Schaefer, J.R. Cameron, C.E. Nye, C.J. 2011 tabular digital data, map Miscellaneous Report MP 133 v. 1.1 Fairbanks, AK State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys 1 sheet, scale 1:3,000,000 http://dx.doi.org/10.14509/20181 This data lists the historically active volcanoes of Alaska, their location in latitude/longitude decimal degrees, and the year of the last major eruptive event. The 52 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 the 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 ~10°C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly suspected volcanic cause.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. This data is represented cartographically in Alaska Division of Geological & Geophysical Surveys Miscellaneous Publication 133 (Schaefer, J.R., Cameron, C.E., and Nye, C.J., 2009) where the volcano locations are displayed on a grayscale digital shaded relief image of Alaska with a background image of colorized bathymetry. The purpose of this dataset is to document the location and most recent eruptive events of the historically active volcanoes of Alaska. The decimal degree locations and the names of the volcanoes in this dataset were taken from the AVO website, accessed October 21, 2009. This list of "volcanoes" includes volcanic centers, groupings of several related volcanoes, as well as individual vents. For all instances, the name given here reflects the current shortened name in use by the Alaska Volcano Observatory; descriptives such as "Peak" and "Mount" have been dropped. Some volcanoes and volcanic centers (e.g. "Emmons Lake Volcanic Center") have no formal name assigned by the U.S. Board of Geographic Names. The publication consists of a map and a spreadsheet which contains elplicit location information. This dataset consists of a single layer which is listed and described in detail under its own heading starting "Entity_Type_Label." The layer is titled: >HistoricallyActiveVolcanoes location and the year of the last major eruptive event 200910 201110 ground condition In work As needed +167.00 -146.56 65.76 46.71 ISO 19115 Topic Category geoscientificInformation ADGGS Active Volcanoes Aleutian Arc Historic Eruption ADGGS Alaska, State of Aleutian Islands Alaska Peninsula This report, map, and/or data set are available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Any hardcopies or published data sets utilizing these data sets 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. User specifically agrees not to misrepresent these data sets, 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. State of Alaska, Division of Geological & Geophysical Surveys Volcanology Section Geologist mailing and physical

3354 College Road

Fairbanks AK 99709 USA (907) 451-5000 (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. The idea for this data set is based on the publication: "Nye, C.J., 1994, Aleutian Arc Volcanoes:Alaska Division of Geological & Geophysical Surveys Public Data File 94-54. See process steps. Not applicable This data lists the historically active volcanoes of Alaska, their location in latitude/longitude decimal degrees, and the year of the last major eruptive event.The 52 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 the 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 ~10°C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly suspected volcanic cause. 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 The horizontal positions are reported to as many decimal degrees (at least 2, and up to 5) as the authors feel the location can be confidently known. Longitude and latitudes 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., and Alaska Volcano Observatory Staff 2005 accessed October 2009 searchable web database http://www.avo.alaska.edu/volcano online 201110 ground condition Cameron, C.E., 2005 All volcano names, locations, and date of last eruptive event, were derived from the Alaska Volcano Observatory on-line database. The volcano names, date of last eruptive event, and latitude/longitude information in this dataset comes from the AVO website, www.avo.alaska.edu, accessed in October of 2009. 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. 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 52 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 the 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 ~10°C of the boiling point, or (4) significant, measured, volcanic-related, non-eruptive deformation, (5) documented earthquake swarm with strongly suspected volcanic cause. To create this list, all references and volcanoes were reviewed to determine whether or not a volcano was eligible. Eruption history information was compiled from all locatable sources, and then reviewed by AVO staff for reliability, consistency, and accuracy. The eruption history information contained in the database was distilled here to the year of the last known major eruption, defined here as an eruption of juvenile tephra to at least several thousand meters above the vent, or an eruption forming a lava flow or dome. Many of these volcanoes have had more recent eruptions that do not meet this criteria (e.g. Fourpeaked had a phreatic explosion in 2006). Cameron, C.E., 2005 2009 (1) The label for Cleveland volcano on the map sheet now reads 'Cleveland 2011' instead of 'Cleveland 2009'. (2) The entry '2009' for Cleveland in the field 'Year_Last_Major_Event' in the associated table has been changed to '2011' 2011 Point 0.001 0.001 Decimal degrees World Geodetic System of 1984 World Geodetic System of 1984 6378137 298.25722210088 HistoricallyActiveVolcanoes HistoricallyActiveVolcanoes.csv Spreadsheet data table with the following attributes: volcano, latitude_wgs84, longitude_wgs84, and year_last_major_event Schaefer, J. R., Cameron, C. E., and Nye, C. J., 2009, Historically Active Volcanoes of Alaska, Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 133 volcano 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".The names chosen reflect the common use name used by staff at the Alaska Volcano Observatory. Schaefer, J. R., Cameron, C. E., and Nye, C. J., 2009, Historically Active Volcanoes of Alaska, Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 133 The volcano names chosen reflect the common use name used by staff at the Alaska Volcano Observatory. Latitude_WGS84 Latitude in decimal degrees, WGS84 datum Schaefer, J. R., Cameron, C. E., and Nye, C. J., 2009, Historically Active Volcanoes of Alaska, Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 133 51.7887 62.00572 degrees 0.001 Accurate to at least 0.001 degrees Longitude_WGS84 Longitude in decimal degrees, WGS84 datum Schaefer, J. R., Cameron, C. E., and Nye, C. J., 2009, Historically Active Volcanoes of Alaska, Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 133 -182.3965 -144.01935 degrees 0.001 Accurate to at least 0.001 degrees Year_Last_Major_Event 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. Schaefer, J. R., Cameron, C. E., and Nye, C. J., 2009, Historically Active Volcanoes of Alaska, Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 133 1912 2010 year This data lists the historically active volcanoes of Alaska, their location in latitude/longitude decimal degrees, and the year of the last major eruptive event. Schaefer, J. R., Cameron, C. E., and Nye, C. J., 2009, Historically Active Volcanoes of Alaska, Alaska Division of Geological and Geophysical Surveys Miscellaneous Publication 133 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys mailing and physical

3354 College Road

Fairbanks AK 99709-3707 USA 907-451-5020 None available 907-451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays Please view our web site (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. This report 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 requester or anyone else exceed the fee paid for the electronic service or product. Current publication is available on paper. 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. contact DGGS by phone for current fees XLS No compression applied http://dx.doi.org/10.14509/20181 Digital files on CD-ROM are available for $10.00 (contact information below). No fees charged for downloaded files. Order by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). The DGGS web site (http://www.dggs.alaska.gov/) has a list of electronic data available and an order form that can be printed. Payment accepted: Cash, check, money order, VISA, or MasterCard. Digital downloads: less than 30 minutes for most files. Offline CD/DVD: 1-2 weeks unless special arrangements are made and an express fee is paid. 2011 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys Metadata Manager mailing and physical

3354 College Road

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 contact us through the e-mail address above whenever possible. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 none 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 State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys.