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Seismic risk in Malta

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1119:...At 5 pm, a violent earthquake shook the Maltese isles. It lasted for seven minutes. It left great damage on the two isles. At Gozo, the church of Saint George, Saint James and the chapel of Notre-Dame at Qala were greatly damaged. In Malta, the church of St John at Valletta, the cathedral of Mdina and many other churches were also effected. At Wardija, near Qala, people are said to have seen the earth rise and fall with such force that the soil seemed to remain floating in the air, creating a dust cloud that remained for a long time. Many of the hills in Gozo crumbled. 32: 1155: 1061: 1211: 989: 1170:
as the newspapers of the era testify. People were woken in the middle of the night by a deafening growl and a movement of the earth that lasted between 22 and 60 seconds. Nearly all the houses in Valletta were damaged, as were houses in Gozo, notably on the upper floors. Numerous churches were affected, and in particular the cathedral of Mdina. The belltower of the
1169:
was very seriously hit by the particularly violent earthquake of 12 October 1856. Certain seismic registers attribute it with a magnitude of 8.2. It claimed numerous victims in Crete. Despite being at a distance of more than 1000 km from the epicentre, the earthquake was violently felt in Malta,
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The risk of a tsunami wave between 4 m and 7 m high is estimated as a possibility every 600 to 1500 years. The occurrence of an event comparable to that of 1603, could have grave social and economic consequences as areas near the sea are largely built up, in particular for tourist activity
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have been imposed as the rate of construction accelerates and numerous buildings are completed. The risk is increased further by building in unreinforced masonry, incorporating heavy floors and concrete roofs with often large cellars used as garages. This type of construction is particularly
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In Malta, the earthquake provoked panic among the population, with many Maltese refusing to go back to their homes in the nights that followed, seeking refuge in tents or underground shelters. No injuries or fatalities were reported. The
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of 7.4, it is considered to be the most powerful earthquakes in Italian history. The earthquake was preceded on 9 January by a precursory earthquake of a magnitude of around 5.9 which was strongly felt but did not cause damage.
1139:
An account by six architects described three large cracks of around 3 cm in width on each side of the cupola, revealing most of the stones in the cupola and the terrible damage to the walls of the choir.
1198:. Once again, the local papers reported a general panic in the population that rushed outside dwellings, awoken by the earthquake on 27 August 1886. Some buildings were affected, including the ceiling of the 1333:
8 happening every 1000 years and an event at intensity 6 happening every 92 years. Historically, since 1530, an earthquake of 7–8 intensity has been reported, as well as at least four events of intensity 7.
133:
Prior to the 20th century and the first seismic recordings in the region, information on Maltese earthquakes was researched in archives. These range mostly from the arrival of the knights of the
1224:
30 September 1911 earthquake was more distinctly felt in Gozo than in Malta. Newspapers reported the appearance of deep cracks in the domes and the belltowers of many churches, in particular at
1305:. At least three large waves caused significant damage and took a number of victims in the east of Sicily. The waves of this tsunami hit the shores of Malta an hour later, causing flooding at 1517: 1252:
seismograph at Valletta. It seems not to have worked and gave no useful information; the seismologic data is therefore not clear. The shock seems to have been most felt around the
1256:. Some damage was reported, such as the falling of the stone crosses on churches or cracks in the domes. The greatest ravages seem to have been those exerted on the 1581: 1282: 1105: 1041:
was part destroyed – but the cathedral was already badly damaged before the earthquake, and so a reconstruction had already been planned. The
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is considered to be low with little historic damage noted and no known victims. The archipelago is however in a potentially significant
1525: 1080: 95:(sometimes west–east) with dextral cavities that are responsible for most of the earthquakes that can affect the archipelago. 1064: 1046: 1038: 1018: 134: 370: 310: 1330: 1191: 1087: 822: 767: 711: 649: 541: 481: 207: 180: 173: 1057:
suffered considerable damage, it was situated at a high altitude which was particularly susceptible to earthquakes.
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was badly hit. Many landslides were reported on the isle of Gozo. In Malta, damage was limited to a few cracks.
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reports that the earthquake of 10 December 1542 was strongly felt in Malta where some houses were knocked down.
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has been relatively limited, mostly due to an inadequate network of seismic stations, particularly before 1980.
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was destroyed and the bell tower heavily damaged. The cathedral was so cracked in all areas that:
1391:"Seismic history of the Maltese islands and considerations on seismic risk: Earthquakes in Malta" 1236:, where many public buildings were affected. Numerous rural buildings were completely destroyed. 1079:
were damaged, but Blondel notes that the damage were more likely caused by years of neglect. The
1025:, no building escaped unharmed by the earthquake, from simple cracks to complete demolition. The 1154: 1037:
suffered more greatly as many of the buildings were older and were poorly maintained. Notably,
1586: 1302: 1076: 1060: 873: 759: 703: 616: 591: 448: 423: 146: 138: 99: 68: 1317:, the sea came and went with force. The sea level was registered as abnormally high in the 92: 44: 1135:...Even the sound of the bell didn't dare to enter for fear of seeing the building fall. 1086:
The considerable material damage in Malta has been attributed to the maximum earthquake
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The tsunami of 16 January 1693 occurred contemporaneously with the strong earthquake.
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at Mdina was so cracked that it needed to be rebuilt. The chapel on the islet of
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Boschi, E.; Guidoboni, G.; Mariotti, D.; Valensise, G.; Gasperini, P. (2000).
1310: 1249: 1115:, a two-volume manuscript dealing with the history of Gozo completed in 1746: 815: 641: 363: 52: 1321:. Many fishing boats were damaged or destroyed, but no deaths were reported. 1127:(the little dome) of the cathedral fell into the church, the back end of the 895: 882: 837: 824: 782: 769: 726: 713: 664: 651: 556: 543: 496: 483: 385: 372: 325: 312: 222: 209: 1004:
is the most significant earthquake felt in Malta since the 16th century. In
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18 September 1923 earthquake was the first to follow the installation of a
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a foaming wave crossed the main road hitting the church of St. Peter. At
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in Valletta. For once, the cathedral in Mdina was not greatly affected.
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A document in the archives of the cathedral of Mdina described how the
1053:, the bell tower and the apse of the church of St. Paul came down. The 1021:
delegated its head engineer, Mederico Blondel to assess the damage. At
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collapsed in this earthquake and has remained in ruins ever since.
1067:, rebuilt after the 1693 earthquake, damaged by the 1743 earthquake 1487: 1306: 1225: 1209: 1166: 1153: 1059: 1034: 987: 534: 91:. These grabens are linked by a system of north–south orientation 84: 60: 51:. The islands are situated around 200 km to the south of the 40: 30: 1218: 1072: 1427:"Catalogue of Strong Italian Earthquakes from 461 B.C. to 1997" 1268:
was badly damaged and remained unused for more than 70 years.
1045:
in Mdina was equally damaged, and would be rebuilt in 1726 by
59:. The pelagic plate forms a shallow platform separating the 1008:, it caused the death of around 60,000 individuals. With a 1033:
were considerably less affected. However, the old city of
23:
and the risk to the population is probably undervalued.
1476:"The Crypt and Church of S. Marija tal-Virtù at Rabat" 1289:
turned a thousand times before returning with force.
1297:The tsunami of 28 December 1908 corresponds to the 35:
Map of tectonic plates in the Eastern Mediterranean
1501:Agius de Soldanis, Gian Pietro Francesco (1746). 1133: 1117: 1546:"Tsunami Risks in the Mediterranean – Part 2" 1480:Elita Historica: A Journal of Maltese History 1309:, where part of the old town was damaged. At 141:. After this period, the localisation of the 8: 1108:recounts 20 February 1743 earthquake in his 1002:earthquake of 11 January 1693 in Val di Noto 996:dating from 1696 on the Sicilian earthquake 1329:Seismic risk was evaluated at an event of 1346:Integration of risk in building standards 1161:, which collapsed in the 1856 earthquake 156: 55:fault between the African Plate and the 1364: 1106:Gian Pietro Francesco Agius de Soldanis 153:Summary table of earthquakes since 1500 1582:Earthquake and seismic risk mitigation 1505:(in Italian). PLG, Biblioteca ms. 243. 1503:Il Gozo Antico-Moderno e Sacro-Profano 1113:Il Gozo Antico-Moderno e Sacro-Profano 978:Sicilian Chronicle of the 16th century 1539: 1537: 1535: 1420: 1418: 1416: 1384: 1382: 1380: 1378: 1376: 1374: 1372: 1370: 1368: 7: 1449:"Tremor of 5.3 magnitude hits Malta" 1518:"Għajn Ħadid Tower and Aħrax Tower" 1516:Mifsud, Simon (24 December 2012). 47:, a relatively stable part of the 14: 1081:Cathedral of the Assumption, Gozo 1178:was destroyed. The 17th-century 1244:Earthquake of 18 September 1923 1206:Earthquake of 30 September 1911 1094:Earthquake of 20 February 1743 972:Earthquake of 10 December 1542 1: 1144:Earthquake of 12 October 1856 984:Earthquake of 11 January 1693 166:Localisation of the epicentre 139:British colonisation of Malta 135:Order of St John of Jerusalem 67:, situated roughly under the 1486:(4): 326–345. Archived from 1350:Despite a proposed bill, no 1186:Earthquake of 27 August 1886 1165:The epicentre situated near 967:Details of major earthquakes 71:. The plate is crossed by a 1293:Tsunami of 28 December 1908 1065:St. Paul's Cathedral, Mdina 1047:Charles François de Mondion 196:10 December at around 15:15 1603: 1544:Camilleri, Dennis (2005). 1355:sensitive to earthquakes. 1352:seismic building standards 1325:Evaluation of seismic risk 1277:Tsunami of 16 January 1693 1192:earthquake on the same day 1147: 1097: 700:30 September, around 09:25 1272:Details of major tsunamis 1150:1856 Heraklion earthquake 470:11 January, around midday 360:20 February, around 16:30 129:List of major earthquakes 1522:MilitaryArchitecture.com 1474:Buhagiar, Mario (1979). 1285:recounts how the sea at 1172:church of the Carmelites 588:8 February, around 23:45 531:12 October, around 00:45 299:11 January, around 13:30 1389:Galea, Pauline (2007). 1100:1743 Salento earthquake 638:27 August, around 22:00 613:15 August, around 02:45 63:basin from the Western 1221: 1190:This was probably the 1162: 1137: 1121: 1068: 997: 756:18 September, at 07:30 145:of earthquakes in the 36: 1213: 1157: 1083:lost its bell tower. 1063: 991: 34: 17:Seismic risk in Malta 1431:Annals of Geophysics 1395:Annals of Geophysics 1039:St. Paul's Cathedral 948:22 April at 12.20am 445:26 February, morning 186:Earthquake magnitude 1194:that struck the SW 1075:, the walls of the 892: /  834: /  779: /  723: /  661: /  553: /  493: /  420:19 January, morning 382: /  322: /  219: /  118:, belonging to the 65:Mediterranean Basin 41:Maltese Archipelago 1528:on 23 August 2017. 1222: 1163: 1069: 998: 953:35.026°N 15.219°E 100:islands themselves 45:underwater plateau 37: 1338:in the region of 1303:Strait of Messina 1283:Agius de Soldanis 1258:church of St Paul 1200:Palace of Justice 1180:Għajn Ħadid Tower 1159:Għajn Ħadid Tower 964: 963: 931:Sicilian Channel 870:21 March at 23:06 1594: 1577:Geology of Malta 1561: 1560: 1550: 1541: 1530: 1529: 1524:. Archived from 1513: 1507: 1506: 1498: 1492: 1491: 1490:on 3 March 2016. 1471: 1465: 1464: 1462: 1460: 1445: 1439: 1438: 1422: 1411: 1410: 1408: 1406: 1386: 1266:Tal-Virtù Church 1104:Local historian 1055:Tal-Virtù Church 994:copper engraving 907: 906: 904: 903: 902: 897: 893: 890: 889: 888: 885: 874:Sicilian Channel 849: 848: 846: 845: 844: 839: 835: 832: 831: 830: 827: 812:26 June at 19:46 794: 793: 791: 790: 789: 784: 780: 777: 776: 775: 772: 760:Sicilian Channel 738: 737: 735: 734: 733: 728: 724: 721: 720: 719: 716: 704:Sicilian Channel 676: 675: 673: 672: 671: 666: 662: 659: 658: 657: 654: 617:Sicilian Channel 592:Sicilian Channel 568: 567: 565: 564: 563: 558: 554: 551: 550: 549: 546: 508: 507: 505: 504: 503: 498: 494: 491: 490: 489: 486: 449:Sicilian Channel 424:Sicilian Channel 397: 396: 394: 393: 392: 387: 383: 380: 379: 378: 375: 337: 336: 334: 333: 332: 327: 323: 320: 319: 318: 315: 257:8 March, morning 234: 233: 231: 230: 229: 224: 220: 217: 216: 215: 212: 157: 147:Sicilian Channel 83:graben, that of 75:formed of three 69:Strait of Sicily 1602: 1601: 1597: 1596: 1595: 1593: 1592: 1591: 1567: 1566: 1565: 1564: 1548: 1543: 1542: 1533: 1515: 1514: 1510: 1500: 1499: 1495: 1473: 1472: 1468: 1458: 1456: 1455:. 22 April 2023 1447: 1446: 1442: 1424: 1423: 1414: 1404: 1402: 1388: 1387: 1366: 1361: 1348: 1327: 1295: 1279: 1274: 1246: 1208: 1188: 1152: 1146: 1102: 1096: 1043:Banca Giuratale 986: 974: 969: 920: 913: 900: 898: 894: 891: 886: 883: 881: 879: 878: 862: 855: 842: 840: 836: 833: 828: 825: 823: 821: 820: 800: 787: 785: 781: 778: 773: 770: 768: 766: 765: 744: 731: 729: 725: 722: 717: 714: 712: 710: 709: 692: 687: 682: 669: 667: 663: 660: 655: 652: 650: 648: 647: 626: 601: 580: 573: 561: 559: 555: 552: 547: 544: 542: 540: 539: 523: 518: 513: 501: 499: 495: 492: 487: 484: 482: 480: 479: 458: 433: 412: 407: 402: 390: 388: 386:39.87°N 18.78°E 384: 381: 376: 373: 371: 369: 368: 352: 347: 342: 330: 328: 326:37.18°N 15.02°E 324: 321: 316: 313: 311: 309: 308: 287: 266: 249: 244: 239: 227: 225: 223:37.20°N 14.90°E 221: 218: 213: 210: 208: 206: 205: 155: 137:in 1530 to the 131: 106:rocks from the 102:are made up of 29: 12: 11: 5: 1600: 1598: 1590: 1589: 1584: 1579: 1569: 1568: 1563: 1562: 1531: 1508: 1493: 1466: 1453:Times of Malta 1440: 1412: 1363: 1362: 1360: 1357: 1347: 1344: 1326: 1323: 1294: 1291: 1278: 1275: 1273: 1270: 1245: 1242: 1234:Ir-Rabat, Gozo 1207: 1204: 1187: 1184: 1148:Main article: 1145: 1142: 1098:Main article: 1095: 1092: 985: 982: 973: 970: 968: 965: 962: 961: 958: 956: 954: 951: 949: 946: 942: 941: 938: 936: 934: 932: 929: 926: 922: 921: 918: 916: 914: 911: 909: 876: 871: 868: 864: 863: 860: 858: 856: 853: 851: 818: 813: 810: 806: 805: 803: 801: 798: 796: 763: 757: 754: 750: 749: 747: 745: 742: 740: 707: 701: 698: 694: 693: 690: 688: 685: 683: 680: 678: 645: 639: 636: 632: 631: 629: 627: 624: 622: 620: 614: 611: 607: 606: 604: 602: 599: 597: 595: 589: 586: 582: 581: 578: 576: 574: 571: 569: 537: 532: 529: 525: 524: 521: 519: 516: 514: 511: 509: 477: 471: 468: 464: 463: 461: 459: 456: 454: 452: 446: 443: 439: 438: 436: 434: 431: 429: 427: 421: 418: 414: 413: 410: 408: 405: 403: 400: 398: 366: 361: 358: 354: 353: 350: 348: 345: 343: 340: 338: 306: 300: 297: 293: 292: 290: 288: 285: 283: 281: 279: 276: 272: 271: 269: 267: 264: 262: 260: 258: 255: 251: 250: 247: 245: 242: 240: 237: 235: 203: 197: 194: 190: 189: 183: 177: 170: 167: 164: 161: 154: 151: 130: 127: 87:, and that of 57:Eurasian Plate 28: 25: 13: 10: 9: 6: 4: 3: 2: 1599: 1588: 1585: 1583: 1580: 1578: 1575: 1574: 1572: 1558: 1554: 1553:The Architect 1547: 1540: 1538: 1536: 1532: 1527: 1523: 1519: 1512: 1509: 1504: 1497: 1494: 1489: 1485: 1481: 1477: 1470: 1467: 1454: 1450: 1444: 1441: 1437:(4): 609–868. 1436: 1432: 1428: 1421: 1419: 1417: 1413: 1400: 1396: 1392: 1385: 1383: 1381: 1379: 1377: 1375: 1373: 1371: 1369: 1365: 1358: 1356: 1353: 1345: 1343: 1341: 1335: 1332: 1324: 1322: 1320: 1319:Grand Harbour 1316: 1312: 1308: 1304: 1300: 1292: 1290: 1288: 1284: 1276: 1271: 1269: 1267: 1263: 1259: 1255: 1254:Grand Harbour 1251: 1243: 1241: 1239: 1238:Fort Chambray 1235: 1231: 1227: 1220: 1216: 1215:Fort Chambray 1212: 1205: 1203: 1201: 1197: 1193: 1185: 1183: 1181: 1177: 1173: 1168: 1160: 1156: 1151: 1143: 1141: 1136: 1132: 1130: 1126: 1120: 1116: 1114: 1111: 1107: 1101: 1093: 1091: 1089: 1084: 1082: 1078: 1074: 1066: 1062: 1058: 1056: 1052: 1048: 1044: 1040: 1036: 1032: 1031:Grand Harbour 1028: 1024: 1020: 1014: 1011: 1007: 1003: 995: 990: 983: 981: 979: 971: 966: 959: 957: 955: 952: 950: 947: 944: 943: 939: 937: 935: 933: 930: 927: 924: 923: 917: 915: 910: 905: 877: 875: 872: 869: 866: 865: 859: 857: 852: 847: 838:36.5°N 27.5°E 819: 817: 814: 811: 808: 807: 804: 802: 797: 792: 783:35.5°N 14.5°E 764: 761: 758: 755: 752: 751: 748: 746: 741: 736: 727:36.4°N 13.5°E 708: 705: 702: 699: 696: 695: 689: 684: 679: 674: 665:36.4°N 27.2°E 646: 643: 640: 637: 634: 633: 630: 628: 623: 621: 618: 615: 612: 609: 608: 605: 603: 598: 596: 593: 590: 587: 584: 583: 577: 575: 570: 566: 557:37.2°N 15.2°E 538: 536: 533: 530: 527: 526: 520: 515: 510: 506: 497:37.2°N 15.2°E 478: 476: 472: 469: 466: 465: 462: 460: 455: 453: 450: 447: 444: 441: 440: 437: 435: 430: 428: 425: 422: 419: 416: 415: 409: 404: 399: 395: 367: 365: 362: 359: 356: 355: 349: 344: 339: 335: 307: 305: 301: 298: 295: 294: 291: 289: 284: 282: 280: 277: 274: 273: 270: 268: 263: 261: 259: 256: 253: 252: 246: 241: 236: 232: 204: 202: 198: 195: 192: 191: 187: 184: 182: 178: 175: 171: 168: 165: 162: 159: 158: 152: 150: 148: 144: 140: 136: 128: 126: 124: 121: 117: 113: 109: 105: 101: 96: 94: 90: 86: 82: 78: 74: 70: 66: 62: 58: 54: 50: 49:African Plate 46: 42: 33: 26: 24: 22: 18: 1556: 1552: 1526:the original 1521: 1511: 1502: 1496: 1488:the original 1483: 1479: 1469: 1457:. Retrieved 1452: 1443: 1434: 1430: 1403:. Retrieved 1401:(6): 725–740 1398: 1394: 1349: 1336: 1328: 1296: 1280: 1262:Rabat, Malta 1247: 1223: 1189: 1164: 1138: 1134: 1124: 1122: 1118: 1112: 1103: 1085: 1070: 1042: 1015: 999: 977: 975: 928:22 November 391:39.87; 18.78 331:37.18; 15.02 228:37.20; 14.90 132: 97: 43:rests on an 38: 21:seismic zone 16: 15: 1559:(4): 18–19. 1196:Peloponnese 1110:magnum opus 1027:other towns 899: / 896:35.8°N 15°E 841: / 786: / 730: / 668: / 560: / 500: / 389: / 329: / 278:1 September 226: / 179:Earthquake 169:Coordinates 114:geological 81:Pantelleria 1571:Categories 1359:References 1311:Marsaxlokk 1299:earthquake 1077:Cittadella 843:36.5; 27.5 816:Aegean Sea 788:35.5; 14.5 732:36.4; 13.5 670:36.4; 27.2 642:Aegean Sea 562:37.2; 15.2 502:37.2; 15.2 364:Ionian Sea 143:epicentres 53:subduction 1331:intensity 1125:coppolino 1088:intensity 1010:magnitude 181:intensity 174:intensity 108:Oligocene 104:limestone 73:rift zone 27:Tectonics 1587:Tsunamis 1090:of 7–8. 1023:Valletta 901:35.8; 15 625:5 ? 600:5 ? 473:East of 457:5 ? 432:5 ? 302:East of 286:5 ? 265:5 ? 199:East of 176:in Malta 172:Maximum 120:Cenozoic 1301:in the 1029:of the 992:German 908: ? 887:15°00′E 884:35°48′N 850: ? 829:27°30′E 826:36°30′N 795: ? 774:14°30′E 771:35°30′N 762: ? 739: ? 718:13°30′E 715:36°24′N 706: ? 677: ? 656:27°12′E 653:36°24′N 644: ? 619: ? 594: ? 548:15°12′E 545:37°12′N 488:15°12′E 485:37°12′N 451: ? 426: ? 377:18°47′E 374:39°52′N 317:15°01′E 314:37°11′N 214:14°54′E 211:37°12′N 112:Miocene 77:grabens 1459:20 May 1405:5 June 1340:Sliema 1315:Sliema 1287:Xlendi 1264:. The 1232:, and 1176:Filfla 1006:Sicily 475:Sicily 304:Sicily 201:Sicily 116:epochs 93:faults 89:Linosa 79:: the 61:Ionian 1549:(PDF) 1307:Msida 1250:Milne 1230:Għarb 1226:Nadur 1167:Crete 1129:choir 1051:Rabat 1049:. At 1035:Mdina 1019:Order 945:2023 925:2022 535:Crete 188:(Mw) 85:Malta 1461:2023 1407:2015 1219:Gozo 1073:Gozo 1000:The 976:The 960:5.3 940:4.6 867:1972 809:1926 753:1923 697:1911 635:1886 610:1886 585:1856 528:1856 467:1848 442:1793 417:1789 357:1743 296:1693 275:1636 254:1562 193:1542 163:Date 160:Year 110:and 98:The 39:The 1260:in 1217:in 1071:At 919:4.5 861:7.6 691:7.3 681:6–7 579:7.7 522:5.5 517:8–9 411:6.9 351:7.4 341:7–8 248:6.6 123:era 1573:: 1557:34 1555:. 1551:. 1534:^ 1520:. 1482:. 1478:. 1451:. 1435:43 1433:. 1429:. 1415:^ 1399:50 1397:. 1393:. 1367:^ 1342:. 1228:, 686:11 243:10 125:. 1484:7 1463:. 1409:. 912:5 854:5 799:6 743:7 572:7 512:5 406:9 401:7 346:9 238:7

Index

seismic zone

Maltese Archipelago
underwater plateau
African Plate
subduction
Eurasian Plate
Ionian
Mediterranean Basin
Strait of Sicily
rift zone
grabens
Pantelleria
Malta
Linosa
faults
islands themselves
limestone
Oligocene
Miocene
epochs
Cenozoic
era
Order of St John of Jerusalem
British colonisation of Malta
epicentres
Sicilian Channel
intensity
intensity
Earthquake magnitude

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