{
 "about": "The record of this Plate: the facts it is drawn from, kept inside the work. Plain JSON; the artwork does not read it. CC0 1.0, no rights reserved.",
 "work": {"title": "Okhotsk", "series": "Plates", "artist": "Kenny Lienhard", "year": 2026, "plate": "15 of 52", "palette": "kaolin"},
 "plate": {"name": "Okhotsk", "code": "OK", "model": "PB2002 (Bird 2003)", "class": "minor", "area_km2": 3037109, "centroid_lat_lon": [51.244, 148.991], "ocean_share": 0.7311, "land_share": 0.2689},
 "motion": {"frame": "no-net-rotation", "euler_pole_lat_lon": [30.2119, -98.4199], "rotation_deg_per_million_years": 0.23087, "speed_mm_per_year_at_centroid": 25.23, "heading_deg_at_centroid": 144.3, "speed_range_mm_per_year": [23.09, 25.67], "the_artwork_drifts": "25.23 mm a year along its cut, one frame of rock every 20652 years"},
 "cover": {"slope and ridge": 0.4002, "shelf sea": 0.2204, "boreal forest": 0.1226, "deep ocean": 0.0955, "forest": 0.0467, "grassland": 0.0376, "tundra": 0.0234, "cropland": 0.0164, "ocean trench": 0.0151, "wetland": 0.0081, "bare rock": 0.0058, "towns": 0.0037, "lakes and rivers": 0.0025, "desert": 0.0019, "ice": 0.0001},
 "palette_from": ["taiga", "forest", "grassland"],
 "era": {"name": "Land bridge", "what": "Low seas, Hokkaido and Sakhalin joined to Asia", "arrives_years_before_2026": [30100, 30000], "leaves_years_before_2026": [16576, 8276], "account": "The past. With the sea about 120 metres lower, more than 400,000 square kilometres of today’s shallow seas on this plate were dry land, about a fifth of its sea. Hokkaido and Sakhalin were one land joined to Asia, mammoths lived on Hokkaido, and a wide plain ran along the north shore from Magadan to Kamchatka. Honshu stayed an island. The land was already dry when the timeline begins; the rising sea drowned most of it between 16,576 and 8,276 years ago. The lines that stand for the sea turn to the colour of land, all at once, and only across those spans.", "source": "Lambeck et al. 2014, PNAS 111:15296; Lo et al. 2018, Earth and Planetary Science Letters 488:36; Nakazawa et al. 2011, Quaternary International 242:416; Kawamura 2007, The Quaternary Research 46:171"},
 "history": [{"years_ago": 19500000, "range_years_ago": [23040000, 15980000], "what": "The Sea of Japan opened, carrying northeast Japan, now on this plate, away from mainland Asia.", "source": "Jolivet, Tamaki and Fournier 1994, Journal of Geophysical Research 99:22237, doi:10.1029/93JB03463; ICS International Chronostratigraphic Chart v2024/12 (Cohen et al. 2013, updated), stratigraphy.org"}],
 "outline_lon_lat": [[[141.1, 34.44], [141.44, 34.36], [141.88, 34.21], [141.99, 34.67], [142.03, 34.89], [142.07, 35.16], [142.17, 35.22], [142.22, 35.33], [142.32, 35.5], [142.46, 35.67], [142.56, 35.94], [142.61, 36.0], [142.68, 36.06], [142.76, 36.19], [143.02, 36.34], [143.15, 36.52], [143.28, 36.65], [143.41, 36.86], [143.74, 37.48], [143.84, 37.71], [143.89, 37.93], [143.93, 38.17], [143.97, 38.36], [144.06, 38.71], [144.12, 38.91], [144.19, 39.12], [144.2, 39.37], [144.24, 39.56], [144.22, 39.77], [144.25, 39.93], [144.28, 40.07], [144.33, 40.2], [144.48, 40.55], [144.45, 40.85], [145.08, 41.32], [145.71, 41.79], [146.69, 42.36], [147.34, 42.69], [149.31, 43.72], [150.34, 44.19], [151.42, 44.7], [152.24, 45.16], [152.88, 45.53], [153.53, 45.9], [154.19, 46.44], [155.14, 47.26], [155.74, 47.72], [156.35, 48.18], [157.02, 48.66], [157.57, 49.11], [158.12, 49.55], [159.17, 50.15], [159.88, 50.86], [160.6, 51.49], [160.94, 52.16], [161.58, 52.65], [162.46, 53.0], [162.79, 53.62], [163.28, 54.35], [164.07, 55.21], [163.34, 55.82], [162.59, 56.42], [163.34, 57.25], [163.72, 57.66], [164.12, 58.08], [164.52, 58.49], [164.93, 58.9], [166.26, 59.38], [167.62, 59.84], [169.03, 60.29], [169.87, 61.02], [170.74, 61.74], [169.72, 61.67], [168.71, 61.59], [167.7, 61.51], [166.69, 61.41], [165.01, 61.34], [163.34, 61.24], [162.35, 61.27], [161.36, 61.3], [160.36, 61.31], [159.37, 61.32], [158.04, 61.41], [156.72, 61.48], [155.34, 61.61], [153.95, 61.72], [152.6, 62.35], [151.19, 62.97], [149.72, 63.57], [148.19, 64.16], [146.59, 64.73], [144.93, 65.29], [145.49, 64.44], [146.01, 63.59], [146.5, 62.73], [146.96, 61.88], [146.13, 61.57], [145.31, 61.25], [144.5, 60.94], [143.72, 60.61], [142.94, 60.28], [142.19, 59.95], [141.99, 59.01], [141.8, 58.07], [141.62, 57.13], [141.45, 56.19], [141.94, 55.11], [142.41, 54.03], [142.85, 53.38], [142.54, 51.7], [142.4, 50.86], [142.88, 48.7], [142.02, 48.05], [141.18, 47.39], [140.55, 46.96], [139.94, 46.52], [139.37, 46.22], [139.16, 45.95], [139.04, 45.41], [138.85, 44.81], [138.58, 44.29], [138.56, 43.94], [138.8, 43.19], [138.81, 42.77], [138.82, 42.0], [138.74, 41.77], [138.49, 41.48], [138.47, 41.1], [138.76, 40.78], [138.66, 40.47], [138.66, 40.07], [138.35, 39.83], [138.09, 39.66], [137.84, 39.4], [137.77, 38.98], [137.85, 38.48], [137.89, 37.86], [137.9, 37.18], [137.85, 36.6], [137.89, 36.31], [138.12, 36.03], [138.26, 35.73], [138.42, 35.36], [138.67, 35.03], [139.23, 35.01], [139.43, 34.86], [139.92, 34.71], [140.44, 34.63], [140.87, 34.53], [141.1, 34.44]]],
 "sources": ["Plate outlines and motion: Bird, P. (2003). An updated digital model of plate boundaries. Geochemistry, Geophysics, Geosystems 4(3), 1027, doi:10.1029/2001GC000252. No-net-rotation frame computed from PB2002 alone.", "What covers each plate: ESA CCI Land Cover and Water Bodies, NOAA ETOPO 2022, Koppen-Geiger climate maps, NSIDC Sea Ice Index, on a 1 arc-minute grid."],
 "engine_sha256": "a7fbc03acc0fc9ba343881bb88ddaf2b7564564d8bc9cbed16e75e47e01fb3f2"
}