List of earthquakes in 1933 explained

Year:1933
Location Map:Earth
Largest: Japan, off the east coast of Honshu, (Magnitude 8.4) March 2
Deadliest: China, Sichuan Province (Magnitude 7.3) August 25 9,300 deaths
Fatalities:13,368
9.0+:0
8.0−8.9:1
7.0−7.9:10
6.0−6.9:99
5.0−5.9:1

This is a list of earthquakes in 1933. Only magnitude 6.0 or greater earthquakes appear on the list. Lower magnitude events are included if they have caused death, injury or damage. Events which occurred in remote areas will be excluded from the list as they wouldn't have generated significant media interest. All dates are listed according to UTC time. The biggest event of the year was the great Japan earthquake which struck early in March. A little over a week later saw southern California's deadliest earthquake to date, and a major shock in southern Sumatra left over 780 dead. China had the deadliest event in August with over 9,300 deaths.

Overall

By death toll

RankDeath tollMagnitudeLocationMMIDepth (km)Date
1 China, Sichuan Province
2 Japan, off the east coast of Honshu
3, southern Sumatra
4 China, Sichuan Province
5+ Greece, off the coast of Kos
6 United States, off the coast of California
7 Italy, Abruzzo

By magnitude

RankMagnitudeDeath tollLocationMMIDepth (km)Date
1 Japan, off the east coast of Honshu
2788, southern Sumatra
3 United Kingdom, South Sandwich Islands
4 Canada, Baffin Bay
5 China, Sichuan Province
= 6 Chile, Tarapaca Region
= 6 Japan, off the east coast of Honshu
= 7Southwest Indian Ridge
= 7 Fiji
= 8
= 8 Argentina, Jujuy Province

Notable events

January

Month:January
8.0–8.9:0
7.0–7.9:2
6.0–6.9:8
Largest:7.1 Mw Southwest Indian Ridge
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[1] 7.0 135.0
[2] 6.4 20.0
[3] 6.6 15.0
[4] 6.0 35.0 Aftershock.
[5] 6.5 230.0
[6] , off the east coast 6.2 140.0
[7] 6.5 570.0
[8] 7.1 10.0
[9] 6.2 90.0
[10] Samoa, south of 6.5 15.0

February

Month:February
8.0–8.9:0
7.0–7.9:1
6.0–6.9:2
Largest:7.2 Mw Chile
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[11] 6.4 10.0
[12] 6.5 60.0
[13] 7.2 35.0

March

Month:March
8.0–8.9:1
7.0–7.9:0
6.0–6.9:12
Largest:8.4 Mw Japan
Deadliest:8.4 Mw Japan
3,022 deaths
Fatalities:3,142
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[14] [15] [16] 8.4 15.0 The 1933 Sanriku earthquake caused the destruction of many homes. A tsunami was triggered and caused 3,022 deaths. 6,000 homes were destroyed. 3,022
[17] 6.5 35.0 Aftershock.
[18] 6.5 120.0
[19] 6.4 15.0 Aftershock.
[20] 6.3 15.0 Aftershock.
[21] 6.0 35.0 Aftershock.
[22] 6.0 35.0 Aftershock.
[23] [24] 6.4 6.0 The 1933 Long Beach earthquake caused 120 deaths and extensive property damage. Costs were around $40 million (1933 rate). Many schools were damaged which led to changes in building codes. 120
[25] 6.8 480.0
[26] 6.6 35.0
[27] 6.7 35.0
[28] 6.5 170.0
[29] 6.0 35.0

April

Month:April
8.0–8.9:0
7.0–7.9:0
6.0–6.9:8
Largest:6.8 Mw United States
Fatalities:181+
Deadliest:6.4 Greece
181+ deaths
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[30] 6.0 35.0 Aftershock.
[31] 6.7 15.0 Aftershock.
[32] 6.4 15.0
[33] 6.2 35.0
[34] 6.7 35.0
[35] [36] 6.3 15.0 The 1933 Kos earthquake killed at least 181 people, destroyed many homes on Kos and damaged buildings on nearby islands. Minor damage to buildings in Turkey.[37] 181+
[38] 6.4 15.0 Aftershock.
[39] 6.8 15.0

May

Month:May
8.0–8.9:0
7.0–7.9:0
6.0–6.9:5
Largest:6.7 Mw Mexico
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[40] 6.5 0.0 Depth unknown.
[41] 6.7 30.0
[42] 6.3 10.0 Territory of Alaska
[43] 6.2 120.0
[44] 6.2 180.0

June

Month:June
8.0–8.9:0
7.0–7.9:2
6.0–6.9:12
Deadliest:7.6 Mw
788 deaths
Fatalities:788
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[45] 6.2 35.0
[46] 6.2 35.0
[47] , off the east coast 6.0 120.0
[48] 6.2 35.0
[49] 6.2 35.0
[50] Iceland, southwest of 6.0 35.0
[51] 6.5 80.0
[52] 6.2 35.0 Foreshock.
[53] 6.3 0.0 Depth unknown.
[54] 7.2 30.0
[55] 6.0 0.0 Aftershock. Depth unknown.
[56] 6.5 80.0
[57] [58] 7.6 20.0 The 1933 Sumatra earthquake killed at least 788 people and caused extensive damage.[59] 788650
[60] 6.1 0.0 Depth unknown.

July

Month:July
8.0–8.9:0
7.0–7.9:0
6.0–6.9:12
Largest:6.9 Mw United States
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[61] 6.4 15.0
[62] 6.6 15.0
[63] 6.4 15.0
[64] 6.2 35.0
[65] 6.0 100.0
[66] 6.2 70.0
[67] 6.0 100.0
[68] 6.9 30.0
[69] Peru, off the southern coast of 6.0 80.0
[70] 6.5 25.0
[71] 6.5 160.0
[72] Peru, off the southern coast of 6.0 80.0

August

Month:August
8.0–8.9:0
7.0–7.9:2
6.0–6.9:6
Largest:7.5 Mw United Kingdom
Deadliest:7.3 Mw China
9,300 deaths
Fatalities:9,300
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[73] 6.5 100.0
[74] 6.2 170.0
[75] China, British Burma, border region 6.4 10.0
[76] 6.3 20.0
[77] [78] 7.3 15.0 The 1933 Diexi earthquake caused major destruction. 9,300 people were killed and scores of homes were destroyed. 9,300
[79] 6.5 720.0
[80] 7.5 35.0
[81] 6.5 650.0

September

Month:September
8.0–8.9:0
7.0–7.9:1
6.0–6.9:11
5.0-5.9:1
Largest:7.1 Mw Fiji
Deadliest:5.0 Mw China
200 deaths
Fatalities:210
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[82] 6.8 425.0
[83] 7.1 600.0
[84] 6.2 150.0
[85] 6.2 590.0
[86] 5.0 0.0 200 people were killed in the moderate event. Landslides destroyed 30 homes. Depth unknown. 200
[87] 6.5 100.0
[88] 6.2 50.0
[89] 6.2 35.0
[90] 6.4 55.0
[91] 6.0 35.0
[92] 6.7 10.0
[93] [94] 5.6 15.0 10 people died and some damage was reported. 10
[95] 6.0 35.0
[96] 6.2 35.0

October

Month:October
8.0–8.9:0
7.0–7.9:1
6.0–6.9:10
Largest:7.0 Mw Argentina
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[97] 6.2 120.0
[98] Ecuador, off the coast of 6.7 15.0
[99] 6.2 35.0 Aftershock.
[100] 6.0 35.0 Aftershock.
[101] 6.0 35.0
[102] 6.0 35.0
[103] 6.2 100.0
[104] 6.5 130.0
[105] 7.0 205.0
[106] 6.0 420.0
[107] 6.0 35.0

November

Month:November
8.0–8.9:0
7.0–7.9:1
6.0–6.9:7
Largest:7.4 Mw Canada
Deadliest:6.2 Mw Iran
4 deaths
Fatalities:4
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[108] 6.0 35.0
[109] 6.5 110.0
[110] 7.4 10.0 1933 Baffin Bay earthquake.
[111] Costa Rica, off the south coast 6.0 35.0
[112] 6.7 35.0
[113] Costa Rica, off the south coast 6.0 35.0
[114] [115] 6.2 10.0 4 people were killed and major damage was caused. 4
[116] Costa Rica, off the south coast 6.0 35.0

December

Month:December
8.0–8.9:0
7.0–7.9:0
6.0–6.9:6
Largest:6.8 Mw Russian SFSR
Fatalities:0
Date! rowspan="2" style="width: 310px"
Country and locationMwDepth (km)MMINotesCasualties
DeadInjured
[117] 6.5 140.0
[118] 6.8 305.0
[119] [120] 6.4 15.0 Minor damage was caused.
[121] 6.6 20.0
[122] 6.3 30.0
[123] 6.2 120.0

Notes and References

  1. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . January 1, 1933.
  2. Web site: M 6.4 – Kenai Peninsula, Alaska. United States Geological Survey. April 16, 2016 . January 4, 1933.
  3. Web site: M 6.6 – off the east coast of Honshu, Japan. United States Geological Survey. April 16, 2016 . January 7, 1933.
  4. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . January 8, 1933.
  5. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . January 9, 1933.
  6. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . January 15, 1933.
  7. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . January 18, 1933.
  8. Web site: M 7.1 – Southwest Indian Ridge. United States Geological Survey. April 16, 2016 . January 21, 1933.
  9. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . January 24, 1933.
  10. Web site: M 6.5 – Samoa Islands region. United States Geological Survey. April 16, 2016 . January 27, 1933.
  11. Web site: M 6.4 – Mongolia-China border region. United States Geological Survey. April 16, 2016 . February 13, 1933.
  12. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . February 19, 1933.
  13. Web site: M 7.2 – Tarapaca, Chile. United States Geological Survey. April 16, 2016 . February 23, 1933.
  14. Web site: M 8.4 – off the east coast of Honshu, Japan. United States Geological Survey. April 16, 2016 . March 2, 1933.
  15. Web site: Significant Earthquake: JAPAN: SANRIKU. National Geophysical Data Center. April 16, 2016 . March 2, 1933.
  16. Web site: Tsunami Event: SANRIKU. National Geophysical Data Center. April 16, 2016 . March 2, 1933.
  17. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 2, 1933.
  18. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 3, 1933.
  19. Web site: M 6.4 – off the east coast of Honshu, Japan. United States Geological Survey. April 16, 2016 . March 3, 1933.
  20. Web site: M 6.3 – off the east coast of Honshu, Japan. United States Geological Survey. April 16, 2016 . March 3, 1933.
  21. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 3, 1933.
  22. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 8, 1933.
  23. Web site: M 6.4 – Long Beach, California Earthquake. United States Geological Survey. April 16, 2016 . March 11, 1933.
  24. Web site: Significant Earthquake: CALIFORNIA: LONG BEACH. National Geophysical Data Center. April 16, 2016 . March 11, 1933.
  25. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 11, 1933.
  26. Web site: M 6.6 – near the east coast of the Kamchatka Peninsula, Russia. United States Geological Survey. April 16, 2016 . March 17, 1933.
  27. Web site: M 6.7 – Philippine Islands region. United States Geological Survey. April 16, 2016 . March 17, 1933.
  28. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 18, 1933.
  29. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . March 23, 1933.
  30. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . April 1, 1933.
  31. Web site: M 6.7 – off the east coast of Honshu, Japan. United States Geological Survey. April 16, 2016 . April 9, 1933.
  32. Web site: M 6.4 – offshore Jalisco, Mexico. United States Geological Survey. April 16, 2016 . April 9, 1933.
  33. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . April 16, 1933.
  34. Web site: M 6.7 – Taiwan. United States Geological Survey. April 16, 2016 . April 19, 1933.
  35. Web site: M 6.3 – Dodecanese Islands, Greece. United States Geological Survey. April 16, 2016 . April 23, 1933.
  36. Web site: Significant Earthquake: GREECE: DODECANESE ISLANDS. National Geophysical Data Center. April 16, 2016 . April 23, 1933.
  37. Triantafyllou . Ioanna . Papadopoulos . Gerassimos A. . Lekkas . Efthimios . Impact on built and natural environment of the strong earthquakes of April 23, 1933, and July 20, 2017, in the southeast Aegean Sea, eastern Mediterranean . Natural Hazards . 2020 . 100 . 2 . 671–695 . 10.1007/s11069-019-03832-9. 2020NatHa.100..671T . 209441124 .
  38. Web site: M 6.4 – off the east coast of Honshu, Japan. United States Geological Survey. April 16, 2016 . April 23, 1933.
  39. Web site: M 6.8 – Southern Alaska. United States Geological Survey. April 16, 2016 . April 27, 1933.
  40. Web site: M 6.5 – Andreanof Islands, Aleutian Islands, Alaska. United States Geological Survey. May 18, 2019 . May 1, 1933.
  41. Web site: M 6.7 – Guerrero, Mexico. United States Geological Survey. April 16, 2016 . May 8, 1933.
  42. Web site: M 6.3 – Greece. United States Geological Survey. April 16, 2016 . May 11, 1933.
  43. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . May 21, 1933.
  44. Web site: On-Line Bulletin. International Seismological Centre. April 16, 2016 . May 21, 1933.
  45. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 2, 1933.
  46. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 3, 1933.
  47. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 4, 1933.
  48. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 6, 1933.
  49. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 7, 1933.
  50. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 10, 1933.
  51. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 11, 1933.
  52. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 13, 1933.
  53. Web site: M 6.3 – Southern Alaska. United States Geological Survey. May 21, 2019 . June 13, 1933.
  54. Web site: M 7.2 – near the east coast of Honshu, Japan. United States Geological Survey. April 17, 2016 . June 18, 1933.
  55. Web site: M 6.0 – Southern Alaska. United States Geological Survey. May 21, 2019 . June 19, 1933.
  56. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . June 21, 1933.
  57. Web site: M 7.6 – southern Sumatra, Indonesia. United States Geological Survey. April 17, 2016 . June 24, 1933.
  58. Web site: Significant Earthquake: INDONESIA: S SUMATERA. National Geophysical Data Center. April 17, 2016 . June 24, 1933.
  59. News: 3 July 1933 . Mounting death roll in Sumatra . 25 June 2024 . The Straits Times.
  60. Web site: M 6.1 – Nevada. United States Geological Survey. May 21, 2019 . June 25, 1933.
  61. Web site: M 6.4 – east of the Kuril Islands. United States Geological Survey. April 17, 2016 . July 9, 1933.
  62. Web site: M 6.6 – east of the Kuril Islands. United States Geological Survey. April 17, 2016 . July 9, 1933.
  63. Web site: M 6.4 – offshore Michoacan, Mexico. United States Geological Survey. April 17, 2016 . July 10, 1933.
  64. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 10, 1933.
  65. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 13, 1933.
  66. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 13, 1933.
  67. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 19, 1933.
  68. Web site: M 6.9 – Fox Islands, Aleutian Islands, Alaska. United States Geological Survey. April 17, 2016 . July 22, 1933.
  69. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 23, 1933.
  70. Web site: M 6.5 – Samoa Islands region. United States Geological Survey. April 17, 2016 . July 24, 1933.
  71. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 30, 1933.
  72. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . July 31, 1933.
  73. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . August 6, 1933.
  74. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . August 9, 1933.
  75. Web site: M 6.4 – Myanmar-China border region. United States Geological Survey. April 17, 2016 . August 11, 1933.
  76. Web site: M 6.3 – Catanduanes, Philippines. United States Geological Survey. April 17, 2016 . August 20, 1933.
  77. Web site: M 7.3 – western Sichuan, China. United States Geological Survey. April 17, 2016 . August 25, 1933.
  78. Web site: Significant Earthquake: CHINA: SICHUAN PROVINCE. National Geophysical Data Center. April 17, 2016 . August 25, 1933.
  79. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . August 25, 1933.
  80. Web site: M 7.5 – South Sandwich Islands region. United States Geological Survey. April 17, 2016 . August 28, 1933.
  81. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . August 29, 1933.
  82. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 2, 1933.
  83. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 6, 1933.
  84. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 7, 1933.
  85. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 9, 1933.
  86. Web site: Significant Earthquake: CHINA: SICHUAN PROVINCE. National Geophysical Data Center. April 17, 2016 . September 20, 1933.
  87. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 20, 1933.
  88. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 21, 1933.
  89. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 21, 1933.
  90. Web site: M 6.4 – Andreanof Islands, Aleutian Islands, Alaska. United States Geological Survey. April 17, 2016 . September 24, 1933.
  91. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 25, 1933.
  92. Web site: M 6.7 – southern Xinjiang, China. United States Geological Survey. April 17, 2016 . September 25, 1933.
  93. Web site: M 5.6 – 4 km W of Palena, Italy. United States Geological Survey. August 7, 2022 . September 26, 1933.
  94. Web site: Significant Earthquake: ITALY: CENTRAL. National Geophysical Data Center. April 17, 2016 . September 26, 1933.
  95. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 27, 1933.
  96. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . September 30, 1933.
  97. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 1, 1933.
  98. Web site: M 6.7 – near the coast of Ecuador. United States Geological Survey. April 17, 2016 . October 2, 1933.
  99. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 3, 1933.
  100. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 3, 1933.
  101. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 3, 1933.
  102. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 5, 1933.
  103. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 12, 1933.
  104. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 17, 1933.
  105. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 25, 1933.
  106. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 27, 1933.
  107. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . October 30, 1933.
  108. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . November 4, 1933.
  109. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . November 14, 1933.
  110. Bent . Allison . The 1933 Ms= 7.3 Baffin Bay earthquake: strike-slip faulting along the northeastern Canadian passive margin . Geophysical Journal International . 3 September 2002 . 150 . 3 . 724–736 . 10.1046/j.1365-246X.2002.01722.x . 2002GeoJI.150..724B . free .
  111. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . November 21, 1933.
  112. Web site: M 6.7 – New Britain region, Papua New Guinea. United States Geological Survey. April 17, 2016 . November 22, 1933.
  113. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . November 23, 1933.
  114. Web site: M 6.2 – central Iran. United States Geological Survey. April 17, 2016 . November 28, 1933.
  115. Web site: Significant Earthquake: IRAN: BAHABAD,ALIABAD,RAHIMABAD,KHAIRABAD. National Geophysical Data Center. April 17, 2016 . November 28, 1933.
  116. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . November 29, 1933.
  117. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . December 1, 1933.
  118. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . December 4, 1933.
  119. Web site: M 6.4 – New Britain region, Papua New Guinea. United States Geological Survey. April 17, 2016 . December 12, 1933.
  120. Web site: Significant Earthquake: PAPUA NEW GUINEA. National Geophysical Data Center. April 17, 2016 . December 12, 1933.
  121. Web site: M 6.6 – offshore Colima, Mexico. United States Geological Survey. April 17, 2016 . December 13, 1933.
  122. Web site: M 6.3 – Michoacan, Mexico. United States Geological Survey. April 17, 2016 . December 14, 1933.
  123. Web site: On-Line Bulletin. International Seismological Centre. April 17, 2016 . December 21, 1933.

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