List of earthquakes in 1977

Earthquakes in 1977

class=notpageimage| Approximate epicenters of the earthquakes in 1977 4.0–5.9 magnitude 6.0–6.9 magnitude 7.0–7.9 magnitude 8.0+ magnitude
Strongest magnitude	Indonesia, south of Sumbawa (Magnitude 8.3) August 19
Deadliest	Romania, Vrancea County (Magnitude 7.5) March 4 1,641 deaths
Total fatalities	3,107
Number by magnitude
9.0+	0
8.0–8.9	1
7.0–7.9	10
6.0–6.9	75
5.0–5.9	1,693
4.0–4.9	2,395
←  1976 1978  →

This is a list of earthquakes in 1977. Only earthquakes of magnitude 6 or above are included, unless they result in damage and/or casualties, or are notable for some other reason. Events in remote areas will not be listed but included in statistics and maps. Countries are entered on the lists in order of their status in this particular year. 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. Not a particularly busy year as far as the number of magnitude 7.0+ events with 11 being recorded. The largest event struck Indonesia in August and measured magnitude 8.3. The Solomon Islands were affected by a series of magnitude 7.5 events in April. Several events caused significant numbers of fatalities especially in Iran which had 3 earthquakes throughout the year with a combined death toll of around 1,120 people. The deadliest earthquake occurred in Romania in March and was the worst in the country's history. 1,641 people were killed in this event.

By death toll

Rank	Death toll	Magnitude	Location	MMI	Depth (km)	Date
1	1,641	7.5	Romania, Vrancea County	VIII (Severe)	94.0	March 4
2	584	5.8	Iran, Kerman Province	VIII (Severe)	31.0	December 19
3	366	5.9	Iran, Chaharmahal and Bakhtiari Province	IX (Violent)	41.0	April 6
4	189	8.3	Indonesia, south of Sumbawa	VI (Strong)	25.0	August 19
5	167	6.9	Iran, Hormozgan Province	IX (Violent)	29.0	March 21
6	70	7.4	Argentina, San Juan Province, Argentina	X (Extreme)	13.0	November 23
7	34	6.7	British Solomon Islands, Guadalcanal	VII (Very strong)	33.0	April 20
8	30	5.2	Turkey, Elazığ Province	V (Moderate)	21.0	March 25
9	18	7.5	British Solomon Islands, Guadalcanal	VII (Very strong)	33.0	April 21

Listed are earthquakes with at least 10 dead.

By magnitude

Rank	Magnitude	Death toll	Location	MMI	Depth (km)	Date
1	8.3	189	Indonesia, south of Sumbawa	VI (Strong)	25.0	August 19
2	7.6	0	Western Samoa	VI (Strong)	33.0	April 2
= 3	7.5	1,641	Romania, Vrancea County	VIII (Severe)	94.0	March 4
= 3	7.5	0	British Solomon Islands, Guadalcanal	VII (Very strong)	19.0	April 20
= 3	7.5	0	British Solomon Islands, Guadalcanal	VII (Very strong)	33.0	April 20
= 3	7.5	18	British Solomon Islands, Guadalcanal	VII (Very strong)	33.0	April 21
4	7.4	70	Argentina, San Juan Province, Argentina	X (Extreme)	13.0	November 23
= 5	7.2	0	British Solomon Islands	VI (Strong)	33.0	July 29
= 5	7.2	0	Tonga, south of	III (Weak)	33.0	October 10
6	7.1	0	Falkland Islands Dependencies, east of South Georgia and the South Sandwich Islands	( )	33.0	August 26
7	7.0	1	Philippines, Luzon	VIII (Severe)	37.0	March 18

Listed are earthquakes with at least 7.0 magnitude.

By month

January

January

Strongest magnitude	6.6 Mw   Papua New Guinea
Total fatalities	0
Number by magnitude
8.0–8.9	0
7.0–7.9	0
6.0–6.9	7
5.0–5.9	131
4.0–4.9	184

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
1 [1] [2]	China, Qinghai Province	6.3	27.0	VII
2 [3] [4]	Indonesia, south of Sumbawa	6.3	19.0	V
6 [5] [6]	Papua New Guinea, off the north coast of East Sepik Province	6.6	33.0	VII
17 [7] [8]	Chile, Antofagasta Region	6.3	33.0	VI
18 [9] [10]	New Zealand, Cook Strait	6.0	50.0	VI
26 [11] [12] [13]	Indonesia, Bali	5.2	33.0	VI	Some damage was caused.
31 [14] [15] [16]	Soviet Union, Batken Region, Kyrgyzstan	6.1	20.0	VII	Some damage was caused.

February

February

Strongest magnitude	6.7 Mw   United States
Total fatalities	0
Number by magnitude
8.0–8.9	0
7.0–7.9	0
6.0–6.9	7
5.0–5.9	96
4.0–4.9	152

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
4 [17]	Argentina, Salta Province	6.0	549.0
19 [18]	United States, Near Islands, Alaska	6.7	33.0

March

March

Strongest magnitude	7.5 Mw   Romania
Deadliest	7.5 Mw   Romania 1,641 deaths
Total fatalities	1,839
Number by magnitude
8.0–8.9	0
7.0–7.9	2
6.0–6.9	7
5.0–5.9	132
4.0–4.9	229

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
2 [19] [20]	Philippines, Moro Gulf, Mindanao	6.1	52.0	VI
4 [21] [22] [23]	Romania, Vrancea County	7.5	94.0	VIII	Deadliest event of 1977. The 1977 Vrancea earthquake caused major destruction despite being fairly deep. 1,641 people were killed and 10,500 were injured. This was the deadliest earthquake in Romanian history. Bucharest suffered major property damage with costs reaching $2 billion (1977 rate).	1,641	10,500
8 [24] [25] [26]	Indonesia, northern Sumatra	6.0	22.0	VIII	Some damage was caused.
18 [27] [28] [29]	Philippines, Luzon	7.0	37.0	VIII	1 person was killed and another 9 were injured. 14 homes were destroyed and 22 more were damaged. Costs were $100,000 (1977 rate).	1	9
21 [30] [31] [32]	Iran, Hormozgan Province	6.9	29.0	VIII	During the 1977 Khurgu earthquake , 167 people were killed and another 556 were injured. Major damage was reported.	167	556
23 [33] [34]	Fiji	6.3	33.0	VI
23 [35]	Fiji	6.0	2.0		Aftershock of previous event.
25 [36] [37] [38]	Turkey, Elazığ Province	5.2	21.0	V	30 people were killed and major damage was caused.	30
26 [39] [40]	United States, Fox Islands (Alaska)	6.0	38.0	IV

April

April

Strongest magnitude	7.6 Mw   Western Samoa
Deadliest	5.9 Mw   Iran 366 deaths
Total fatalities	418
Number by magnitude
8.0–8.9	0
7.0–7.9	4
6.0–6.9	7
5.0–5.9	156
4.0–4.9	234

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
1 [41] [42]	Iran, Hormozgan Province	6.2	29.0	VII	Aftershock of March 21 event.
2 [43] [44] [45]	Western Samoa	7.6	33.0	VI	Some damage was reported.
6 [46] [47] [48]	Iran, Chaharmahal and Bakhtiari Province	5.9	41.0	IX	The 1977 Naghan earthquake killed at least 366 people and left a further 200 injured. Some damage was caused.	366	200
20 [49] [50] [51]	United Kingdom, Guadalcanal, Solomon Islands	6.7	33.0	VII	Beginning of a series of large and destructive earthquakes in a period of several hours. 12 people died and a further 22 were missing in the first event. Major damage was caused. A mild tsunami was observed.	34
20 [52] [53] [54]	United Kingdom, Guadalcanal, Solomon Islands	7.5	19.0	IX [55]	Some damage was caused.
20 [56] [57] [58]	United Kingdom, Guadalcanal, Solomon Islands	7.5	33.0	VIII	Suspected injuries and damage were reported.		1+
21 [59] [60]	United Kingdom, Guadalcanal, Solomon Islands	6.1	33.0	VI
21 [61] [62] [63]	United Kingdom, Guadalcanal, Solomon Islands	7.5	33.0	VII	Final of the mainshocks in the series. A further 18 people were killed and 1 person was injured. Major damage was caused.	18	1
21 [64] [65]	United Kingdom, Solomon Islands	6.0	33.0	V	Aftershock.
22 [66] [67]	United Kingdom, Solomon Islands	6.0	51.0	V	Aftershock.

May

May

Strongest magnitude	6.0 Mw   United States
Deadliest	5.4 Mw   Iran 3 deaths
Total fatalities	3
Number by magnitude
8.0–8.9	0
7.0–7.9	0
6.0–6.9	1
5.0–5.9	128
4.0–4.9	211

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
26 [68] [69] [70]	Iran, West Azarbaijan Province	5.4	37.0	V	3 people were killed and 9 were injured. Heavy damage was reported.	3	9
30 [71] [72]	United States, Fox Islands (Alaska)	6.0	33.0	IV

June

June

Strongest magnitude	6.8 Mw   Tonga
Deadliest	6.8 Mw   Tonga 1 death
Total fatalities	1
Number by magnitude
8.0–8.9	0
7.0–7.9	0
6.0–6.9	4
5.0–5.9	115
4.0–4.9	224

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
22 [73] [74] [75]	Tonga	6.8	65.0	VII	1 person was killed and 5 were injured in the 1977 Tonga earthquake. $1.2 million (1977 rate) of property damage was caused.	1	5

July

July

Strongest magnitude	7.2 Mw   United Kingdom, Solomon Islands
Total fatalities	0
Number by magnitude
8.0–8.9	0
7.0–7.9	1
6.0–6.9	5
5.0–5.9	116
4.0–4.9	184

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
16 [76] [77]	Yugoslavia, Upper Carniola, Slovenia	4.6	6.0	VI	Some damage was caused.
21 [78] [79]	Philippines, Luzon	6.9	33.0	VII
29 [80] [81]	United Kingdom, Solomon Islands	7.2	33.0	VI

August

August

Strongest magnitude	8.3 Mw   Indonesia
Deadliest	8.3 Mw   Indonesia 189 deaths
Total fatalities	192
Number by magnitude
8.0–8.9	1
7.0–7.9	1
6.0–6.9	11
5.0–5.9	180
4.0–4.9	212

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
19 [82]	Indonesia, south of Sumbawa	6.1	33.0		Foreshock of 1977 Sumba earthquake.
19 [83] [84] [85] [86]	Indonesia, south of Sumbawa	8.3	25.0	VI	Largest event of 1977. The 1977 Sumba earthquake caused some damage. A large tsunami led to 189 deaths and 75 injuries. Damage costs of $1.2 million (1977 rate). Many aftershocks followed.	189	75
26 [87]	United Kingdom, east of South Georgia and the South Sandwich Islands	7.1	33.0
27 [88] [89]	Indonesia, north of Timor	6.8	25.0	VII
29 [90] [91]	Philippines, west of Luzon	6.2	12.0	V
31 [92] [93] [94]	Colombia, Antioquia Department	6.4	33.0	VII	3 people were killed and some damage was caused.	3

September

September

Strongest magnitude	6.6 Mw   United States
Total fatalities	0
Number by magnitude
8.0–8.9	0
7.0–7.9	0
6.0–6.9	9
5.0–5.9	141
4.0–4.9	192

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
4 [95] [96]	New Hebrides, Vanuatu	6.5	33.0	VI
4 [97] [98]	United States, Rat Islands, Alaska	6.4	34.0	II	First of a series of large events in the area.
4 [99] [100]	United States, Rat Islands, Alaska	6.4	31.0	II
4 [101] [102]	United States, Rat Islands, Alaska	6.6	8.0	II
12 [103]	Greece, southwest of Crete	6.0	33.0
13 [104]	Tonga	6.0	33.0

October

October

Strongest magnitude	7.2 Mw   Tonga
Total fatalities	0
Number by magnitude
8.0–8.9	0
7.0–7.9	1
6.0–6.9	4
5.0–5.9	184
4.0–4.9	208

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
10 [105] [106]	Tonga, south of	7.2	33.0	III
22 [107]	Argentina, Santiago del Estero Province	6.1	614.0

November

November

Strongest magnitude	7.4 Mw   Argentina
Deadliest	7.4 Mw   Argentina 70 deaths
Total fatalities	70
Number by magnitude
8.0–8.9	0
7.0–7.9	1
6.0–6.9	7
5.0–5.9	160
4.0–4.9	186

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
3 [108] [109] [110]	Bulgaria, Pazardzhik Province	5.2	6.0	VII	Some damage was caused.
4 [111] [112]	United States, Andreanof Islands, Alaska	6.7	33.0	VI
9 [113] [114] [115]	Iran, Semnan Province	4.9	33.0	IV	Some damage was caused.
18 [116] [117]	China, western Xizang Province	6.5	33.0	VIII
23 [118] [119] [120]	Argentina, San Juan Province, Argentina	7.4	13.0	X	70 people were killed and 300 were injured in the 1977 San Juan earthquake. Extensive property damage was caused with costs of $80 million (1977 rate).	70	300
23 [121] [122]	Argentina, La Rioja Province	6.0	33.0	VI	Aftershock.
24 [123] [124]	Argentina, San Juan Province, Argentina	6.0	33.0	VII	Aftershock.
24 [125] [126]	Argentina, San Juan Province, Argentina	6.3	23.0	VII	Aftershock.

December

December

Strongest magnitude	6.8 Mw   Japan
Deadliest	5.8 Mw   Iran 584 deaths
Total fatalities	584
Number by magnitude
8.0–8.9	0
7.0–7.9	0
6.0–6.9	6
5.0–5.9	154
4.0–4.9	179

Date	Country and location	Mw	Depth (km)	MMI	Notes	Casualties
						Dead	Injured
19 [127] [128] [129]	Iran, Kerman Province	5.8	31.0	VIII	During the 1977 Bob–Tangol earthquake, 584 people were killed and 1,000 were injured. Major damage was caused.	584	1,000
28 [130] [131]	Red Sea	6.6	33.0	VIII

References

1. "M 6.3 – Xinjiang-Qinghai border region, China". United States Geological Survey. January 1, 1977. Retrieved June 6, 2021.
2. "M 6.3 – Xinjiang-Qinghai border region, China". United States Geological Survey. January 1, 1977. Retrieved June 6, 2021.
3. "M 6.3 – south of Sumbawa, Indonesia". United States Geological Survey. January 2, 1977. Retrieved June 6, 2021.
4. "M 6.3 – south of Sumbawa, Indonesia". United States Geological Survey. January 2, 1977. Retrieved June 6, 2021.
5. "M 6.6 – near the north coast of New Guinea, Papua New Guinea". United States Geological Survey. January 6, 1977. Retrieved June 6, 2021.
6. "M 6.6 – near the north coast of New Guinea, Papua New Guinea". United States Geological Survey. January 6, 1977. Retrieved June 6, 2021.
7. "M 6.3 – Antofagasta, Chile". United States Geological Survey. January 17, 1977. Retrieved June 6, 2021.
8. "M 6.3 – Antofagasta, Chile". United States Geological Survey. January 17, 1977. Retrieved June 6, 2021.
9. "M 6.0 – Cook Strait, New Zealand". United States Geological Survey. January 18, 1977. Retrieved June 6, 2021.
10. "M 6.0 – Cook Strait, New Zealand". United States Geological Survey. January 18, 1977. Retrieved June 6, 2021.
11. "M 5.2 – Bali region, Indonesia". United States Geological Survey. January 26, 1977. Retrieved June 6, 2021.
12. "M 5.2 – Bali region, Indonesia". United States Geological Survey. January 26, 1977. Retrieved June 6, 2021.
13. "Significant Earthquake: INDONESIA: BALI: KAYUBIHI,BANJAR ANTUGAN JEHEM". National Geophysical Data Center. January 26, 1977. Retrieved June 6, 2021.
14. "M 6.1 – Kyrgyzstan". United States Geological Survey. January 31, 1977. Retrieved June 6, 2021.
15. "M 6.1 – Kyrgyzstan". United States Geological Survey. January 31, 1977. Retrieved June 6, 2021.
16. "Significant Earthquake: TAJIKISTAN". National Geophysical Data Center. January 31, 1977. Retrieved June 6, 2021.
17. "M 6.0 – Salta, Argentina". United States Geological Survey. February 4, 1977. Retrieved June 6, 2021.
18. "M 6.7 – Near Islands, Aleutian Islands, Alaska". United States Geological Survey. February 19, 1977. Retrieved June 6, 2021.
19. "M 6.1 – Moro Gulf, Mindanao, Philippines". United States Geological Survey. March 2, 1977. Retrieved June 6, 2021.
20. "M 6.1 – Moro Gulf, Mindanao, Philippines". United States Geological Survey. March 2, 1977. Retrieved June 6, 2021.
21. "M 7.5 – Romania". United States Geological Survey. March 4, 1977. Retrieved June 6, 2021.
22. "M 7.5 – Romania". United States Geological Survey. March 4, 1977. Retrieved June 6, 2021.
23. "Significant Earthquake: ROMANIA: BUCHAREST". National Geophysical Data Center. March 4, 1977. Retrieved June 6, 2021.
24. "M 6.0 – northern Sumatra, Indonesia". United States Geological Survey. March 8, 1977. Retrieved June 6, 2021.
25. "M 6.0 – northern Sumatra, Indonesia". United States Geological Survey. March 8, 1977. Retrieved June 6, 2021.
26. "Significant Earthquake: INDONESIA: SUMATERA,SINURAT,TALU". National Geophysical Data Center. March 8, 1977. Retrieved June 6, 2021.
27. "M 7.0 – Luzon, Philippines". United States Geological Survey. March 18, 1977. Retrieved June 6, 2021.
28. "M 7.0 – Luzon, Philippines". United States Geological Survey. March 18, 1977. Retrieved June 6, 2021.
29. "Significant Earthquake: PHILIPPINES: LUZON: MANILA". National Geophysical Data Center. March 18, 1977. Retrieved June 6, 2021.
30. "M 6.9 – southern Iran". United States Geological Survey. March 21, 1977. Retrieved June 6, 2021.
31. "M 6.9 – southern Iran". United States Geological Survey. March 21, 1977. Retrieved June 6, 2021.
32. "Significant Earthquake: IRAN: BANDAR ABBAS". National Geophysical Data Center. March 21, 1977. Retrieved June 6, 2021.
33. "M 6.3 – Fiji region". United States Geological Survey. March 23, 1977. Retrieved June 6, 2021.
34. "M 6.3 – Fiji region". United States Geological Survey. March 23, 1977. Retrieved June 6, 2021.
35. "M 6.3 – Fiji region". United States Geological Survey. March 23, 1977. Retrieved June 6, 2021.
36. "M 5.2 – eastern Turkey". United States Geological Survey. March 25, 1977. Retrieved June 7, 2021.
37. "M 5.2 – eastern Turkey". United States Geological Survey. March 25, 1977. Retrieved June 7, 2021.
38. "Significant Earthquake: TURKEY". National Geophysical Data Center. March 25, 1977. Retrieved June 7, 2021.
39. "M 6.0 – Fox Islands, Aleutian Islands, Alaska". United States Geological Survey. March 26, 1977. Retrieved June 7, 2021.
40. "M 6.0 – Fox Islands, Aleutian Islands, Alaska". United States Geological Survey. March 26, 1977. Retrieved June 7, 2021.
41. "M 6.2 – southern Iran". United States Geological Survey. April 1, 1977. Retrieved June 8, 2021.
42. "M 6.2 – southern Iran". United States Geological Survey. April 1, 1977. Retrieved June 8, 2021.
43. "M 7.6 – Samoa Islands region". United States Geological Survey. April 2, 1977. Retrieved June 8, 2021.
44. "M 7.6 – Samoa Islands region". United States Geological Survey. April 2, 1977. Retrieved June 8, 2021.
45. "Significant Earthquake: SAMOA ISLANDS: APIA". National Geophysical Data Center. April 2, 1977. Retrieved June 8, 2021.
46. "M 5.9 – western Iran". United States Geological Survey. April 6, 1977. Retrieved June 8, 2021.
47. "M 5.9 – western Iran". United States Geological Survey. April 6, 1977. Retrieved June 8, 2021.
48. "Significant Earthquake: IRAN: NAGHAN,ARDAL,JAGHDAN,DASTGERD,KORDAN,SARMUR". National Geophysical Data Center. April 6, 1977. Retrieved June 8, 2021.
49. "M 6.7 – Solomon Islands". United States Geological Survey. April 20, 1977. Retrieved June 8, 2021.
50. "M 6.7 – Solomon Islands". United States Geological Survey. April 20, 1977. Retrieved June 8, 2021.
51. "Significant Earthquake: SOLOMON ISLANDS". National Geophysical Data Center. April 20, 1977. Retrieved June 8, 2021.
52. "M 7.5 – Solomon Islands". United States Geological Survey. April 20, 1977. Retrieved June 8, 2021.
53. "M 7.5 – Solomon Islands". United States Geological Survey. April 20, 1977. Retrieved June 8, 2021.
54. "Significant Earthquake: SOLOMON ISLANDS". National Geophysical Data Center. April 20, 1977. Retrieved June 8, 2021.
55. "PAGER" (PDF). United States Geological Survey. 27 March 2023. Retrieved 3 April 2023.
56. "M 7.5 – Solomon Islands". United States Geological Survey. April 20, 1977. Retrieved June 8, 2021.
57. "M 7.5 – Solomon Islands". United States Geological Survey. April 20, 1977. Retrieved June 8, 2021.
58. "Significant Earthquake: SOLOMON ISLANDS". National Geophysical Data Center. April 20, 1977. Retrieved June 8, 2021.
59. "M 6.1 – Solomon Islands". United States Geological Survey. April 21, 1977. Retrieved June 8, 2021.
60. "M 6.1 – Solomon Islands". United States Geological Survey. April 21, 1977. Retrieved June 8, 2021.
61. "M 7.5 – Solomon Islands". United States Geological Survey. April 21, 1977. Retrieved June 8, 2021.
62. "M 7.5 – Solomon Islands". United States Geological Survey. April 21, 1977. Retrieved June 8, 2021.
63. "Significant Earthquake: SOLOMON ISLANDS". National Geophysical Data Center. April 21, 1977. Retrieved June 8, 2021.
64. "M 6.0 – Solomon Islands". United States Geological Survey. April 21, 1977. Retrieved June 8, 2021.
65. "M 6.0 – Solomon Islands". United States Geological Survey. April 21, 1977. Retrieved June 8, 2021.
66. "M 6.0 – Solomon Islands". United States Geological Survey. April 22, 1977. Retrieved June 8, 2021.
67. "M 6.0 – Solomon Islands". United States Geological Survey. April 22, 1977. Retrieved June 8, 2021.
68. "M 5.4 – Turkey-Iran border region". United States Geological Survey. May 26, 1977. Retrieved June 9, 2021.
69. "M 5.4 – Turkey-Iran border region". United States Geological Survey. May 26, 1977. Retrieved June 9, 2021.
70. "Significant Earthquake: IRAN: AZARBAIJAN". National Geophysical Data Center. May 26, 1977. Retrieved June 9, 2021.
71. "M 6.0 – Fox Islands, Aleutian Islands, Alaska". United States Geological Survey. May 30, 1977. Retrieved June 9, 2021.
72. "M 6.0 – Fox Islands, Aleutian Islands, Alaska". United States Geological Survey. May 30, 1977. Retrieved June 9, 2021.
73. "M 6.8 – Tonga region". United States Geological Survey. June 22, 1977. Retrieved June 9, 2021.
74. "M 6.8 – Tonga region". United States Geological Survey. June 22, 1977. Retrieved June 9, 2021.
75. "Significant Earthquake: TONGA TRENCH". National Geophysical Data Center. June 22, 1977. Retrieved June 9, 2021.
76. "M 4.6 – Slovenia". United States Geological Survey. July 16, 1977. Retrieved June 10, 2021.
77. "Significant Earthquake: BALKANS NW: SLOVENIA: TRSTENIK,BELA,TENETISE". National Geophysical Data Center. July 16, 1977. Retrieved June 10, 2021.
78. "M 6.9 – Luzon, Philippines". United States Geological Survey. July 21, 1977. Retrieved June 10, 2021.
79. "M 6.9 – Luzon, Philippines". United States Geological Survey. July 21, 1977. Retrieved June 10, 2021.
80. "M 7.2 – Solomon Islands". United States Geological Survey. July 29, 1977. Retrieved June 10, 2021.
81. "M 7.2 – Solomon Islands". United States Geological Survey. July 29, 1977. Retrieved June 10, 2021.
82. "M 6.1 – south of Sumbawa, Indonesia". United States Geological Survey. August 19, 1977. Retrieved June 10, 2021.
83. "M 8.3 – south of Sumbawa, Indonesia". United States Geological Survey. August 19, 1977. Retrieved June 10, 2021.
84. "M 8.3 – south of Sumbawa, Indonesia". United States Geological Survey. August 19, 1977. Retrieved June 10, 2021.
85. "Significant Earthquake: INDONESIA: SUNDA ISLANDS". National Geophysical Data Center. August 19, 1977. Retrieved June 10, 2021.
86. "Tsunami Event: SUNDA ISLANDS". National Geophysical Data Center. August 19, 1977. Retrieved June 10, 2021.
87. "M 7.1 – east of the South Sandwich Islands". United States Geological Survey. August 26, 1977. Retrieved June 10, 2021.
88. "M 6.8 – East Timor region". United States Geological Survey. August 27, 1977. Retrieved June 10, 2021.
89. "M 6.8 – East Timor region". United States Geological Survey. August 27, 1977. Retrieved June 10, 2021.
90. "M 6.2 – Philippine Islands region". United States Geological Survey. August 29, 1977. Retrieved June 10, 2021.
91. "M 6.2 – Philippine Islands region". United States Geological Survey. August 29, 1977. Retrieved June 10, 2021.
92. "M 6.4 – northern Colombia". United States Geological Survey. August 31, 1977. Retrieved June 10, 2021.
93. "M 6.4 – northern Colombia". United States Geological Survey. August 31, 1977. Retrieved June 10, 2021.
94. "Significant Earthquake: COLOMBIA: APARTADO, MEDELLIN". National Geophysical Data Center. August 31, 1977. Retrieved June 10, 2021.
95. "M 6.5 – Vanuatu". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
96. "M 6.5 – Vanuatu". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
97. "M 6.4 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
98. "M 6.4 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
99. "M 6.4 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
100. "M 6.4 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
101. "M 6.6 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
102. "M 6.6 – Rat Islands, Aleutian Islands, Alaska". United States Geological Survey. September 4, 1977. Retrieved June 12, 2021.
103. "M 6.0 – Crete, Greece". United States Geological Survey. September 12, 1977. Retrieved June 12, 2021.
104. "M 6.0 – Tonga". United States Geological Survey. September 13, 1977. Retrieved June 12, 2021.
105. "M 7.2 – south of Tonga". United States Geological Survey. October 10, 1977. Retrieved June 13, 2021.
106. "M 7.2 – south of Tonga". United States Geological Survey. October 10, 1977. Retrieved June 13, 2021.
107. "M 6.1 – Santiago Del Estero, Argentina". United States Geological Survey. October 22, 1977. Retrieved June 13, 2021.
108. "M 5.2 – Bulgaria". United States Geological Survey. November 3, 1977. Retrieved June 13, 2021.
109. "M 5.2 – Bulgaria". United States Geological Survey. November 3, 1977. Retrieved June 13, 2021.
110. "Significant Earthquake: ROMANIA: VELINGRAD". National Geophysical Data Center. November 3, 1977. Retrieved June 13, 2021.
111. "M 6.7 – Andreanof Islands, Aleutian Islands, Alaska". United States Geological Survey. November 4, 1977. Retrieved June 13, 2021.
112. "M 6.7 – Andreanof Islands, Aleutian Islands, Alaska". United States Geological Survey. November 4, 1977. Retrieved June 13, 2021.
113. "M 4.9 – northern Iran". United States Geological Survey. November 9, 1977. Retrieved June 13, 2021.
114. "M 4.9 – northern Iran". United States Geological Survey. November 9, 1977. Retrieved June 13, 2021.
115. "Significant Earthquake: IRAN: GORGAN". National Geophysical Data Center. November 9, 1977. Retrieved June 13, 2021.
116. "M 6.5 – western Xizang". United States Geological Survey. November 18, 1977. Retrieved June 13, 2021.
117. "M 6.5 – western Xizang". United States Geological Survey. November 18, 1977. Retrieved June 13, 2021.
118. "M 7.4 – San Juan, Argentina". United States Geological Survey. November 23, 1977. Retrieved June 13, 2021.
119. "M 7.4 – San Juan, Argentina". United States Geological Survey. November 23, 1977. Retrieved June 13, 2021.
120. "Significant Earthquake: ARGENTINA: SAN JUAN PROVINCE: MENDOZA". National Geophysical Data Center. November 23, 1977. Retrieved June 13, 2021.
121. "M 6.0 – La Rioja, Argentina". United States Geological Survey. November 23, 1977. Retrieved June 14, 2021.
122. "M 6.0 – La Rioja, Argentina". United States Geological Survey. November 23, 1977. Retrieved June 14, 2021.
123. "M 6.0 – San Juan, Argentina". United States Geological Survey. November 24, 1977. Retrieved June 14, 2021.
124. "M 6.0 – San Juan, Argentina". United States Geological Survey. November 24, 1977. Retrieved June 14, 2021.
125. "M 6.3 – San Juan, Argentina". United States Geological Survey. November 24, 1977. Retrieved June 14, 2021.
126. "M 6.3 – San Juan, Argentina". United States Geological Survey. November 24, 1977. Retrieved June 14, 2021.
127. "M 5.8 – central Iran". United States Geological Survey. December 19, 1977. Retrieved June 14, 2021.
128. "M 5.8 – central Iran". United States Geological Survey. December 19, 1977. Retrieved June 14, 2021.
129. "Significant Earthquake: IRAN: BAB-TANGOL". National Geophysical Data Center. December 19, 1977. Retrieved June 14, 2021.
130. "M 6.6 – Red Sea". United States Geological Survey. December 28, 1977. Retrieved June 14, 2021.
131. "M 6.6 – Red Sea". United States Geological Survey. December 28, 1977. Retrieved June 14, 2021.