The 1894 Istanbul earthquake occurred in the Çınarcık Basin or Gulf of Izmit in the

Sea of Marmara The Sea of Marmara,; grc, Προποντίς, Προποντίδα, Propontís, Propontída also known as the Marmara Sea, is an inland sea located entirely within the borders of Turkey. It connects the Black Sea to the Aegean Sea via the ...

on 10 July at 12:24pm. The earthquake had an estimated magnitude of 7.0. At least an estimated 1,349 people were killed in towns around the Gulf of Izmit such as

Yalova Yalova is a market-gardening town located in northwestern Turkey on the eastern coast of the Sea of Marmara. The town has a population of 156,838, while the population of the surrounding Yalova Province is 291,001 . A largely modern town, it i ...

, Sapanca and

Adapazarı Adapazarı () is a city in northwestern Turkey and the central district of Sakarya Province. The province itself was originally named Adapazarı as well. Adapazarı is a part of the densely populated region of the country known as the Marmara Re ...

, and in the nearby city of

Constantinople la, Constantinopolis ota, قسطنطينيه , alternate_name = Byzantion (earlier Greek name), Nova Roma ("New Rome"), Miklagard/Miklagarth ( Old Norse), Tsargrad ( Slavic), Qustantiniya (Arabic), Basileuousa ("Queen of Cities"), Megalopolis ( ...

(now known in English under its Turkish name,

Istanbul Istanbul ( , ; tr, İstanbul ), formerly known as Constantinople ( grc-gre, Κωνσταντινούπολις; la, Constantinopolis), is the List of largest cities and towns in Turkey, largest city in Turkey, serving as the country's economic, ...

). The main shock caused a tsunami high.

Background

The

is a

pull-apart basin In geology, a basin is a region where subsidence generates accommodation space for the deposition of sediments. A pull-apart basin is a structural basin where two overlapping (en echelon) strike-slip faults or a fault bend creates an area of cr ...

formed at a releasing bend in the

North Anatolian Fault The North Anatolian Fault (NAF) ( tr, Kuzey Anadolu Fay Hattı) is an active right-lateral strike-slip fault in northern Anatolia, and is the transform boundary between the Eurasian Plate and the Anatolian Plate. The fault extends westward fro ...

, a right-lateral

strike-slip fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tecton ...

. This local zone of extension occurs where this transform boundary between the

Anatolian Plate The Anatolian Plate is a continental tectonic plate comprising most of the Anatolia (Asia Minor) peninsula (and the country of Turkey). To the east, the East Anatolian Fault, a left lateral transform fault, forms a boundary with the Arabian Pl ...

and the

Eurasian Plate The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and ...

steps northwards to the west of Izmit from the Izmit Fault to the Ganos Fault. The pattern of faults within the Sea of Marmara basin is complex but near Istanbul there is a single main fault segment with a sharp bend. To the west, the fault trends west-east and is pure strike-slip in type. To the east, the fault is NW–SE trending and show evidence of both normal and strike-slip motion. Movement on the Gulf of Izmit section of the fault, which bounds the Çınarcık Basin, is the most likely cause of the 1894 event. Other possible causes are movement on the Prince's Islands segment of the fault (to the west of the Gulf of Izmit), and movement on a

normal fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectoni ...

in the Çinarcik basin, separate from the North Anatolian Fault.

Damage

The earthquake is estimated to have generated shaking with a

modified Mercalli intensity The Modified Mercalli intensity scale (MM, MMI, or MCS), developed from Giuseppe Mercalli's Mercalli intensity scale of 1902, is a seismic intensity scale used for measuring the intensity of shaking produced by an earthquake. It measures the effe ...

of 9 at Sapanca, 8.5 at

, and 8 at

Büyükçekmece Büyükçekmece is a district and municipality in the suburbs of Istanbul, Turkey on the Sea of Marmara coast of the European side, west of the city. It is largely an industrial area with a population of 380,000. The mayor is Hasan Akgün ( CHP) ...

Gebze Gebze (,) is a district in Kocaeli Province, Turkey. It is situated 65 km (30 mi) southeast of Istanbul, on the Gulf of Izmit, the eastern arm of the Sea of Marmara. Gebze is the largest district per population size in the province as ...

Kartal Kartal is a district of Istanbul, Turkey, located on the Asian side of the city, on the coast of the Marmara Sea between Maltepe and Pendik. Despite being far from the city centre, Kartal is heavily populated (total population of 541,209) (20 ...

Küçükçekmece Küçükçekmece (; meaning “small-drawer”, from much earlier ''Rhagion'' and ''Küçükçökmece as “little breakdown''" or “''little depression''”, in more ancient times just as Bathonea), is a suburb and district of Istanbul, Turk ...

and on the Prince's Islands. The quake killed 990 people in the area around Yalova and Sapanca, 83 in

and 276 in Istanbul.

Background

Damage

See also

References

Further reading