20250617 10340600 1.0 TRUE https://www.arcgis.com/sharing/rest/content/items/e2232dad29af403793f688fb10abf6d8/info/thumbnail/thumbnail1782756318708.png Map <p>In response to catastrophic landslides in Alaska, the State of Alaska established the Landslide Hazards Program in the Division of Geological &amp; Geophysical Surveys (DGGS) to assess and communicate the state’s landslide risks. A key initiative of the program is the development of a statewide landslide inventory, which will be integrated into the U.S. Landslide Inventory (Mirus and others, 2020). This Alaska Landslide Inventory (ALI) database contains previously mapped landslides from published geological reports and includes newly identified, unpublished landslides reported in the news or identified through aerial imagery interpretation. Landslides are first classified by movement type (e.g., slides, falls, flows, spreads, thaw-related) and include other attributes such as kinematic features, event date, and confidence intervals. This working database serves as a dynamic resource for our partners and the public. Future goals include addressing missing information, improving categorization of the current entries, and identifying additional landslides.</p><p>For more information, see <a target='_blank' href='https://dggs.alaska.gov/pubs/id/31697' rel='nofollow ugc noopener noreferrer'>DGGS DDS 23 Alaska landslide inventory database citation page</a></p> Alaska landslide inventory database, Digital Data Series 23, provides a catalog of slope instabilities across Alaska and documents the development of the Alaska Landslide Inventory (ALI), a geospatial database created by the Division of Geological & Geophysical Surveys (DGGS) under the State's Landslide Hazards Program. Initiated in response to recent catastrophic landslides, the ALI consolidates both published and newly identified landslide events, including those reported in media sources and interpreted from aerial imagery. Each entry is classified by movement type (e.g., slides, flows, thaw-related) and includes metadata such as event date, kinematic features, and confidence intervals. The inventory is designed to support hazard assessment, land-use planning, and risk mitigation efforts, and will be integrated into the national U.S. Landslide Inventory. This report outlines the methodology used to compile the database, discusses current limitations, and identifies future goals for expanding coverage, refining classifications, and improving data completeness. The ALI is intended for regional or community-scale analysis and is not suitable for site-specific or legal use. This data is released with an open end-user license. All files can be downloaded from the Alaska Division of Geological & Geophysical Surveys website (http://doi.org/10.14509/31697). Nicolazzo, J.A., and Larsen, M.C., 2025, Alaska landslide inventory database: Alaska Division of Geological & Geophysical Surveys Digital Data Series 23, 14 p. https://doi.org/10.14509/31697 <div style='color:rgb(0, 0, 0); font-family:&quot;Times New Roman&quot;; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin-bottom:0.5em; margin-left:2em; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>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 &amp; 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.</div><div style='color:rgb(0, 0, 0); font-family:&quot;Times New Roman&quot;; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin-bottom:0.5em; margin-left:2em; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>&nbsp;</div><div style='color:rgb(0, 0, 0); font-family:&quot;Times New Roman&quot;; font-size:medium; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin-bottom:0.5em; margin-left:2em; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'><span style='background-color:rgb(255,255,255); color:rgb(20,20,20); font-family:&quot;Avenir Next&quot;, Avenir, &quot;Helvetica Neue&quot;, sans-serif; font-size:16px;'><span style='display:inline !important; float:none; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; text-align:start; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>This data is released with an open end-user license. All files can be downloaded from the Alaska Division of Geological &amp; Geophysical Surveys website (https://doi.org/10.14509/31697).</span></span></div> -175.605457-125.15626170.36003551.351948DGGSlandslideAlaska 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PUVsoXppHFPE+zxVSSV09zIs/FcL4W8iMbf305H5dR+tbtvNBcQLJbujxHoU6VzGteHoLS1e6t5CqrjMbHPU44NR+EHkTULmIE+S8e8r6MCBn8Qf0pc84zUWiauHo1KTq0Xa3Q7Ciiiuk8wK8r1Dwprk3iW6uo7Bmge7aRX3rypfOevpXqlFYV8PGskpdDsweNnhW3BJ37hXlviTwrrd94hvbm2sWkhkfKtvUZGB6mvUqKK9CNaKjIMHjZ4SbnBJ3VtTjPG2matqllY2dhaNLGnzykOowwGAOT7mr/gnRp9G0V0u4vLuZZS7LkEgdAOPpn8a6SihYeKq+1vqEsbUeHWGskr38zM16zkvdLeOJC8qsGRRjnnB6+xNY+mWGqWdtexeQyebF8hDD735+hNdXRWjgm7kU8TKFP2dk1ucGug6qrBltmBHIIdeP1qb+zNe/uz/APf4f4121FR7Fdzd5jUe8V/XzOVjstWGj3Nu8UjyyuoAaQHC9+9WvDel3FlJPLcxbGICqMg8d+n4V0FFUqaTTMp4ucoyjZK5T1ayGo6Rd2eOZomVfrjj9cVwHhLQNe0fxBDcTWDpbsDHKfMU4U/Q+oFel0VFTDxqTjNvVDoY2pRpTopJqXc8t8R+FdbvvEN7c21i0kMkmVbeoyMD1Nely2yXNkbeZcqybSPSp6KKWHjTlJrqPEY6pXjCMklybW+X+RwDad4i0vVYJbCwaZI3zIwdQHXoRye4/pWr460u+1jRbaGxt2llWcOybgCBtYdz7iuqop+xXK430ZX9oT9pCryq8fXX11PHYPC3i62Ro7e3uYUc/Msdyqg/XDV03h/wTc28QN8yxs53SANuY+2eld5RUQwsIu+5vXznEVYuNkr9l/wSOOFIYFhiGxFXauO1cVq2h6tZzGazha9BO7csgVwfcH+ldzRWs6amrbHFh8TOjJyWt+55sieJb91il0y8Kg/8tpcKP++q7TRNIGmQMZCGnkxuI6D2FatFTTo8ju3c0xGNlWjyKKivIKKKK2OIKKKKACiiigAooooAKKKKACiiigAooooA87+L1zc2+iaYLa5mgMl6EZoXKkgq3pVGZdS8AeNNEs49Yvb/AErVZPJMN5JvZGyq5B7cup4x3rc+JXh7VPEOk2EOlQpLNBdCVldwowFI7+5FUrXw14k8Q+K7DWvFC2lrBpx3W9pbtuJfOQSee4B69hxXdTlFUkm1bW66+Rk0+YseKPG2ueH7m5kXw9G2nW7AGeW7VWlBxyi9e/YGsLxZ4y1mbV/C8uj20y2t2UmhRbgJ9rJ25iYdsE4545qtrHgXxJe6xr7NptnffbWLW1/cT8wpkkIq54OML0wMdcVo6n4P19NE8IXFhbRTajopzJbNKoDHKnhs4/h9e9XBUY8u1/8AgevcHzO5v6z4m8SadaWrweG42ke3Etw814iRwt3TJxuP0Nafg/xPF4s0BNSjgMDhzFLEW3bWGDwe4wQfxrjNd8OeJ9X8SWOrXGjWd9E1qENnc3I8q1l7kjPzDPPGc/gK6D4beHdQ8M+Hbix1KNEma8eRdjhgVKoAePoaxqQpqldWv5f8OUm+YzvC93cy/FTxRBJcSvDGi7I2clV5XoOgrpPE2satpUMP9laOt+0m7e8lwsSQgY5Yn1z6jpXIPo/jHR/HOs6xo+mWdzDekKpnnA+UY5xuB7U7xToPinXjoV9caZbXfkBvtemfaNkW/Jw2SeRjHc9Pc1TjCU4ttWsvyEm0i3Y/Ea5vvCmralHpSG+0pwLi2E2VKk8srAdsN+XWtCbxwJLjwzBYWi3EmtL5jAyY8lMAsenOPm/75NZvgjwxd+Hv+EkfXoLK2s75lIWOQeUE+fcoz0UbgOaxfhbpLS+Ir+8M4ubLSQ9jYyj7rBpGYkH6E/8AfdOUKPvNbL9V+jBOWhq3nxPuhLe3WnaMlzo9jL5U1w1yqO/PJRepHPv+FXdZ+Ib2Os6fYadpT6gdRsUurbY+1mLltoIxwMDJPauXX4eanpF/eW8PhvTtatZZS9vcz3HlmIHswyCce3511E3ha+X4jeH9VtrSKPTLCw+zuFkH7s7ZAFAPJHzLzinKNBbdn18vX/IScjrtJnvbnS7ebUbZbW8dcywq24IfTPeirlFcLd2ahRRRSAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAr31ha6nZS2d7Cs1vKMPG3RhnP9KSw06z0uzS0sLaO3t0+7HGuB/wDroop3drAWaKKKQBRRRQB//9k=