Cameron, C.E. Schaefer, J.R. Ekberg, P.G. 2020 report and digital data Miscellaneous Publication MP 133 v. 4 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 2 sheets http://doi.org/10.14509/30426 This data lists the historically active volcanoes of Alaska and the year of the last major eruptive event. The volcanoes listed meet at least one of the following criteria since 1700 CE: 1) Documented, unquestioned eruption OR 2) A strongly suspected eruption, often an eruption documented in a historical account with very little information. Current geologic knowledge must not contradict the eruption account, OR 3) Persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within approximately 10 degrees C of the boiling point, OR 4) Significant, measured, volcanic-related, non-eruptive deformation, OR 5) Documented earthquake swarm with strongly suspected volcanic cause. All files can be downloaded free of charge from the DGGS website http://doi.org/10.14509/3042. The purpose of this dataset is to document the location and most recent eruptive events of the historically active volcanoes throughout Alaska. 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 the metadata, project border files, or 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: >volcano-locations: point data that provides the location and the year (when known) of the last major eruptive event for each volcano 2020 ground condition complete None planned -178.793680 179.597700 62.005720 51.788870 ISO 19115 Topic Category geoscientificInformation Alaska Division of Geological & Geophysical Surveys Active Volcanoes Alaska Statewide Maps Aleutian Arc Coastal and River Coastal and River Hazards Geologic Hazards Geology Hazards Historic Eruption Volcanic Volcanic Eruption Volcano Hazards Volcanoes Volcanology Alaska Division of Geological & Geophysical Surveys Alaska Peninsula Alaska, State of Aleutian Islands 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). 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. Alaska Division of Geological & Geophysical Surveys Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Cartography by: P.E. Gallagher and K.M. Mulliken Cameron, C.E. 2005 Raw Data File RDF 2005-3 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 1 p http://www.dggs.alaska.gov/pubs/id/7103 Cameron, C.E. Triplehorn, J.H. Robar, C.L. 2003 Miscellaneous Publication MP 131 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys http://www.dggs.alaska.gov/pubs/id/2880 Nye, C.J. 1995 Information Circular IC 38 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 2 sheets, scale 1:4,000,000 http://www.dggs.alaska.gov/pubs/id/484 Robbins, S.D. 2010 Miscellaneous Publication MP 137 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 3 sheets, scale 1:3,500,000 http://www.dggs.alaska.gov/pubs/id/21141 Cameron, C.E. Hendricks, K.A. Nye, C.J. 2017 Information Circular IC 59 v. 2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 4 p http://doi.org/10.14509/29738 The volcano names, date of last eruptive event, and location information in this dataset comes from the AVO website, www.avo.alaska.edu, accessed in January 2020. The volcano information on the AVO website is contained within a database and was compiled almost exclusively by Cheryl Cameron, and reviewed by staff of the Alaska Volcano Observatory. This database contains information on all published reports about Quaternary and younger Alaskan volcanism. The volcano names, locations, and eruptive history information found in the database is compiled by studying all locatable published documents. All of the locations were entered into the database, plotted in a GIS, and visually checked for accuracy. Where all published locations were inaccurate, new locations were generated by plotting a point within the GIS using a USGS digital topographic map. Not applicable The volcanoes listed meet at least one of the following criteria since 1700 CE: 1) Documented, unquestioned eruption OR 2) A strongly suspected eruption, often an eruption documented in a historical account with very little information. Current geologic knowledge must not contradict the eruption account, OR 3) Persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within approximately 10 degrees C of the boiling point, OR 4) Significant, measured, volcanic-related, non-eruptive deformation, OR 5) Documented earthquake swarm with strongly suspected volcanic cause. Location values were compiled from existing published resources and plotted using a GIS to visually verify accuracy. Where published locations of volcanic features appeared inaccurate, new locations were generated by creating a point on USGS digital topographic maps (using the largest scale available, 1:63,000 or 1:250,000) within the GIS. Cameron, C.E. Alaska Volcano Observatory Staff 2013 Fairbanks, AK Alaska Volcano Observatory online database 2020 publication date Cameron, C.E. and Alaska Volcano Observatory Staff, 2020 data compilation Data compilation - The volcano names, date of last eruptive event, and location information in this dataset comes from the AVO website, www.avo.alaska.edu, accessed in January 2020. The volcano information on the AVO website is contained within a database and was compiled almost exclusively by Cheryl Cameron. This database contains information on all published reports about Quaternary and younger Alaskan volcanism. The volcano names, locations, and eruptive history information found in the database is compiled by studying all locatable published documents. All of the locations were entered into the database, plotted in a GIS, and visually checked for accuracy. Where all published locations were inaccurate, new locations were generated by plotting a point within the GIS using a USGS digital topographic map. AVO website and database is extensively reviewed by Alaska Volcano Observatory staff and work to implement updates and corrections is ongoing. Although the database contains information on all volcanic features in Alaska with activity within the last two million years, the list given in this publication is for "historically active" volcanoes. To be considered "historically active" the volcanoes listed meet at least one of the following criteria since 1700 CE: The volcanoes listed meet at least one of the following criteria since 1700 CE: 1) Documented, unquestioned eruption OR 2) A strongly suspected eruption, often an eruption documented in a historical account with very little information. Current geologic knowledge must not contradict the eruption account, OR 3) Persistent (usually on the order of decades, but certainly longer than several months) fumaroles, with temperatures (where measured) within approximately 10 degrees C of the boiling point, OR 4) Significant, measured, volcanic-related, non-eruptive deformation, OR 5) Documented earthquake swarm with strongly suspected volcanic cause. Cameron, C.E. and Alaska Volcano Observatory Staff, 2020 2018 point 0.00001 0.00001 decimal degrees North American Datum of 1983 GRS 80 6378137 298.257222101 mp133v4-volcano-locations.shp, mp133v4-volcano-data-sources.csv Point data that provides the location and the year (when known) of the last major eruptive event for each volcano. Alaska Division of Geological & Geophysical Surveys volcano-locations name The names of the volcanoes in this dataset Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff The volcano names reflect the common use name used by staff at the Alaska Volcano Observatory. The names of the volcanoes in this dataset were taken from U.S. Geological Survey, 1:250,000-scale topographic maps. The names were modified by dropping terms such as "Mount" or "Peak." name_offic Official name used in the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA). Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text latitude Latitude of the volcano location (NAD83 datum) Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff 51.7887 62.0057 degrees longitude longitude of the volcano location (NAD83 datum) Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff 179.5977 -178.79368 degrees vnum Smithsonian Institution National Museum of Natural History Global Volcanism Program record identifier used by the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA). Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff number NULL Blank (NULL) field values indicate that the volcanic vent has not been assigned a record identifier in the Smithsonian Institution National Museum of Natural History Global Volcanism Program. Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff link Link to related information in the Geologic Database of Information on Volcanoes in Alaska (GeoDIVA). Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text eruption_y Year of last major eruptive event. For the purposes of this dataset, a major eruptive event is considered to be one in which juvenile lava erupt as a lava flow or dome or as an explosive column reaching an altitude of several thousand meters above the vent. Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff 1786 2020 date 0 Zero (0) field values indicate that the year of the last major eruptive event is unknown. Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff reason Brief description how each volcano met the historically active criteria. For for the most current and comprehensive information about active volcanoes in Alaska, we encourage users to see the Alaska Volcano Observatory website (https://www.avo.alaska.edu/). Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text identity_c Confidence in classifying the volcano as historically active. Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text: certain or questionable label Lable displayed on printable maps. This field also serves as a cross link between the volcano information table and the data reference sources table (primary key in mp133v4_volcano_locations.shp and foreign key in mp133v4-volcano-data-sources.csv) Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text eruption_d Eruption date certainty. Empty (null) field values indicate that the year of the last major eruptive event is unknown. Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text: certain or questionable citation These records provide up to three overview references that are pertinent to the historical activity of the applicable volcano. Alaska Division of Geological & Geophysical Surveys and Alaska Volcano Observatory Staff text State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys mailing and physical

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Fairbanks AK 99709-3707 USA 907-451-5020 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays 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. MP 133 v. 4 The State of Alaska makes no express or implied warranties (including warranties of merchantability and fitness) with respect to the character, function, or capabilities of the electronic services 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, any failure thereof, or otherwise, and 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. 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. see http://dx.doi.org/10.14509/30426 report and digital data http://dx.doi.org/10.14509/30426 Free download 20200221 Simone Montayne mailing and physical

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Fairbanks AK 99709-3707 USA 907-451-5020 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 If the user has modified this metadata file in any way, the user is obligated to describe the types of modifications the user has made. User specifically agrees not to misrepresent this metadata file, 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. http://www.dggs.alaska.gov/metadata/dggs.ext dggs metadata extensions