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Mount Shishaldin

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several weeks. The summit cone partially collapsed on November 25, producing a pyroclastic flow down the northwest side of the volcano and a new lava flow. On December 12, a short-lived explosion from Shishaldin expelled an ash cloud to 20,000–25,000 ft (6,100–7,600 m). During late December, eruptive activity continued with lava flows and low-level explosive activity at the summit. On January 3, 2020, seismicity led to an ash cloud eruption that reached as high as 27,000 ft (8,200 m). Another large ash cloud was emitted on January 19, 2020. This event ended shortly afterwards with an abrupt end in seismicity. The lava flows emitted during the eruptive events have cut deep channels in the snow and ice mantle of the volcano's north slope.
387:. It is the highest mountain peak of the Aleutian Islands and rises about 8,000 m (26,000 ft) from the bottom of the Aleutian Trench 140 mi (230 km) south of the volcano. The volcano's topographic contour lines are nearly perfect circles above 6,500 ft (2,000 m). The lower north and south slopes are somewhat steeper than the lower eastern and western slopes. Only on the volcano's west flank between about 3,500 to 6,500 ft (1,100 to 2,000 m) are small areas of rough topography which are remnants of an older collapsed volcano upon which Shishaldin is built. The volcano is the westernmost of three large 561: 592: 525: 513: 537: 169: 634: 573: 501: 162: 489:
2,500 ft (760 m) on the east side after a four day hike and ski trip from the village of False Pass. As they climbed the cone, they noted "we could never believe it was so tall since the summit always looked 'so close'. Yet it never seemed to get any closer!" It took that group about 8 hours to climb to the top. Shishaldin is a popular ski descent (6,000 ft (1,800 m) vertical) for local climbers (of whom there are few). Due to its remoteness, Shishaldin is not often climbed by outsiders.
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A new period of activity started in July 2019 with incandescence observed in the summit crater during a time of increased seismic activity. On July 23, an active lava lake and minor spattering within the summit crater was observed. A new lava effusion event began on October 13 advancing over the next
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and shield. Remnants of the older ancestral volcano are exposed on the west and northeast sides at 4,900 to 5,900 ft (1,500 to 1,800 m) elevation. The Shishaldin edifice contains about 300 km (72 cu mi) of material. A very steady steam plume rises from its small summit crater
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After more than two years of dormancy, another eruptive cycle began and on 14 July 2023, the volcano emitted ash plumes up to 40,000 ft (12,000 m) high after several explosions at the summit. Fourteen significant explosive events occurred at Shishaldin between 12 July and 3 November 2023.
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possible eruptions) in Alaska, but half of the eruptions are unconfirmed. Recent, well-documented eruptions were in 1995–96 and 1999. Since the 1999 eruption, it has maintained seismic activity, typically having very low-magnitude volcanic earthquakes (most are below magnitude 1) every 1–2 minutes.
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This volcano has had many recorded eruptions during the 19th and 20th centuries, and a couple of reports of volcanic activity in the area during the 18th century may have referred to Shishaldin as well. Therefore, the volcano's entire recorded history is spotted with reports of activity. AVO has 24
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The upper 6,600 ft (2,000 m) is almost entirely covered by glacial snow and ice. In all, Shishaldin's glacial shield covers about 35 sq mi (91 km). It is flanked to the northwest by 24 monogenetic parasitic cones, an area blanketed by massive lava flows. The Shishaldin cone
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Orr, T.R., Cameron, C.E., Dietterich, H.R., Dixon, J.P., Enders, M.L., Grapenthin, R., Iezzi, A.M., Loewen, M.W., Power, J.A., Searcy, C., Tepp, G., Toney, L., Waythomas, C.F., and Wech, A.G., 2023, 2019 Volcanic activity in Alaska—Summary of events and response of the Alaska Volcano Observatory:
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1, snow up to 40 degree slope), it is possible that an earlier ascent occurred, either by native Aleuts, Russians, or other visitors. Shishaldin is rather unique in that its appearance changes very little to a climber during an ascent. A group climbing Shishaldin in May, 2005 set a base camp at
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During this period of non-eruptive seismic activity, it has been puffing steam, with puffs also occurring about every 1–2 minutes. There were reports in 2004 of small quantities of ash being emitted with the steam. In 2014, a low-level effusive eruption cycle started which lasted into 2016.
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After the November 3 explosive event, much smaller explosions, steam and gas emissions and collapse events around the summit crater rim occurred frequently for about a week, By January 2024, only minor steam emissions and small events deep in the summit crater continued.
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Power, John A.; Haney, Mathew M.; Botnick, Stephen M.; Dixon, James P.; Fee, David; Kaufman, A. Max; Ketner, Dane M.; Lyons, John J.; Parker, Tom; Paskievitch, John F.; Read, Cyrus W.; Searcy, Cheryl; Stihler, Scott D.; Tepp, Gabrielle; Wech, Aaron G. (2020-03-01).
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which is about 500 ft (150 m) across and slightly breached along the north rim. In appearance, the volcano can vary from nearly completely white to almost all black, depending on the occurrence of ashfall deposits.
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The Alaska Volcano Observatory monitors the volcano for more hazardous activity with seismometers and satellite images. Due to the remote location of the volcano, visual observations are rare.
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The first recorded ascent of Shishaldin was in 1932, by G. Peterson and two companions. Given the straightforward nature of the climbing (
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confirmed eruptions at Shishaldin, making it the volcano with the third most confirmed eruptions (after
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is less than 10,000 years old and is constructed on a glacially eroded remnant of an ancestral
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Wood, Charles A.; Kienle, Jurgen, eds. (1992). "Shishaldin, Eastern Aleutian Islands".
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P., Stelling; J., Beget; C., Nye; J., Gardner; J., Devine; R., George (2002-12-01).
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The geology and petrology of Shishaldin Volcano, Unimak Island, Aleutian Arc, Alaska
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Volcanoes of the Alaska Peninsula and Aleutian Islands-Selected Photographs
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U.S. Geological Survey Scientific Investigations Report 2023–5039, 64 p.,
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The 126 most prominent summits of the United States of America
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along an east–west line in the eastern half of Unimak Island.
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Alaska Volcano Observatory, Volcano Information -- Shishaldin
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Shishaldin (left) and Isanotski volcanoes on Unimak Island.
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May 16, 1932 by G. Peterson et al. (first recorded ascent)
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An overhead view of the volcano from November 24, 2013
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Caplan-Auerbach, Jacqueline; Petersen, Tanja (2005).
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Volcanoes of North America: United States and Canada
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Shishaldin Volcano on the west end of Unimak Island.
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Island 2305: 2303: 2300: 2298: 2295: 2293: 2290: 2288: 2285: 2283: 2280: 2278: 2275: 2273: 2270: 2268: 2265: 2263: 2260: 2259: 2257: 2255: 2251: 2245: 2242: 2240: 2237: 2235: 2232: 2230: 2227: 2225: 2222: 2220: 2217: 2215: 2212: 2210: 2207: 2205: 2202: 2200: 2197: 2195: 2192: 2190: 2187: 2185: 2182: 2180: 2177: 2175: 2172: 2170: 2167: 2165: 2162: 2160: 2157: 2155: 2152: 2150: 2147: 2146: 2144: 2140: 2136: 2130: 2127: 2125: 2122: 2120: 2117: 2116: 2114: 2110: 2106: 2100: 2099:Tanana Valley 2097: 2095: 2092: 2090: 2087: 2085: 2082: 2080: 2079:Mat‑Su Valley 2077: 2075: 2072: 2070: 2067: 2065: 2062: 2058: 2055: 2053: 2050: 2048: 2045: 2043: 2040: 2038: 2035: 2033: 2030: 2029: 2028: 2025: 2024: 2022: 2018: 2012: 2009: 2007: 2004: 2002: 1999: 1997: 1994: 1992: 1989: 1987: 1984: 1982: 1979: 1977: 1974: 1972: 1969: 1967: 1964: 1962: 1959: 1957: 1954: 1952: 1949: 1947: 1944: 1943: 1941: 1937: 1932: 1922: 1919: 1917: 1914: 1912: 1909: 1907: 1904: 1902: 1899: 1897: 1894: 1890: 1887: 1886: 1885: 1882: 1878: 1875: 1874: 1873: 1870: 1868: 1865: 1863: 1860: 1858: 1855: 1854: 1852: 1850: 1846: 1841: 1840: 1834: 1830: 1826: 1819: 1814: 1812: 1807: 1805: 1800: 1799: 1796: 1783: 1780: 1778: 1775: 1773: 1770: 1768: 1765: 1763: 1760: 1758: 1757:Mount Augusta 1755: 1753: 1750: 1748: 1745: 1743: 1740: 1738: 1737:Mount Gareloi 1735: 1733: 1730: 1728: 1725: 1723: 1720: 1718: 1717:Mount Deborah 1715: 1713: 1710: 1708: 1705: 1703: 1700: 1698: 1695: 1693: 1690: 1688: 1685: 1683: 1680: 1678: 1675: 1673: 1670: 1668: 1665: 1663: 1660: 1658: 1655: 1653: 1652:Mount Steller 1650: 1648: 1647:Bearhole Peak 1645: 1643: 1640: 1638: 1635: 1633: 1630: 1628: 1627:Mount Foresta 1625: 1623: 1620: 1618: 1615: 1613: 1612:Snowshoe Peak 1610: 1608: 1605: 1603: 1602:Mount Russell 1600: 1598: 1595: 1593: 1590: 1588: 1587:Mount Seattle 1585: 1583: 1580: 1578: 1575: 1573: 1570: 1568: 1567:McDonald Peak 1565: 1563: 1560: 1558: 1555: 1553: 1550: 1548: 1545: 1543: 1540: 1538: 1535: 1533: 1530: 1528: 1525: 1523: 1520: 1518: 1515: 1513: 1510: 1508: 1505: 1503: 1500: 1498: 1495: 1493: 1490: 1488: 1487:Hanagita Peak 1485: 1483: 1480: 1478: 1475: 1473: 1470: 1468: 1465: 1463: 1460: 1458: 1455: 1453: 1452:Mount Igikpak 1450: 1448: 1445: 1443: 1440: 1438: 1435: 1433: 1430: 1428: 1425: 1423: 1420: 1418: 1415: 1413: 1410: 1408: 1407:Mount Douglas 1405: 1403: 1400: 1398: 1395: 1393: 1392:Mount Neacola 1390: 1388: 1385: 1383: 1380: 1378: 1375: 1373: 1370: 1368: 1365: 1363: 1360: 1358: 1355: 1353: 1350: 1348: 1345: 1343: 1340: 1338: 1337:Mount Crillon 1335: 1333: 1330: 1328: 1327:Mount Foraker 1325: 1323: 1320: 1318: 1317:Mount Kimball 1315: 1313: 1310: 1308: 1305: 1303: 1300: 1298: 1297:Mount Sanford 1295: 1293: 1290: 1288: 1285: 1283: 1282:Mount Olympus 1280: 1278: 1275: 1273: 1270: 1268: 1267:Mount Hubbard 1265: 1263: 1260: 1258: 1255: 1253: 1250: 1248: 1245: 1243: 1240: 1238: 1235: 1233: 1232:Mount Torbert 1230: 1228: 1225: 1223: 1220: 1218: 1215: 1213: 1210: 1208: 1205: 1203: 1200: 1198: 1197:Mount Whitney 1195: 1193: 1190: 1188: 1185: 1183: 1180: 1178: 1175: 1173: 1170: 1168: 1167:Mount Rainier 1165: 1163: 1160: 1158: 1155: 1154: 1150: 1146: 1139: 1134: 1132: 1127: 1125: 1120: 1119: 1116: 1109: 1105: 1102: 1098: 1095: 1093: 1090: 1087: 1083: 1079: 1075: 1071: 1067: 1063: 1058: 1054: 1050: 1049: 1044: 1040: 1039: 1027: 1021: 1017: 1010: 1008: 999: 995: 991: 987: 983: 979: 975: 971: 967: 959: 953: 946: 938: 934: 930: 926: 922: 918: 914: 907: 899: 895: 891: 887: 883: 879: 875: 868: 860: 856: 852: 848: 844: 840: 836: 832: 828: 821: 813: 807: 803: 799: 792: 790: 781: 775: 771: 767: 760: 746: 742: 736: 729: 724: 720: 710: 706: 703: 699: 696: 695: 687: 684: 682: 679: 673: 670: 669: 668: 665: 664: 663: 660: 659: 655: 649: 644: 641: 630: 627: 626:Alaska portal 616: 613: 602: 599: 588: 574: 569: 562: 557: 550: 545: 538: 533: 526: 521: 514: 509: 502: 497: 496: 490: 487: 477: 474: 470: 466: 463: 459: 455: 444: 442: 438: 434: 433: 428: 427: 422: 412: 410: 406: 401: 398: 392: 390: 386: 385:United States 382: 378: 374: 373:Unimak Island 370: 364: 331: 327: 318: 314: 310: 306: 302: 297: 293: 289: 287: 285:Easiest route 281: 277: 275: 271: 266: 262: 260: 259:Last eruption 256: 253: 250: 248: 244: 239: 236: 235:Stratovolcano 233: 231: 230:Mountain type 227: 222: 218: 215: 213: 209: 206: 203: 201: 195: 187: 183: 182:Unimak Island 163: 153: 148: 143: 115: 113: 109: 102: 99: 96: 93: 90: 87: 84: 81: 80: 78: 76: 72: 68: 66: 62: 58: 56: 52: 48: 46: 42: 37: 30: 25: 20: 2513: 2468:Copper River 2445:Census Areas 2089:Southcentral 1991:Homelessness 1966:Demographics 1837: 1732:Mount Lemmon 1682:Bashful Peak 1667:Mount Miller 1657:Mount Stuart 1622:Hayford Peak 1577:South Sister 1532:Isthmus Peak 1522:Deseret Peak 1422:De Long Peak 1402:Mount Graham 1352:Gannett Peak 1322:Mount Griggs 1312:Glacier Peak 1307:Wheeler Peak 1222:Mount Elbert 1211: 1207:Mount Shasta 1107: 1069: 1065: 1046: 1043:"Shishaldin" 1015: 973: 969: 958: 945: 920: 916: 906: 881: 877: 867: 834: 830: 820: 797: 765: 759: 748:. Retrieved 744: 735: 723: 708: 701: 486:Alaska Grade 483: 475: 471: 467: 461: 450: 440: 436: 431: 430: 425: 424: 418: 402: 393: 329: 325: 324: 274:First ascent 252:Aleutian Arc 199:Parent range 186:Alaska, U.S. 2357:Unorganized 2322:North Slope 2272:Bristol Bay 2047:North Slope 1996:LGBT rights 1889:Delegations 1877:Earthquakes 1777:Miller Peak 1762:Copper Peak 1722:Necons Peak 1712:Lassen Peak 1702:Tetlin Peak 1687:Ibapah Peak 1662:Blanca Peak 1537:Frosty Peak 1512:Mount Ellen 1467:Truuli Peak 1432:Mount Peale 1382:Grand Teton 1262:Mount Adams 1227:Mount Baker 1182:Mount Hayes 745:www.nps.gov 137: / 125:163°58′03″W 112:Coordinates 2536:Categories 2473:Dillingham 2332:Petersburg 2204:Petersburg 2194:North Pole 2159:Dillingham 1884:Government 1767:Mount Bear 1752:Mount Eddy 1747:Stony Peak 1607:Mount Nebo 1597:Pikes Peak 1582:Devils Paw 1557:Puʻu Kukui 1547:Crazy Peak 1542:Pilot Peak 1477:Borah Peak 1457:Snow Tower 1442:Dewey Peak 1397:Kings Peak 1372:Mount Drum 1367:Mount Bona 1347:Cloud Peak 1292:Mount Hood 1287:Mount Cook 1272:Mount Isto 1072:(4): 365, 750:2019-03-20 716:References 437:Shishaldin 308:Designated 122:54°45′21″N 55:Prominence 2267:Anchorage 2244:Utqiaġvik 2174:Ketchikan 2124:Fairbanks 2119:Anchorage 2094:Southeast 2052:Southwest 1981:Elections 1976:Education 1867:Geography 1842:(capital) 1697:Kawaikini 1632:Star Peak 1342:Mauna Loa 1202:Haleakalā 1162:Mauna Kea 998:0895-0695 859:0258-8900 441:Шишалдина 379:chain of 241:Volcanic 150:Geography 65:Isolation 45:Elevation 2483:Kusilvak 2347:Wrangell 2254:Boroughs 2239:Wrangell 2224:Unalaska 2219:Soldotna 2184:Kotzebue 2069:Interior 2027:The Bush 2006:Politics 1986:Gun laws 1951:Cannabis 1946:Abortion 1921:Wildlife 1707:Arc Dome 584:See also 480:Climbing 447:Activity 268:Climbing 212:Topo map 2463:Chugach 2352:Yakutat 2342:Skagway 2234:Wasilla 2154:Cordova 2020:Regions 1971:Economy 1939:Society 1911:Symbols 1896:History 1872:Geology 1862:Climate 1782:Kamakou 1074:Bibcode 978:Bibcode 925:Bibcode 886:Bibcode 839:Bibcode 493:Gallery 432:Sisagux 383:in the 375:in the 369:volcano 224:Geology 75:Listing 2458:Bethel 2292:Juneau 2287:Haines 2277:Denali 2229:Valdez 2209:Seward 2199:Palmer 2179:Kodiak 2149:Bethel 2129:Juneau 2032:Arctic 2011:Sports 1906:People 1849:Topics 1839:Juneau 1829:Alaska 1157:Denali 1022:  996:  857:  808:  776:  458:Pavlof 454:Akutan 426:Sisquk 421:Aleuts 381:Alaska 2337:Sitka 2214:Sitka 2169:Kenai 2164:Homer 1961:Crime 1901:Music 1857:Index 1825:State 397:somma 328:, or 91:115th 2488:Nome 2189:Nome 1020:ISBN 994:ISSN 855:ISSN 806:ISBN 774:ISBN 456:and 419:The 415:Name 311:1967 263:2023 247:belt 217:USGS 103:10th 97:20th 85:28th 1827:of 1082:doi 1070:151 986:doi 933:doi 921:145 894:doi 882:166 847:doi 802:439 462:and 429:or 371:on 243:arc 2538:: 1080:, 1068:, 1051:. 1045:. 1006:^ 992:. 984:. 974:91 972:. 968:. 931:. 919:. 915:. 892:. 880:. 876:. 853:. 845:. 835:64 833:. 829:. 804:. 788:^ 772:. 770:48 743:. 360:ən 184:, 1817:e 1810:t 1803:v 1137:e 1130:t 1123:v 1103:) 1099:( 1084:: 1076:: 1055:. 1028:. 1000:. 988:: 980:: 939:. 935:: 927:: 900:. 896:: 888:: 861:. 849:: 841:: 814:. 782:. 753:. 363:/ 357:d 354:l 351:æ 348:ʃ 345:ˈ 342:ɪ 339:ʃ 336:/ 332:( 245:/

Index


Elevation
Prominence
Isolation
Listing
Highest ocean islands
World prominent peaks
North America prominent
North America isolated peak
Coordinates
54°45′21″N 163°58′03″W / 54.75583°N 163.96750°W / 54.75583; -163.96750
Mount Shishaldin is located in Alaska
Unimak Island
Alaska, U.S.
Parent range
Aleutian Range
Topo map
USGS
Mountain type
Stratovolcano
arc
belt
Aleutian Arc
Last eruption
First ascent
Easiest route
U.S. National Natural Landmark
/ʃɪˈʃældən/
volcano
Unimak Island

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