{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "Rex L Baum", "hasEmail": "mailto:baum@usgs.gov"}, "description": "A time-lapse camera was used to document periodic reactivation of a complex landslide on a steep coastal bluff in Mukilteo, Washington. This landslide is one of four monitoring sites initiated by the U.S Geological Survey to investigate hill-slope hydrology and landslide hazards affecting the railway corridor along the eastern shore of Puget Sound between the cities of Seattle and Everett (Mirus et al., 2016; Smith et al. 2017). The camera was installed in the crown of the landslide above the main scarp facing roughly North, with a field of view that includes the head of the landslide body and a minor scarp below. The attached file \u2018CameraLocation.PNG\u2019 provides an overview figure of the landslide and the camera\u2019s location relative to the different monitoring stations. It recorded imagery from August 19th, 2015 through May 25th, 2016. The time-lapse photos were taken three times daily (at 9 am, 12 pm, and 4 pm, PST) and stored onsite on a memory card; corresponding intervals between the photographs were 3 hours, 4 hours, and 17 hours (overnight). The time-lapse photos were compiled into a video and five periods of distinct ground movement were identified. Apparent slow and consistent slope-surface movements are recorded during these periods, but subsequent site visits suggest that these slow displacements indirectly triggered topples and debris-avalanche movements both up slope and down slope of the camera\u2019s field of view. The approximate sizes of topples and debris avalanches were on the order of 10^5 \u201310^7 cubic centimetres. The video captures slope movements during the time periods of December 8\u20139, 2015; January 21\u201330, 2016; and March 9\u201314, 2016. In addition, the video shows two seemingly \u201cinstantaneous\u201d events during the nights of March 23 and March 26. Each of these periods of slope movement also correspond to observed rainfall events and associated subsurface hydrologic responses documented elsewhere (Mirus et al. 2017; Smith et al. 2017).\nThe time-lapse video can be found in the attached .mp4 file \"mukilteo_timelapse_video.mp4\" \nThe individual time-lapse photos can be downloaded from the attached zip file \"mukilteo_timelapse_photos.zip.\" More detailed information about the camera and settings used can be found in the metadata file.\nThe following citations relate to reports that provides background information and are intended to accompany this data release.\nMirus, B. B., Smith, J. B., Stark, B., Lewis, Y., Michel, A., & Baum, R. L. (2016). Assessing landslide potential on coastal bluffs near Mukilteo, Washington\u2014Geologic site characterization for hydrologic monitoring. (U.S. Geological Survey Open-File Rep., 2016-1082, 28). Reston, VA: U.S. Geological Survey. https://doi.org/10.3133/ofr20161082\nSmith, J. B., Baum, R. L., Mirus, B. B., Michel, A., & Stark, B. (2017). Results of hydrologic monitoring on landslide-prone coastal bluffs near Mukilteo, Washington (U.S. Geological Survey Open-File Rep., 2017\u20131095, 47 p.). Reston, VA: U.S. Geological Survey. https://doi.org/10.3133/ofr20171095\nMirus, B. B., Smith, J. B., & Baum, R. L. (2017). Hydrologic impacts of landslide disturbances: implications for remobilization and hazard persistence. Water Resources Research, 53. https://doi.org/10.1002/2017WR020842", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P99QOYL2", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5ef2388382ced62aaae3bbbe.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5ef2388382ced62aaae3bbbe", "keyword": ["Mukilteo", "N/A", "Puget Sound", "Seattle", "Snohomish County", "USGS:5ef2388382ced62aaae3bbbe", "United States", "Washington", "field monitoring stations", "geomorphology", "geoscientificInformation", "image collections", "landslides", "photography", "soil sciences"], "modified": "2020-08-20T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-122.3328, 47.92341, -122.26685, 47.95653", "theme": ["geospatial"], "title": "Time-lapse photography of an active coastal-bluff landslide, Mukilteo, Washington, August 2015 - May 2016"}