee (FGDC) metadata are available in text format for each feature dataset: Shasta_MedicineLake_Lassen, ClearLake, MonoLake_LongValley, OwensRiver_UbehebeCrater_Coso, AmboyCrater_LavicLake, SaltonButtes.
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2011

U.S. Department of the Interior
U.S. Geological Survey