1866 Bingöl earthquake

1866 Bingöl earthquake

Local date	12 May 1866 (1866-05-12)
Local time	Late afternoon
Magnitude	Ms  7.2
Epicenter	39.2°N 41.0°E / 39.2; 41.0[1]
Areas affected	Turkey
Max. intensity	MSK-64 IX (Destructive)
Casualties	>680 fatalities

The 1866 Bingöl earthquake struck the Ottoman Empire on 12 May. It had an estimated surface-wave magnitude of 7.2 and was associated with faulting along the East Anatolian Fault. The earthquake resulted in over 680 fatalities and the destruction of thousands of homes in Bingöl Province.

Tectonic setting

The East Anatolian Fault, a 700-kilometre-long (430 mi) northeast–southwest left-lateral transform fault, represents the boundary between the Anatolian and Arabian plates. The fault displays slip rates that decrease from the east at 10 mm (0.39 in) per year to the west, where it is 1–4 mm (0.039–0.157 in) per year. It was associated with large earthquakes in 1789 (M 7.2), 1795 (M 7.0), 1872 (M 7.2), 1874 (M 7.1), 1875 (M 6.7), 1893 (M 7.1), and 2020 (M_w 6.8). These earthquakes ruptured individual segments of the fault.^[2] This intracontinental transform fault is the second-largest strike-slip fault in Turkey.^[3] The northeastern segment is known as the Karlıova Segment, which has not produced a major earthquake since 1866. An adjacent segment to the southwest ruptured in the 1971 Bingöl earthquake.^[4]

Earthquake

The estimated surface-wave magnitude was 7.2, with a maximum MSK-64 intensity of IX (Destructive) assigned to areas with heavy damage and surface rupture. Surface ruptures were observed in the Göynük Valley, extending south from Halipan village to the Varto district in the north for an estimated 45 km (28 mi). The earthquake was associated with rupture along the northeastern East Anatolian Fault and occurred at the triple junction where it meets the North Anatolian Fault.^[5] The entire 34 km (21 mi) of the Karlıova Segment and 10 km (6.2 mi) of the Ilıca Segment were associated with the earthquake. Surface offsets were estimated at 3.5 ± 0.1 m (11.48 ± 0.33 ft).^[6]

Impact

The Russian consul in Erzurum documented the earthquake's effects, reporting heavy damage along the Göynuk Valley—extending from Çobantaşı in the southwest to Karlıova in the northeast. The French consul of Erzurum also visited the area, documenting severe damage in the districts of Kiğı, Capakcur, and areas further south.^[5]

In the eastern part of Kiğı District, most villages were nearly flattened. At least 1,106 homes were destroyed, and 470 people died in Kiğı District's Göynuk township. In Kurtyuzu township, 100 people died, and 448 homes were razed. In Capakcur District, there were 20 deaths and 200 homes destroyed. At Hromek township, Varto District, 483 homes were ruined or badly damaged. At Asagi Varto, 90 people died, and 136 homes were partly or totally destroyed. An unspecified number of Zazas also died in the Simsor area.^[5]

Shaking was felt in Muş and Hınıs. In Erzurum, some chimneys fell, and one house collapsed. Along the hillside, some homes were damaged, causing widespread panic across the town. Shaking was also felt hundreds of kilometers away in Erzincan, Ordu, and Diyarbakır. Minor damage and cracks in plaster walls were observed in Diyarbakır.^[5]

See also

• List of earthquakes in Turkey

References

1. Demiraş, Ramazan (2019), Doğu Anadolu Fay Sistemi Deprem Etkinliği- Gelecek Deprem Potansiyeli, doi:10.13140/RG.2.2.24235.49449
2. Güvercin, S.E.; Karabulut, H.; Konca, A.O.; Doğan, U.; Ergintav, S. (2022). "Active seismotectonics of the East Anatolian Fault". Geophysical Journal International. 230 (1): 50–69. doi:10.1093/gji/ggac045. Archived from the original on 10 October 2022. Retrieved 6 February 2023.
3. Milkereit, C.; Grosser, H.; Wang, R.; Wetzel, H.-U.; Woith, H.; Karakisa, S.; Zünbül, S.; Zschau, J. (2004). "Implications of the 2003 Bingöl Earthquake for the Interaction between the North and East Anatolian Faults". Bulletin of the Seismological Society of America. 94 (6): 2400–2406. Bibcode:2004BuSSA..94.2400M. doi:10.1785/0120030194.
4. Sançar, Taylan; Serdar, H.; Schreurs, Guido; Zabcı, Cengiz (2018). "Mechanics of plio-quaternary faulting around the Karliova triple junction: implications for the deformation of Eastern part of the Anatolian Scholle". Geodinamica Acta. 30 (1): 287–305. Bibcode:2018GeoAc..30..287S. doi:10.1080/09853111.2018.1533736.
5. Ambraseys, N.N. (1997). "The little-known earthquakes of 1866 and 1916 in Anatolia (Turkey)". Journal of Seismology. 1 (3): 289–299. Bibcode:1997JSeis...1..289A. doi:10.1023/A:1009788609074. S2CID 127249225.
6. Akbayram, Kenan; Kıranşan, Kemal; Özer, Çağlar; Varolgüneş, Sadık (2021). "The surface deformation of the 2020 Doğanyol-Sivrice earthquake (Mw 6.8) and the earlier events suggest Mw˂7.0 earthquakes do not create significant surface slip along the East Anatolian Fault Zone". Tectonophysics.