List of earthquakes in 1968

This is a list of earthquakes in 1968. 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. Maximum intensities are indicated on the Mercalli intensity scale and are sourced from United States Geological Survey (USGS) ShakeMap data. There was a large resurgence in activity in 1968. 22 magnitude 7.0+ earthquakes struck various parts of the planet. The largest of these was a magnitude 8.2 event in Japan in May. Large aftershocks struck the area following the mainshock. New Zealand and Indonesia had some upheaval during the year. The high activity contributed to over 12,000 deaths across the world. The vast majority of this total was caused by a destructive event in Iran in August with nearly 10,500 deaths. Events in the Philippines, Italy and Indonesia also had significant fatalities.

Earthquakes in 1968
Approximate epicenters of the earthquakes in 1968
Strongest magnitude off the east coast of Honshu, Japan (Magnitude 8.2) May 16
Deadliest South Khorasan Province, Iran (Magnitude 7.1) August 31 10,488 deaths
Total fatalities12,081
Number by magnitude
9.0+0
8.0−8.91
7.0−7.921
6.0−6.967
5.0−5.92
← 1967
1969 →

Overall

By death toll
Rank Death toll Magnitude Location MMI Depth (km) Date
1 10,488 7.1 South Khorasan Province, Iran IX (Violent) 10.0 August 31
2 700 6.2 Razavi Khorasan Province, Iran VIII (Severe) 15.0 September 1
3 270 7.6 Luzon, Philippines IX (Violent) 25.0 August 1
4 216 6.4 Sicily, Italy X (Extreme) 10.0 January 15
5 200 7.2 Minahassa Peninsula, Indonesia IX (Violent) 20.0 August 14
6 52 8.2 off the east coast of Honshu, Japan VIII (Severe) 29.9 May 16
7 38 5.3 West Azerbaijan Province, Iran VII (Very strong) 34.0 April 29
8 24 6.3 offshore Bartin Province, Turkey VII (Very strong) 20.0 September 3
9 20 7.2 Aegean Sea, Greece VII (Very strong) 15.0 February 19
9 20 6.0 Chiapas, Mexico IV (Light) 124.8 September 25
10 18 7.3 Oaxaca, Mexico VIII (Severe) 25.0 August 2
11 15 6.8 Loreto Region, Peru VII (Very strong) 15.0 June 19
  • Note: At least 10 casualties

By magnitude
Rank Magnitude Death toll Location MMI Depth (km) Date
1 8.2 52 off the east coast of Honshu, Japan VIII (Severe) 29.9 May 16
2 7.9 0 off the northeast coast of Honshu, Japan VII (Very strong) 25.0 May 16
3 7.6 270 Luzon, Philippines IX (Violent) 25.0 August 1
3 7.6 0 Molucca Sea, Indonesia IX (Violent) 23.0 August 10
4 7.5 1 off the east coast of Kyushu, Japan VIII (Severe) 34.2 April 1
4 7.5 0 Papua (province), Indonesia VIII (Severe) 45.0 May 28
5 7.4 0 Kuril Islands, Russia VII (Very strong) 36.9 January 29
6 7.3 0 southeast of New Ireland (island), Papua New Guinea VI (Strong) 30.0 February 12
6 7.3 0 Kermadec Islands, New Zealand ( ) 45.0 July 25
6 7.3 18 Oaxaca, Mexico VIII (Severe) 25.0 August 2
6 7.3 0 Solomon Islands ( ) 543.1 August 18
6 7.3 0 Bonin Islands, Japan ( ) 500.0 October 7
7 7.2 20 Aegean Sea, Greece VII (Very strong) 15.0 February 19
7 7.2 3 South Island, New Zealand IX (Violent) 20.0 May 24
7 7.2 200 Minahassa Peninsula, Indonesia IX (Violent) 20.0 August 14
8 7.1 0 off the east coast of Taiwan VII (Very strong) 25.0 February 26
8 7.1 10,488 South Khorasan Province, Iran IX (Violent) 10.0 August 31
8 7.1 0 Kermadec Islands, New Zealand ( ) 50.0 September 26
9 7.0 0 Kermadec Islands, New Zealand ( ) 55.0 May 20
9 7.0 0 Kuril Islands, Russia ( ) 28.3 May 20
9 7.0 0 off the east coast of Honshu, Japan VI (Strong) 32.1 June 12
9 7.0 0 off the north coast of mainland Papua New Guinea VIII (Severe) 15.0 October 23
  • Note: At least 7.0 magnitude

Notable events

January
January
Strongest magnitude7.4 Mw , Russia
Deadliest6.4 Mw , Italy
216 deaths
Total fatalities224
Number by magnitude
8.0−8.90
7.0−7.91
6.0−6.96
5.0−5.91
  • A magnitude 4.6 earthquake struck the southern outskirts of Managua, Nicaragua on January 4 at a depth of 5.0 km. Although a modest magnitude, there was property damage in the region of $2 million (1968 rate) reported.[1]
  • A magnitude 6.4 earthquake struck Atacama Region, Chile on January 6 at a depth of 30.0 km.[2]
  • A magnitude 6.1 earthquake struck off the east coast of Taiwan on January 13 at a depth of 35.0 km.[3]
  • A magnitude 6.4 earthquake struck Sicily, Italy on January 15 at a depth of 10.0 km.[4] 216 people were killed and 563 were injured. Extensive destruction was reported. Property damage costs were $320 million (1968 rate).[5]
  • A magnitude 6.7 earthquake struck the Solomon Islands on January 19 at a depth of 27.5 km.[6]
  • A magnitude 5.1 aftershock struck Sicily, Italy on January 25 at a depth of 33.0 km. 8 people were killed and a further 55 were injured. Some damage was reported.[7]
  • A magnitude 6.8 earthquake struck Flores, Indonesia on January 26 at a depth of 30.6 km. The shock had a maximum intensity of V (Moderate).[8]
  • A magnitude 7.4 earthquake struck the Kuril Islands, Russia on January 29 at a depth of 36.9 km. The shock had a maximum intensity of VII (Very strong).[9]
  • A magnitude 6.1 aftershock struck the Kuril Islands, Russia on January 29 at a depth of 33.0 km.[10]

February
February
Strongest magnitude7.3 Mw , Papua New Guinea
Deadliest7.2 Mw , Greece
20 deaths
Total fatalities24
Number by magnitude
8.0−8.90
7.0−7.93
6.0−6.92
5.0−5.90
  • A magnitude 6.6 aftershock struck the Kuril Islands, Russia on February 4 at a depth of 23.5 km.[11]
  • A magnitude 7.3 earthquake struck southeast of New Ireland (island), Papua New Guinea on February 12 at a depth of 30.0 km. The shock had a maximum intensity of VI (Strong).[12] Some damage was reported.[13]
  • A magnitude 7.2 earthquake struck the Aegean Sea, Greece on February 19 at a depth of 15.0 km. The shock had a maximum intensity of VII (Very strong).[14] 20 people were killed and 18 were injured. 500 homes collapsed and 1,951 were damaged. Property damage costs were $600,000 (1968 rate).[15]
  • A magnitude 6.2 earthquake struck Miyazaki Prefecture, Kyushu, Japan on February 21 at a depth of 10.0 km.[16] 3 people were killed and some damage was reported.[17]
  • A magnitude 4.9 earthquake struck Bordj Bou Arreridj Province, Algeria on February 25 at an unknown depth. 1 person was killed and 100 homes collapsed.[18]
  • A magnitude 7.1 earthquake struck off the east coast of Taiwan on February 26 at a depth of 25.0 km. The shock had a maximum intensity of VII (Very strong).[19]

March
March
Strongest magnitude6.4 Mw , Tonga
Deadliest4.6 Mw , Kenya
1 death
Total fatalities1
Number by magnitude
8.0−8.90
7.0−7.90
6.0−6.94
5.0−5.90

April
April
Strongest magnitude7.5 Mw , Japan
Deadliest5.3 Mw , Iran
38 deaths
Total fatalities39
Number by magnitude
8.0−8.90
7.0−7.91
6.0−6.94
5.0−5.91
  • A magnitude 7.5 earthquake struck off the east coast of Kyushu, Japan on April 1 at a depth of 34.2 km. The shock had a maximum intensity of VIII (Severe).[25] 1 person died and 22 were injured. Some homes were destroyed.[26]
  • A magnitude 6.8 aftershock struck off the east coast of Kyushu, Japan on April 1 at a depth of 30.0 km. The shock had a maximum intensity of V (Moderate).[27]
  • A magnitude 6.6 earthquake struck southern California on April 9 at a depth of 10.0 km. The shock had a maximum intensity of IX (Violent).[28] Some damage was reported across the area.[29]
  • A magnitude 6.2 earthquake struck Samoa on April 26 at a depth of 30.0 km.[30]
  • A magnitude 6.1 earthquake struck Michoacan, Mexico on April 26 at a depth of 30.0 km.[31]
  • A magnitude 5.3 earthquake West Azerbaijan Province, Iran on April 29 at a depth of 34.0 km. The shock had a maximum intensity of VIII (Severe). 38 people died and 100 were injured. 1,000 homes were destroyed. Property damage costs were $1 million (1968 rate).[32]

May
May
Strongest magnitude8.2 Mw , Japan
Deadliest8.2 Mw , Japan
52 deaths
Total fatalities55
Number by magnitude
8.0−8.91
7.0−7.95
6.0−6.96
5.0−5.90
  • A magnitude 6.7 earthquake struck the Ryukyu Islands, Japan on May 14 at a depth of 160.1 km.[33]
  • A magnitude 8.2 earthquake struck off the east coast of Honshu, Japan on May 16 at a depth of 29.9 km. The shock had a maximum intensity of VIII (Severe).[34] 52 people were killed and 330 were injured. A tsunami washed ashore and combined with the shaking 1,218 homes were destroyed. Total property damage was $131 million (1968 rate).[35][36]
  • Many aftershocks followed the event. The list will be limited to those measuring above 6.5 in magnitude.
  • A magnitude 7.9 aftershock struck off the northeast coast of Honshu, Japan on May 16 at a depth of 25.0 km. The shock had a maximum intensity of VII (Very strong).[37]
  • A magnitude 6.5 aftershock struck off the east coast of Honshu, Japan on May 16 at a depth of 25.0 km.[38]
  • A magnitude 6.5 aftershock struck off the east coast of Honshu, Japan on May 16 at a depth of 43.0 km.[39]
  • A magnitude 6.3 earthquake struck off the east coast of Honshu, Japan on May 19 at a depth of 20.0 km. This was south of the aftershock sequence from the May 16th event.[40]
  • A magnitude 7.0 earthquake struck the Kermadec Islands, New Zealand on May 20 at a depth of 55.0 km.[41]
  • A magnitude 6.9 earthquake struck the Kermadec Islands, New Zealand on May 20 at a depth of 50.0 km. This and the previous event can be considered a doublet earthquake.[42]
  • A magnitude 7.0 earthquake struck the Kuril Islands, Russia on May 20 at a depth of 28.3 km.[43]
  • A magnitude 7.2 earthquake struck South Island, New Zealand on May 24 (May 23 at USGS) at a depth of 20.0 km. The shock had a maximum intensity of IX (Violent).[44] 3 people were killed and property damage was reported at costs of $3 million (1968 rate).[45]
  • A magnitude 6.6 aftershock struck off the east coast of Honshu, Japan on May 24 at a depth of 27.6 km.[46]
  • A magnitude 7.5 earthquake struck Papua (province), Indonesia on May 28 at a depth of 45.0 km. The shock had a maximum intensity of VIII (Severe).[47]

June
June
Strongest magnitude7.0 Mw , Japan
Deadliest6.8 Mw , Peru
15 deaths
Total fatalities15
Number by magnitude
8.0−8.90
7.0−7.91
6.0−6.93
5.0−5.90
  • A magnitude 6.7 earthquake struck Central Sulawesi, Indonesia on June 7 at a depth of 35.0 km. The shock had a maximum intensity of VII (Very strong).[48]
  • A magnitude 6.2 aftershock struck South Sulawesi, Indonesia on June 7 at a depth of 38.0 km. The shock had a maximum intensity of VI (Strong).[49]
  • A magnitude 7.0 aftershock struck off the east coast of Honshu, Japan on June 12 at a depth of 32.1 km. The shock had a maximum intensity of VI (Strong).[50]
  • A magnitude 6.8 earthquake struck Loreto Region, Peru on June 19 at a depth of 15.0 km. The shock had a maximum intensity of VII (Very strong).[51] 15 people died and property damage was $100,000 (1968 rate).[52]

July
July
Strongest magnitude7.3 Mw , New Zealand
Total fatalities0
Number by magnitude
8.0−8.90
7.0−7.91
6.0−6.96
5.0−5.90
  • A magnitude 6.1 earthquake struck Saitama Prefecture, Honshu, Japan on July 1 at a depth of 60.6 km. The shock had a maximum intensity of V (Moderate).[53]
  • A magnitude 6.4 earthquake struck Guerrero, Mexico on July 2 at a depth of 57.9 km.[54]
  • A magnitude 6.0 earthquake struck Papua (province), Indonesia on July 2 at a depth of 45.0 km.[55]
  • A magnitude 6.3 earthquake struck off the east coast of Honshu, Japan on July 5 at a depth of 47.0 km.[56]
  • A magnitude 7.3 earthquake struck the Kermadec Islands, New Zealand on July 25 at a depth of 45.0 km.[57] Some damage was reported.[58]
  • A magnitude 6.2 earthquake struck off the north coast of West Papua (province), Indonesia on July 29 at a depth of 20.0 km.[59]
  • A magnitude 6.5 earthquake struck off the north coast of Peru on July 30 at a depth of 31.8 km. The shock had a maximum intensity of VI (Strong).[60]

August
August
Strongest magnitude7.6 Mw 2 events
Deadliest7.1 Mw , Iran
10,488 deaths
Total fatalities10,976
Number by magnitude
8.0−8.90
7.0−7.96
6.0−6.98
5.0−5.90
  • A magnitude 7.6 earthquake struck Luzon, Philippines on August 1 at a depth of 25.0 km. The shock had a maximum intensity of IX (Violent).[61] 270 people were killed and 261 were injured. Some homes collapsed and many were damaged. Costs were around $8 million (1968 rate).[62]
  • A magnitude 7.3 earthquake struck Oaxaca, Mexico on August 2 at a depth of 25.0 km. The shock had a maximum intensity of VIII (Severe).[63] 18 people were killed. Damage costs were around $2.4 million (1968 rate).[64]
  • A magnitude 6.7 earthquake struck the Ryukyu Islands, Japan on August 3 at a depth of 15.0 km. The shock had a maximum intensity of VI (Strong).[65]
  • A magnitude 6.4 aftershock struck Luzon, Philippines on August 3 at a depth of 25.0 km. The shock had a maximum intensity of V (Moderate).[66]
  • A magnitude 6.1 earthquake struck off the east coast of Mindanao, Philippines on August 4 at a depth of 100.0 km.[67]
  • A magnitude 6.8 earthquake struck off the west coast of Shikoku, Japan on August 5 at a depth of 45.7 km. The shock had a maximum intensity of VI (Strong).[68]
  • A magnitude 7.6 earthquake struck the Molucca Sea, Indonesia on August 10 at a depth of 23.0 km. The shock had a maximum intensity of IX (Violent).[69] Some damage was reported.[70]
  • A magnitude 6.5 aftershock struck the Molucca Sea, Indonesia on August 10 at a depth of 25.0 km.[71]
  • A magnitude 6.0 earthquake struck offshore Michoacan, Mexico on August 14 at a depth of 20.0 km.[72]
  • A magnitude 7.2 earthquake struck the Minahassa Peninsula, Indonesia on August 14 at a depth of 20.0 km. The shock had a maximum intensity of IX (Violent).[73] A tsunami was triggered. 200 people were killed and another 58 were injured. 800 homes were destroyed.[74]
  • A magnitude 7.3 earthquake struck the Solomon Islands on August 18 at a depth of 543.1 km.[75]
  • A magnitude 6.5 earthquake struck the Kermadec Islands on August 21 at a depth of 15.0 km.[76]
  • A magnitude 6.3 earthquake struck Tarija Department, Bolivia on August 23 at a depth of 533.6 km.[77]
  • A magnitude 6.4 earthquake struck off the east coast of Luzon, Philippines on August 28 at a depth of 20.0 km. The shock had a maximum intensity of V (Moderate).[78]
  • A magnitude 7.1 earthquake struck South Khorasan Province, Iran on August 31 at a depth of 10.0 km. The shock had a maximum intensity of IX (Violent).[79] Catastrophic destruction was caused. The death toll was 10,488 and over 17,000 were injured. 12,000 homes were destroyed and property damage costs were $35 million (1968 rate).[80]

September
September
Strongest magnitude7.1 Mw , New Zealand
Deadliest6.2 Mw , Iran
700 deaths
Total fatalities747
Number by magnitude
8.0−8.90
7.0−7.91
6.0−6.913
5.0−5.90
  • A magnitude 6.2 aftershock struck Razavi Khorasan Province, Iran on September 1 at a depth of 15.0 km. The shock had a maximum intensity of VIII (Severe).[81] Another 700 people lost their lives and 1,500 homes were destroyed.[82]
  • A magnitude 6.3 earthquake struck offshore Bartin Province, Turkey on September 3 at a depth of 20.0 km. The shock had a maximum intensity of VII (Very strong).[83] 24 people were killed and 200 were injured. 2,000 homes were damaged or destroyed.[84]
  • A magnitude 6.3 earthquake struck East Sepik Province, Papua New Guinea on September 8 at a depth of 30.0 km. The shock had a maximum intensity of VI (Strong).[85]
  • A magnitude 6.1 earthquake struck Ucayali Region, Peru on September 9 at a depth of 142.3 km.[86]
  • A magnitude 6.2 earthquake struck Fars Province, Iran on September 14 at a depth of 25.0 km. The shock had a maximum intensity of VII (Very strong).[87]
  • A magnitude 6.8 earthquake struck off the south coast of New Britain, Papua New Guinea on September 16 at a depth of 35.0 km. The shock had a maximum intensity of VII (Very strong).[88]
  • A magnitude 6.1 aftershock struck off the south coast of New Britain, Papua New Guinea on September 16 at a depth of 65.0 km.[89]
  • A magnitude 6.5 earthquake struck Sucre, Venezuela on September 20 at a depth of 103.4 km. The shock had a maximum intensity of V (Moderate).[90] 3 people were killed and some damage was caused.[91]
  • A magnitude 6.7 earthquake struck off the south coast of Hokkaido, Japan on September 21 at a depth of 58.3 km. The shock had a maximum intensity of V (Moderate).[92]
  • A magnitude 6.2 earthquake struck off the south coast of the South Island, New Zealand on September 25 at a depth of 15.0 km.[93]
  • A magnitude 6.0 earthquake struck Chiapas, Mexico on September 25 at a depth of 124.8 km. The shock had a maximum intensity of IV (Light).[94] 20 people were killed and some damage was caused.[95]
  • A magnitude 7.1 earthquake struck the Kermadec Islands, New Zealand on September 26 at a depth of 50.0 km.[96]
  • A magnitude 6.4 earthquake struck East Sepik Province, Papua New Guinea on September 27 at a depth of 15.0 km. The shock had a maximum intensity of VIII (Severe).[97]
  • A magnitude 6.1 earthquake struck Lima Region, Peru on September 28 at a depth of 65.0 km.[98]

October
October
Strongest magnitude7.3 Mw , Japan
Total fatalities0
Number by magnitude
8.0−8.90
7.0−7.92
6.0−6.96
5.0−5.90
  • A magnitude 7.3 earthquake struck the Bonin Islands, Japan on October 7 at a depth of 500.0 km.[99]
  • A magnitude 6.5 earthquake struck off the south coast of Hokkaido, Japan on October 7 at a depth of 35.0 km.[100]
  • A magnitude 6.1 earthquake struck off the south coast of New Britain, Papua New Guinea on October 10 at a depth of 48.9 km.[101]
  • A magnitude 6.5 earthquake struck Western Australia on October 14 at a depth of 15.0 km. The shock had a maximum intensity of IX (Violent).[102] Some property damage (costs of $2.2 million) was reported.[103]
  • A magnitude 6.2 earthquake struck off the east coast of Taiwan on October 20 at a depth of 22.5 km.[104]
  • A magnitude 7.0 earthquake struck off the north coast of mainland Papua New Guinea on October 23 at a depth of 15.0 km. The shock had a maximum intensity of VIII (Severe).[105] Some damage was reported.[106]
  • A magnitude 6.3 earthquake struck southeast of Mindanao, Philippines on October 24 at a depth of 45.0 km.[107]
  • A magnitude 6.7 earthquake struck northern Alaska on October 29 at a depth of 10.0 km.[108]

November
November
Strongest magnitude6.5 Mw , Vanuatu
Total fatalities0
Number by magnitude
8.0−8.90
7.0−7.90
6.0−6.93
5.0−5.90
  • A magnitude 6.5 earthquake struck Vanuatu on November 4 at a depth of 597.0 km.[109]
  • A magnitude 6.1 earthquake struck Zulia, Venezuela on November 17 at a depth of 175.7 km.[110]
  • A magnitude 6.1 earthquake struck Luzon, Philippines on November 22 at a depth of 35.0 km. The shock had a maximum intensity of V (Moderate).[111]

December
December
Strongest magnitude6.6 Mw , Papua New Guinea
Total fatalities0
Number by magnitude
8.0−8.90
7.0−7.90
6.0−6.95
5.0−5.90
  • A magnitude 6.1 earthquake struck the Dodecanese Islands, Greece on December 5 at a depth of 20.0 km.[112]
  • A magnitude 6.0 earthquake struck the Southern Peninsula (Iceland) on December 5 at a depth of 10.0 km. The shock had a maximum intensity of VII (Very strong).[113]
  • A magnitude 6.6 earthquake struck the Bismarck Sea, Papua New Guinea on December 7 at a depth of 15.0 km.[114]
  • A magnitude 6.3 earthquake struck southern Alaska on December 17 at a depth of 109.6 km.[115]
  • A magnitude 6.0 earthquake struck eastern Kamchatka, Russia on December 19 at a depth of 44.1 km.[116]
gollark: Arguably.
gollark: Viriiiios aren't single-*celled*, at least.
gollark: Between "can feel pain/pleasure" and "cannot feel pain/pleasure".
gollark: Where's the dividing line then?
gollark: Arguably they aren't actually alive.

References
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  4. "M 6.4 - Sicily, Italy". United States Geological Survey. January 15, 1968. Retrieved May 12, 2017.
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  50. "M 7.0 - off the east coast of Honshu, Japan". United States Geological Survey. June 12, 1968. Retrieved May 20, 2017.
  51. "M 6.8 - northern Peru". United States Geological Survey. June 19, 1968. Retrieved May 20, 2017.
  52. "Significant Earthquake: PERU: SAN MARTIN,MOYOBAMBA,YANTALO,RIOJA,LAMAS". National Geophysical Data Center. June 19, 1968. Retrieved May 20, 2017.
  53. "M 6.1 - near the south coast of Honshu, Japan". United States Geological Survey. July 1, 1968. Retrieved May 20, 2017.
  54. "M 6.4 - Guerrero, Mexico". United States Geological Survey. July 2, 1968. Retrieved May 20, 2017.
  55. "M 6.0 - Papua, Indonesia". United States Geological Survey. July 2, 1968. Retrieved May 21, 2017.
  56. "M 6.3 - near the east coast of Honshu, Japan". United States Geological Survey. July 5, 1968. Retrieved May 21, 2017.
  57. "M 7.3 - Kermadec Islands, New Zealand". United States Geological Survey. July 25, 1968. Retrieved May 21, 2017.
  58. "Significant Earthquake: KERMADEC ISLANDS: S OF, RAOUL". National Geophysical Data Center. July 25, 1968. Retrieved May 21, 2017.
  59. "M 6.2 - near the north coast of Papua, Indonesia". United States Geological Survey. July 29, 1968. Retrieved May 21, 2017.
  60. "M 6.5 - near the coast of northern Peru". United States Geological Survey. July 30, 1968. Retrieved May 21, 2017.
  61. "M 7.6 - Luzon, Philippines". United States Geological Survey. August 1, 1968. Retrieved May 21, 2017.
  62. "Significant Earthquake: PHILIPPINES: LUZON: MANILA". National Geophysical Data Center. August 1, 1968. Retrieved May 21, 2017.
  63. "M 7.3 - Oaxaca, Mexico". United States Geological Survey. August 2, 1968. Retrieved May 21, 2017.
  64. "Significant Earthquake: MEXICO: OAXACA, GUERRERO". National Geophysical Data Center. August 2, 1968. Retrieved May 21, 2017.
  65. "M 6.7 - Ryukyu Islands, Japan". United States Geological Survey. August 3, 1968. Retrieved May 21, 2017.
  66. "M 6.4 - Luzon, Philippines". United States Geological Survey. August 3, 1968. Retrieved May 21, 2017.
  67. "M 6.1 - Mindanao, Philippines". United States Geological Survey. August 4, 1968. Retrieved May 21, 2017.
  68. "M 6.8 - Shikoku, Japan". United States Geological Survey. August 5, 1968. Retrieved May 21, 2017.
  69. "M 7.6 - Molucca Sea". United States Geological Survey. August 10, 1968. Retrieved May 22, 2017.
  70. "Significant Earthquake: INDONESIA: MOLUCCA ISLANDS: MANADO, CELEBES". National Geophysical Data Center. August 10, 1968. Retrieved May 22, 2017.
  71. "M 6.5 - Molucca Sea". United States Geological Survey. August 10, 1968. Retrieved May 22, 2017.
  72. "M 6.0 - offshore Michoacan, Mexico". United States Geological Survey. August 14, 1968. Retrieved May 22, 2017.
  73. "M 7.2 - Minahasa, Sulawesi, Indonesia". United States Geological Survey. August 14, 1968. Retrieved May 22, 2017.
  74. "Tsunami Event: BANDA SEA". National Geophysical Data Center. August 14, 1968. Retrieved May 22, 2017.
  75. "M 7.3 - Solomon Islands". United States Geological Survey. August 18, 1968. Retrieved May 22, 2017.
  76. "M 6.5 - Kermadec Islands, New Zealand". United States Geological Survey. August 21, 1968. Retrieved May 27, 2017.
  77. "M 6.3 - Tarija, Bolivia". United States Geological Survey. August 23, 1968. Retrieved May 27, 2017.
  78. "M 6.4 - Philippine Islands region". United States Geological Survey. August 28, 1968. Retrieved May 27, 2017.
  79. "M 6.4 - Philippine Islands region". United States Geological Survey. August 28, 1968. Retrieved May 27, 2017.
  80. "Significant Earthquake: IRAN: DASHT-E-BAYAZ". National Geophysical Data Center. August 31, 1968. Retrieved May 27, 2017.
  81. "M 6.2 - northeastern Iran". United States Geological Survey. September 1, 1968. Retrieved May 27, 2017.
  82. "Significant Earthquake: IRAN: FERDOW". National Geophysical Data Center. September 1, 1968. Retrieved May 27, 2017.
  83. "M 6.3 - central Turkey". United States Geological Survey. September 3, 1968. Retrieved May 28, 2017.
  84. "Significant Earthquake: TURKEY: BARTIN, AMASRA, CAKRAZ". National Geophysical Data Center. September 3, 1968. Retrieved May 28, 2017.
  85. "M 6.3 - near the north coast of New Guinea, Papua New Guinea". United States Geological Survey. September 8, 1968. Retrieved May 28, 2017.
  86. "M 6.1 - central Peru". United States Geological Survey. September 9, 1968. Retrieved May 28, 2017.
  87. "M 6.2 - southern Iran". United States Geological Survey. September 14, 1968. Retrieved May 28, 2017.
  88. "M 6.8 - New Britain region, Papua New Guinea". United States Geological Survey. September 16, 1968. Retrieved May 29, 2017.
  89. "M 6.1 - New Britain region, Papua New Guinea". United States Geological Survey. September 16, 1968. Retrieved May 29, 2017.
  90. "M 6.5 - Sucre, Venezuela". United States Geological Survey. September 20, 1968. Retrieved May 29, 2017.
  91. "Significant Earthquake: VENEZUELA: CARUPANO". National Geophysical Data Center. September 20, 1968. Retrieved May 29, 2017.
  92. "M 6.7 - Hokkaido, Japan region". United States Geological Survey. September 21, 1968. Retrieved May 29, 2017.
  93. "M 6.2 - off the west coast of the South Island of New Zealand". United States Geological Survey. September 25, 1968. Retrieved May 29, 2017.
  94. "M 6.0 - Chiapas, Mexico". United States Geological Survey. September 25, 1968. Retrieved May 29, 2017.
  95. "Significant Earthquake: MEXICO-GUATEMALA: S CHIAPAS". National Geophysical Data Center. September 25, 1968. Retrieved May 29, 2017.
  96. "M 7.1 - Kermadec Islands, New Zealand". United States Geological Survey. September 26, 1968. Retrieved May 29, 2017.
  97. "M 6.4 - near the north coast of New Guinea, Papua New Guinea". United States Geological Survey. September 27, 1968. Retrieved May 31, 2017.
  98. "M 6.1 - near the coast of central Peru". United States Geological Survey. September 28, 1968. Retrieved May 31, 2017.
  99. "M 7.3 - Bonin Islands, Japan region". United States Geological Survey. October 7, 1968. Retrieved May 31, 2017.
  100. "M 6.5 - Hokkaido, Japan region". United States Geological Survey. October 7, 1968. Retrieved May 31, 2017.
  101. "M 6.1 - New Britain region, Papua New Guinea". United States Geological Survey. October 10, 1968. Retrieved May 31, 2017.
  102. "M 6.5 - Western Australia". United States Geological Survey. October 14, 1968. Retrieved May 31, 2017.
  103. "Significant Earthquake: AUSTRALIA: MECKERING, NORTHAM, CUNDERDIN, YORK". National Geophysical Data Center. October 10, 1968. Retrieved May 31, 2017.
  104. "M 6.2 - Taiwan region". United States Geological Survey. October 20, 1968. Retrieved May 31, 2017.
  105. "M 7.0 - near the north coast of New Guinea, Papua New Guinea". United States Geological Survey. October 23, 1968. Retrieved June 3, 2017.
  106. "Significant Earthquake: PAPUA NEW GUINEA: N COAST, WEWAK, DAGUA". National Geophysical Data Center. October 23, 1968. Retrieved June 3, 2017.
  107. "M 6.3 - Philippine Islands region". United States Geological Survey. October 24, 1968. Retrieved June 3, 2017.
  108. "M 6.7 - northern Alaska". United States Geological Survey. October 29, 1968. Retrieved June 3, 2017.
  109. "M 6.5 - Vanuatu region". United States Geological Survey. November 4, 1968. Retrieved June 3, 2017.
  110. "M 6.1 - Zulia, Venezuela". United States Geological Survey. November 17, 1968. Retrieved June 3, 2017.
  111. "M 6.1 - Luzon, Philippines". United States Geological Survey. November 22, 1968. Retrieved June 3, 2017.
  112. "M 6.1 - Dodecanese Islands, Greece". United States Geological Survey. December 5, 1968. Retrieved June 3, 2017.
  113. "M 6.0 - Iceland region". United States Geological Survey. December 5, 1968. Retrieved June 3, 2017.
  114. "M 6.6 - Bismarck Sea". United States Geological Survey. December 7, 1968. Retrieved June 3, 2017.
  115. "M 6.3 - Southern Alaska". United States Geological Survey. December 17, 1968. Retrieved June 3, 2017.
  116. "M 6.0 - near the east coast of the Kamchatka Peninsula, Russia". United States Geological Survey. December 19, 1968. Retrieved June 3, 2017.
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