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Tehran (tɛəˈræn,_-ˈrɑːn,_ˌteɪ-; Tehrân tehˈɾɒːn) is the capital and most populous city of Iran, capital of Tehran province and Tehran county. Tehran city had a population of 9,039,000 in the estimate of 2022 and according to the 2018 estimate of the United Nations, it is the 34th most populous city in the world and the most populous city in West Asia, Tehran metropolis is also the second most populated metropolis in the Middle East. In the classical antiquity, part of the territory of present-day Tehran was occupied by Rhages (now Ray), a prominent Median city destroyed in the medieval Arab, Turkic, and Mongol invasions. Modern Ray was absorbed into the metropolitan area of Greater Tehran. Tehran was first chosen as the capital of Iran by Agha Mohammad Khan of the Qajar dynasty in 1786, because of its proximity to Iran's territories in the Caucasus, then separated from Iran in the Russo-Iranian Wars, to avoid the vying factions of the previously ruling Iranian dynasties. The capital has been moved several times throughout history, however, and Tehran became the 32nd capital of Persia. Large-scale construction works began in the 1920s, and Tehran became a destination for mass migrations from all over Iran since the 20th century. Tehran is home to many historical sites, including the royal complexes of Golestan, Sa'dabad, and Niavaran, where the last two dynasties of the former Imperial State of Iran were seated. Tehran's landmarks include the Azadi Tower, a memorial built under the reign of Mohammad Reza Shah of the Pahlavi dynasty in 1971 to mark the 2,500th anniversary of the Persian Empire, the Milad Tower, the world's sixth-tallest self-supporting tower, completed in 2007, and the Tabiat Bridge, completed in 2014. Most of the population are Persian, with roughly 99% of them speaking the Persian language, alongside other ethnolinguistic groups in the city which became assimilated. Tehran is served by Imam Khomeini International Airport, alongside the domestic Mehrabad Airport, a central railway station, Tehran Metro, a bus rapid transit system, trolleybuses, and a large network of highways.

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Long-term triggered seismicity on the Mosha fault by Damavand volcano, Iran: Implications on the seismic hazard of Tehran metropolis

Seyyedmaalek Momeni

The seismic history of the Mosha fault, the largest and most active fault of Eastern Tehran metropolis, and its relation to the Damavand active volcano, the highest mountain in the Middle East, is investigated. We deduce that the central Mosha, near the Damavand, has a higher seismicity than either its western or eastern segments. On 7 May 2020, an Mw 5.1 earthquake occurred on the central Mosha, about 40 km east of Tehran and 10 km southwest of the Damavand crest, and it was felt intensely in Tehran. Its rupture is imaged and located in a region that presented a relative seismic quiescence compared to its eastern and western parts, during the last 14 years, suggesting its partial locking and heterogeneous distribution of fault frictional strength on this segment of Mosha. Its significant directivity to the west is confirmed by the mainshock rupture model, its PGA distribution, and distribution of early aftershocks. The rupture model suggests a relatively small stress drop of 2.6 bar, which is consistent with the comparatively high rupture dimension of 9 km for a Mw 5.1 earthquake, and indicates the easy rupture expansion on the central Mosha near the Damavand Volcano. The central Mosha experienced earthquakes in 1930, 1955, and 1983, as well as high microseismic activity and the 2020 seismic sequence, all of which strongly point to a possible influence of the Damavand Volcano on the seismicity of the central Mosha. This is corroborated by the observation of hydrothermal zones on the Mosha fault and the extension of a sill-like Damavand young magma chamber until central Mosha in tomography studies. We propose that the existing heat may increase the pore pressure on the fault, which lowers the effective normal stress, facilitates the nucleation-expansion of the rupture, and unclamps the fault. Damavand could act as a fuse and nucleate earthquakes, and if the rupture extends toward the west, it could have a significant directivity effect on low-frequency seismic waves that reach Tehran without attenuation and affect tall structures. In addition, high site amplification for frequencies up to 16 Hz due to the deep sedimentary basin, mainly in the mid-city of Tehran, will be remarkable for short buildings.

2022

Where is my place? Native home and culture in Iranian immigrants' homemaking

Maryam Jafarbegloo

This research investigates homemaking of culturally diverse groups. Homemaking is a process, which is created by residents through the understanding of forms and belongings to represent and celebrate events throughout new structures and objects. Homemaking also is influenced by residents¿ domestic traditions. The investigation of this phenomenon is the focus of this study. Several questions are discussed, partly related to understanding the meaning of home among immigrants, and partly aiming to discover the relation between homemaking and immigrants¿ previous home in their house country. In order to answer the research questions, the present study examines the tensions of immigrants to change different parts of their houses to understand how their homemaking is affected by their domestic culture and memories of their house in their native country. The research contains two main parts. The first part explains a theoretical framework and the bodies of knowledge, while the second part focuses on the analysis of findings and conclusions. In the second part of the research, a study on transformation of domestic traditions on modern house architecture in Tehran aims at discovering respective achievements related to the use of space based on cultural values. In addition, similarities and differences between immigrants¿ current houses in two different host countries and their previous houses in their native countries are observed and examined. Throughout this part, those aspects of domestic tradition, which are transferred by immigrants in the settling process, are investigated. The city of Tehran is considered as a benchmark to achieve all documents from the immigrant houses in their native country during the second Pahlavi period. In addition, as the host cities, Hamburg from Germany and Zürich from Switzerland are studied to answer the research questions with a comparative analysis from Iranian families. In addition, four types of modern houses, including detached houses, row houses, high-rise apartments, and slum houses (Alunak), built in 1940-1979 in Tehran, are examined to understand the immigrants¿ previous houses. The results of this research reveal that homemaking among immigrants serves the creation of the feeling of being at home pursued by immigrants¿ culture in order to recall their houses in Tehran. Results unravel a strong relationship between the immigrants¿ domestic traditions in Iran and their homemaking in Zürich and Hamburg. The Iranian traditional aspects commonly introduce influential factors in homemaking of Iranian immigrants. Some common findings of homemaking process, which are the results of the transformation of Iranian immigrants¿ domestic culture to Zürich and Hamburg, introduce an adaptation of the original Iranian house according to several common factors as follows: ¿ Renovation of the interior arrangement of spaces like living room and kitchen based on their houses in Tehran. ¿ The importance of privacy forces the families to make their home by covering the windows with curtains, covering the yards by tall greenery walls, and separating the interior plans into public and private sections. ¿ Owing to guest hospitality, the houses are furnished to offer sufficient space for guests same as the houses in Tehran, thereby providing different daily and nightly functions for the rooms.

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Tehran

Iranian Revolution

The Iranian Revolution (انقلاب ایران, Enqelâb-e Irân ʔeɴɢeˌlɒːbe ʔiːɾɒːn), or the Islamic Revolution (انقلاب اسلامی, Enqelâb-e Eslâmī), was a series of events that culminated in the overthrow of the Pahlavi dynasty in 1979. The revolution also led to the replacement of the Imperial State of Iran by the present-day Islamic Republic of Iran, as the monarchical government of Mohammed Reza Pahlavi was superseded by the theocratic government of Ruhollah Khomeini, a religious cleric who had headed one of the rebel factions.

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