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1975 Morris earthquake

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32: 39: 273:. Many reports included extremely loud "bangs" and "explosions". These sounds led one to man think that a nearby gas plant had exploded. It was the most intense earthquake recorded in the region; had it occurred in a more populated area it may have caused a larger amount of damage. 249:. Seventeen earthquakes have occurred along the fault, the two largest being the Morris quake and the Staples event of 1917. Plotting of the earthquakes suggests that there may be another hidden fault in the state somewhat adjacent to it. 949: 640: 1432: 269:. Damage consisted of cracked plaster, falling items, and pictures being knocked off walls. The quake also cracked the foundations of two homes on East Fifth Street in 1442: 633: 1391: 508: 31: 969: 1422: 626: 225:
to be recorded on any seismic instrument in the state since 1917. Tremors were felt over much of Minnesota, northern Iowa, and the eastern Dakotas.
649: 320: 287: 1427: 778: 919: 693: 1310: 430: 399: 209:, or 9:54 a.m. local time. The strongest instrumentally recorded rupture in the history of the state, it registered at magnitude 4.6 M 135: 471: 1094: 698: 1330: 1079: 934: 62: 365: 954: 723: 501: 182: 1275: 1089: 999: 924: 834: 819: 663: 76: 1381: 1240: 1119: 1084: 1044: 839: 481: 1320: 1295: 1205: 1144: 914: 884: 753: 558: 434: 403: 369: 338: 477: 1325: 1265: 959: 894: 864: 854: 814: 773: 668: 1139: 1109: 1024: 1014: 979: 824: 758: 748: 543: 494: 743: 1396: 1315: 1220: 1164: 1114: 1099: 1074: 1054: 1039: 1009: 994: 989: 974: 944: 849: 793: 788: 708: 523: 520: 517: 282: 1437: 1355: 1285: 1210: 1200: 1169: 1159: 1149: 1134: 1064: 1019: 904: 889: 783: 763: 738: 713: 688: 673: 242: 51: 1417: 1305: 1280: 1185: 929: 909: 874: 809: 266: 234: 1345: 1290: 1270: 1260: 1255: 1250: 1215: 1154: 1129: 1059: 1004: 844: 683: 678: 576: 549: 258: 214: 1340: 1245: 1195: 1124: 939: 859: 733: 718: 703: 534: 1371: 1335: 1300: 1235: 1190: 1104: 1069: 1049: 1034: 984: 964: 899: 879: 869: 768: 728: 591: 1376: 1350: 1230: 1225: 829: 564: 1386: 582: 395: 233:
Minnesota is not a very tectonically active state but there is at least one fault zone in it, the
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The earthquake caused moderate damage and was defined as intensity VI on the
150: 137: 262: 202: 486: 261:. Minor damage to walls and basement foundations was reported around the 622: 490: 206: 339:"Region's earthquake stories sought for educational project" 463: 606:
indicates earthquake resulting in at least 30 deaths
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Seismicity of the United States, 1568–1989 (Revised)
1364: 1178: 802: 656: 174: 166: 129: 121: 110: 102: 87: 74: 61: 50: 319:, U.S. Geological Survey Professional Paper 1527, 341:. University of Minnesota Morris. Archived from 611:indicates the deadliest earthquake of the year 38: 634: 502: 8: 21: 1433:1975 natural disasters in the United States 641: 627: 619: 509: 495: 487: 20: 321:United States Government Printing Office 308: 306: 304: 302: 288:List of earthquakes in the United States 298: 400:"Quake Brings Mixed Reactions Locally" 16:Earthquake in Minnesota, United States 1443:July 1975 events in the United States 332: 330: 7: 313:Stover, C.W.; Coffman, J.L. (1993), 464:International Seismological Centre 14: 1423:Earthquakes in the United States 650:Earthquakes in the United States 429:Morris Tribune (July 10, 1975). 364:Morris Tribune (June 17, 1993). 37: 30: 482:United States Geological Survey 431:"Earthquake Shock Felt In Area" 175: 1428:Natural disasters in Minnesota 435:University of Minnesota Morris 404:University of Minnesota Morris 370:University of Minnesota Morris 1: 478:Today in Earthquake History 283:List of earthquakes in 1975 1459: 396:West Central Daily Tribune 366:"Background on fault . . " 1311:2018 Southern Appalachian 601: 530: 235:Great Lakes Tectonic Zone 26: 699:1812 San Juan Capistrano 259:Mercalli intensity scale 170:Minnesota, United States 125:5.0 mi (8 km) 1331:2020 Monte Cristo Range 1080:1986 North Palm Springs 935:1948 Desert Hot Springs 1382:2010–11 Guy-Greenbrier 955:1957 Andreanof Islands 779:1892 Vacaville–Winters 724:1867 Manhattan, Kansas 205:on July 9 at 14:54:15 199:1975 Morris earthquake 91:July 9, 1975 22:1975 Morris earthquake 1392:2009–present Oklahoma 1281:2014 Southeast Alaska 1276:2014 Aleutian Islands 1090:1987 Whittier Narrows 1000:1968 Borrego Mountain 950:1954 Churchill County 925:1946 Aleutian Islands 920:1944 Cornwall–Massena 820:1906 Aleutian Islands 664:1585 Aleutian Islands 221:). It was the first 1241:2010 Baja California 1095:1987 Imperial Valley 1085:1986 Chalfant Valley 1045:1979 Imperial Valley 840:1915 Pleasant Valley 835:1915 Imperial Valley 345:on September 6, 2002 201:occurred in western 1321:2020 Salt Lake City 1266:2013 Port Alexander 1206:2006 Gulf of Mexico 1120:1992 Cape Mendocino 885:1932 Cedar Mountain 754:1872 North Cascades 521:Earthquakes in 1975 441:on October 18, 2002 376:on February 7, 2009 147: /  57:1975-07-09 14:54:15 23: 1326:2020 Central Idaho 1145:1993 Klamath Falls 960:1957 San Francisco 915:1940 New Hampshire 895:1934 Hansel Valley 865:1925 Santa Barbara 855:1921 Sevier Valley 815:1906 San Francisco 774:1892 Laguna Salada 704:1812 Santa Barbara 694:1811–12 New Madrid 669:1638 New Hampshire 472:authoritative data 237:, stretching from 215:Mercalli intensity 213:and had a maximum 1438:1975 in Minnesota 1405: 1404: 1140:1993 Scotts Mills 1110:1991 Sierra Madre 1025:1975 Near Islands 1015:1971 San Fernando 980:1962 Cache Valley 825:1909 Wabash River 759:1882 Fort Collins 749:1872 Owens Valley 616: 615: 398:(July 10, 1975). 195: 194: 1450: 1418:1975 earthquakes 1221:2008 Chino Hills 1165:1999 Hector Mine 1115:1992 Joshua Tree 1100:1989 Loma Prieta 1075:1984 Morgan Hill 1055:1981 Westmorland 1040:1979 Coyote Lake 995:1965 Puget Sound 990:1965 Rat Islands 975:1959 Hebgen Lake 945:1952 Kern County 850:1918 San Jacinto 794:1899 San Jacinto 789:1898 Mare Island 709:1838 San Andreas 643: 636: 629: 620: 511: 504: 497: 488: 451: 450: 448: 446: 437:. Archived from 426: 420: 419: 417: 415: 406:. Archived from 392: 386: 385: 383: 381: 372:. Archived from 361: 355: 354: 352: 350: 334: 325: 324: 310: 239:Big Stone County 191: 189: 177: 162: 161: 159: 158: 157: 152: 148: 145: 144: 143: 140: 98: 96: 41: 40: 34: 24: 1458: 1457: 1453: 1452: 1451: 1449: 1448: 1447: 1408: 1407: 1406: 1401: 1397:2019 Ridgecrest 1360: 1356:2024 New Jersey 1316:2019 Ridgecrest 1286:2014 South Napa 1211:2006 Kiholo Bay 1201:2003 San Simeon 1174: 1170:2000 Yountville 1160:1998 Pymatuning 1150:1994 Northridge 1135:1992 St. George 1065:1983 Borah Peak 1020:1973 Point Mugu 1010:1969 Santa Rosa 970:1958 Lituya Bay 905:1936 State Line 890:1933 Long Beach 798: 784:1895 Charleston 764:1886 Charleston 739:1870 Charlevoix 714:1857 Fort Tejon 689:1783 New Jersey 674:1663 Charlevoix 652: 647: 617: 612: 607: 597: 526: 515: 474:for this event. 459: 454: 444: 442: 428: 427: 423: 413: 411: 410:on July 7, 2007 394: 393: 389: 379: 377: 363: 362: 358: 348: 346: 336: 335: 328: 312: 311: 300: 296: 279: 255: 243:Traverse County 231: 212: 183: 181: 155: 153: 149: 146: 141: 138: 136: 134: 133: 117: 103:Local time 94: 92: 88:Local date 46: 45: 44: 43: 42: 17: 12: 11: 5: 1456: 1454: 1446: 1445: 1440: 1435: 1430: 1425: 1420: 1410: 1409: 1403: 1402: 1400: 1399: 1394: 1389: 1384: 1379: 1374: 1368: 1366: 1362: 1361: 1359: 1358: 1353: 1348: 1343: 1338: 1333: 1328: 1323: 1318: 1313: 1308: 1306:2018 Anchorage 1303: 1298: 1293: 1288: 1283: 1278: 1273: 1268: 1263: 1258: 1253: 1248: 1243: 1238: 1233: 1228: 1223: 1218: 1213: 1208: 1203: 1198: 1193: 1188: 1186:2001 Nisqually 1182: 1180: 1176: 1175: 1173: 1172: 1167: 1162: 1157: 1152: 1147: 1142: 1137: 1132: 1127: 1122: 1117: 1112: 1107: 1102: 1097: 1092: 1087: 1082: 1077: 1072: 1067: 1062: 1057: 1052: 1047: 1042: 1037: 1032: 1027: 1022: 1017: 1012: 1007: 1002: 997: 992: 987: 982: 977: 972: 967: 962: 957: 952: 947: 942: 937: 932: 930:1947 Wisconsin 927: 922: 917: 912: 910:1940 El Centro 907: 902: 897: 892: 887: 882: 877: 875:1931 Valentine 872: 867: 862: 857: 852: 847: 842: 837: 832: 827: 822: 817: 812: 810:1901 Richfield 806: 804: 800: 799: 797: 796: 791: 786: 781: 776: 771: 766: 761: 756: 751: 746: 741: 736: 731: 726: 721: 716: 711: 706: 701: 696: 691: 686: 681: 676: 671: 666: 660: 658: 654: 653: 648: 646: 645: 638: 631: 623: 614: 613: 602: 599: 598: 596: 595: 589: 580: 574: 568: 562: 559:North Atlantic 556: 547: 541: 537:(6.8, Jan 19) 531: 528: 527: 516: 514: 513: 506: 499: 491: 485: 484: 475: 458: 457:External links 455: 453: 452: 421: 387: 356: 337:Tom Cherveny. 326: 297: 295: 292: 291: 290: 285: 278: 275: 267:Stevens County 254: 251: 230: 227: 210: 193: 192: 179: 172: 171: 168: 167:Areas affected 164: 163: 131: 127: 126: 123: 119: 118: 115: 112: 108: 107: 104: 100: 99: 89: 85: 84: 79: 72: 71: 66: 59: 58: 55: 48: 47: 36: 35: 29: 28: 27: 15: 13: 10: 9: 6: 4: 3: 2: 1455: 1444: 1441: 1439: 1436: 1434: 1431: 1429: 1426: 1424: 1421: 1419: 1416: 1415: 1413: 1398: 1395: 1393: 1390: 1388: 1385: 1383: 1380: 1378: 1375: 1373: 1370: 1369: 1367: 1363: 1357: 1354: 1352: 1349: 1347: 1346:2022 Ferndale 1344: 1342: 1339: 1337: 1334: 1332: 1329: 1327: 1324: 1322: 1319: 1317: 1314: 1312: 1309: 1307: 1304: 1302: 1299: 1297: 1294: 1292: 1291:2016 Oklahoma 1289: 1287: 1284: 1282: 1279: 1277: 1274: 1272: 1271:2014 La Habra 1269: 1267: 1264: 1262: 1261:2011 Oklahoma 1259: 1257: 1256:2011 Virginia 1254: 1252: 1251:2011 Colorado 1249: 1247: 1244: 1242: 1239: 1237: 1234: 1232: 1229: 1227: 1224: 1222: 1219: 1217: 1216:2008 Illinois 1214: 1212: 1209: 1207: 1204: 1202: 1199: 1197: 1194: 1192: 1189: 1187: 1184: 1183: 1181: 1177: 1171: 1168: 1166: 1163: 1161: 1158: 1156: 1155:1995 Marathon 1153: 1151: 1148: 1146: 1143: 1141: 1138: 1136: 1133: 1131: 1130:1992 Big Bear 1128: 1126: 1123: 1121: 1118: 1116: 1113: 1111: 1108: 1106: 1103: 1101: 1098: 1096: 1093: 1091: 1088: 1086: 1083: 1081: 1078: 1076: 1073: 1071: 1068: 1066: 1063: 1061: 1060:1983 Coalinga 1058: 1056: 1053: 1051: 1048: 1046: 1043: 1041: 1038: 1036: 1033: 1031: 1028: 1026: 1023: 1021: 1018: 1016: 1013: 1011: 1008: 1006: 1005:1968 Illinois 1003: 1001: 998: 996: 993: 991: 988: 986: 983: 981: 978: 976: 973: 971: 968: 966: 963: 961: 958: 956: 953: 951: 948: 946: 943: 941: 938: 936: 933: 931: 928: 926: 923: 921: 918: 916: 913: 911: 908: 906: 903: 901: 898: 896: 893: 891: 888: 886: 883: 881: 878: 876: 873: 871: 868: 866: 863: 861: 858: 856: 853: 851: 848: 846: 845:1916 Irondale 843: 841: 838: 836: 833: 831: 828: 826: 823: 821: 818: 816: 813: 811: 808: 807: 805: 801: 795: 792: 790: 787: 785: 782: 780: 777: 775: 772: 770: 767: 765: 762: 760: 757: 755: 752: 750: 747: 745: 742: 740: 737: 735: 732: 730: 727: 725: 722: 720: 717: 715: 712: 710: 707: 705: 702: 700: 697: 695: 692: 690: 687: 685: 684:1755 Cape Ann 682: 680: 679:1700 Cascadia 677: 675: 672: 670: 667: 665: 662: 661: 659: 655: 651: 644: 639: 637: 632: 630: 625: 624: 621: 610: 605: 600: 594:(7.2, Nov 29) 593: 590: 588: 585:(6.7, Sep 6) 584: 581: 578: 575: 573:(4.3, July 9) 572: 569: 567:(7.0, July 8) 566: 563: 561:(7.9, May 26) 560: 557: 555: 552:(7.3, Feb 4) 551: 548: 545: 542: 540: 536: 533: 532: 529: 525: 522: 519: 512: 507: 505: 500: 498: 493: 492: 489: 483: 479: 476: 473: 469: 465: 461: 460: 456: 440: 436: 432: 425: 422: 409: 405: 401: 397: 391: 388: 375: 371: 367: 360: 357: 344: 340: 333: 331: 327: 323:, p. 258 322: 318: 317: 309: 307: 305: 303: 299: 293: 289: 286: 284: 281: 280: 276: 274: 272: 268: 264: 260: 252: 250: 248: 244: 240: 236: 228: 226: 224: 220: 216: 208: 204: 200: 190: 187: 180: 173: 169: 165: 160: 151:45.5°N 96.1°W 132: 128: 124: 120: 113: 109: 105: 101: 90: 86: 83: 80: 78: 73: 70: 67: 64: 60: 56: 53: 49: 33: 25: 19: 1387:2012 Brawley 1341:2021 Chignik 1246:2010 Indiana 1196:2003 Alabama 1179:21st century 1125:1992 Landers 1029: 940:1949 Olympia 860:1925 Montana 803:20th century 734:1868 Hayward 719:1865 Memphis 608: 603: 586: 579:(6.1, Aug 1) 570: 553: 546:(7.6, Feb 2) 544:Near Islands 538: 468:bibliography 445:December 19, 443:. Retrieved 439:the original 424: 414:December 19, 412:. Retrieved 408:the original 390: 380:December 19, 378:. Retrieved 374:the original 359: 349:December 19, 347:. Retrieved 343:the original 315: 256: 232: 218: 198: 196: 185: 18: 1336:2020 Sparta 1301:2018 Hawaii 1296:2018 Alaska 1236:2010 Eureka 1191:2002 Denali 1105:1990 Upland 1070:1983 Kaoiki 1050:1980 Eureka 1035:1975 Hawaii 1030:1975 Morris 985:1964 Alaska 965:1958 Huslia 900:1935 Helena 880:1932 Eureka 870:1927 Lompoc 769:1887 Sonora 744:1871 LānaĘťi 729:1868 Hawaii 156:45.5; -96.1 154: / 65: event 1412:Categories 1372:2001 Enola 1351:2023 Texas 1231:2008 Wells 657:Historical 294:References 223:earthquake 95:1975-07-09 54: time 1377:2008 Reno 1226:2008 Reno 830:1914 Reno 263:epicenter 203:Minnesota 178:intensity 130:Epicenter 111:Magnitude 577:Oroville 550:Haicheng 277:See also 184:MMI VI ( 535:Kinnaur 470:and/or 229:Setting 217:of VI ( 142:96°06′W 139:45°30′N 93: ( 1365:Swarms 592:Hawaii 571:Morris 466:has a 271:Morris 253:Damage 247:Duluth 219:Strong 186:Strong 82:ComCat 69:726019 565:Bagan 122:Depth 114:4.6 M 75:USGS- 583:Lice 462:The 447:2008 416:2008 382:2008 351:2008 241:and 197:The 176:Max. 106:9:54 77:ANSS 265:in 245:to 207:UTC 63:ISC 52:UTC 1414:: 554:†‡ 480:– 433:. 402:. 368:. 329:^ 301:^ 642:e 635:t 628:v 609:‡ 604:† 587:† 539:† 524:→ 518:← 510:e 503:t 496:v 449:. 418:. 384:. 353:. 211:n 188:) 116:n 97:)

Index

1975 Morris earthquake is located in the United States
UTC
ISC
726019
ANSS
ComCat
45°30′N 96°06′W / 45.5°N 96.1°W / 45.5; -96.1
MMI VI (Strong)
Minnesota
UTC
Mercalli intensity
earthquake
Great Lakes Tectonic Zone
Big Stone County
Traverse County
Duluth
Mercalli intensity scale
epicenter
Stevens County
Morris
List of earthquakes in 1975
List of earthquakes in the United States




Seismicity of the United States, 1568–1989 (Revised)
United States Government Printing Office

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