1751 Port-au-Prince earthquake

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1751 Port-au-Prince earthquake
Haiti relief location map.jpg
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Local dateNovember 21, 1751 (1751-11-21)
Magnitude8.0 Ms
Epicenter 18°30′N72°18′W / 18.5°N 72.3°W / 18.5; -72.3
Areas affected French Haiti
Casualtiesunknown

The 1751 Port-au-Prince earthquake occurred at 12:50 UTC on 21 November in French Haiti, followed by a tsunami. Another earthquake was reported at the same location on 15 September of the same year and it is uncertain whether the two reports refer to the same event. [1]

Seismological analysis

Later seismologists attributed the 1751 earthquake, like that of 1910, to adjustments along the Southern Trough. [2]

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The 1762 Arakan earthquake occurred at about 17:00 local time on 2 April, with an epicentre somewhere along the coast from Chittagong to Arakan in modern Myanmar. It had an estimated moment magnitude between 8.5 and 8.8 and a maximum estimated intensity of XI (Extreme). It triggered a local tsunami in the Bay of Bengal and caused at least 200 deaths. The earthquake was associated with major areas of both uplift and subsidence. It is also associated with a change in course of the Brahmaputra River to from east of Dhaka to 150 kilometres (93 mi) to the west via the Jamuna River.

The 1947 Assam earthquake occurred on 29 July at 13:43 UTC with an Mw of 7.3 and a maximum EMS-98 intensity of V (Strong).

The 1941 Andaman Islands earthquake struck the Andaman Islands on June 26 with a magnitude of 7.7 to 8.1. Details of this event are poorly known as much of Southeast Asia was in the turmoil of World War II. The quake caused severe damage in the Andaman Islands. The tsunami it triggered was reported along the Andaman and Nicobar Islands, India and British Ceylon. There may have been damage and deaths in Bangladesh, Myanmar, and Thailand due to the tsunami.

The 1931 Southwest Sumatra earthquake occurred on 25 September at 05:59 UTC. It was located between the Enggano Island and Sumatra, Indonesia, then under the rule of Dutch East Indies. It had a magnitude of Mw 7.3, or Ms 7.5.

The 1787 New Spain earthquake, also known as the San Sixto earthquake, occurred on 28 March at 11:30 local time. It caused a large tsunami that affected the coast of the Puebla Intendancy and the Oaxaca Intendancy in Southwestern New Spain. With an estimated magnitude of 8.6 on the moment magnitude scale, it was more powerful than any instrumentally recorded Mexican earthquake.

The 1989 Gissar earthquake occurred at 23:02 UTC on 22 January near Gissar in Tajikistan. The shock had a body wave magnitude of 5.3 and a maximum felt intensity of VII on the Mercalli intensity scale. The National Geophysical Data Center reported that the death toll from the event amounted to about 274, and the National Earthquake Information Center stated there were many injured. Nearly all the casualties were caused by mudslides which buried Sharora and two nearby villages. The earthquake was the deadliest in 1989.

The 1892 Vacaville–Winters earthquakes occurred in northern California as a large doublet on April 19 and April 21. Measured on a seismic scale that is based on an isoseismal map or the event's felt area, the 6.4 Mla and 6.2 Mla  events were assigned a maximum Mercalli intensity of IX (Violent), and affected the North Bay and Central Valley areas. The total damage was estimated to be between $225,000 and 250,000 and one person was killed. No evidence of fault movement on the surface of the ground was observed as a result of either of the strong shocks. Both occurred in the domain of the San Andreas strike-slip system of faults, but their focal mechanism is uncertain.

The 1869 Cachar earthquake occurred on 10 January with an estimated moment magnitude of 7.4 and a maximum EMS-98 intensity of VII (Damaging). Two people were killed and damage was considered severe. The earthquake was felt in Upper Burma, Bihar, Jharkhand, Bengal and Northeast India.

The 1843 Guadeloupe earthquake occurred at 10:37 local time on 8 February in the island of Guadeloupe in the Lesser Antilles. It had an estimated magnitude of 8.5, making it the strongest recorded earthquake in the Caribbean and a maximum perceived intensity of shaking of IX on the Mercalli intensity scale. The earthquake was felt widely throughout the Caribbean and as far away as New York. Around 1,500 to 5,000 people were killed.

During April 1819, the area around Copiapó in northern Chile was struck by a sequence of earthquakes over a period of several days. The largest of these earthquakes occurred on 11 April at about 15:00 local time, with an estimated magnitude of Mw 8.5. The other two events, on 3 April between 08:00 and 09:00 local time and on 4 April at 16:00 local time, are interpreted as foreshocks to the mainshock on 11 April. The mainshock triggered a tsunami that affected 800 km of coastline and was also recorded at Hawaii. The city of Copiapó was devastated.

The 1979 Yapen earthquake occurred on September 12 at 05:17:51 UTC. It had an epicenter near the coast of Yapen Island in Irian Jaya, Indonesia. Measuring 7.5 on the moment magnitude scale and having a depth of 20 km (12 mi), it caused severe damage on the island. At least 115 were killed due to shaking and a moderate tsunami.

The 1980 Livermore earthquake occurred on January 24 at 11:00 PST in California. The epicenter of the 5.8 Mw earthquake was a hilly area 12 km (7.5 mi) southeast of Mount Diablo and north of Livermore Valley. The earthquake had a maximum Modified Mercalli intensity of VII. Forty four people were injured and damage across the San Francisco Bay Area totaled $11.5 million, with the majority inflicted at the Lawrence Livermore National Laboratory.

References

  1. National Geophysical Data Center / World Data Service (NGDC/WDS): NCEI/WDS Global Significant Earthquake Database. NOAA National Centers for Environmental Information (1972). "Significant Earthquake Information". doi:10.7289/V5TD9V7K.
  2. Taber, S. (1922), "The seismic belt in the Greater Antilles", Bulletin of the Seismological Society of America, Seismological Society of America, 12 (4): 208, Bibcode:1922BuSSA..12..199T, doi:10.1785/BSSA0120040199