ahar varzaghan earthquake

- "The 2012 August 11 MW 6.5, 6.4 Ahar-Varzghan earthquakes, NW Iran: aftershock sequence analysis and evidence for activity migration" Seismol. Here is a timeline of some of the major earthquakes in Iran in the past four decades. earthquake 11 minutes later at 05:04 p.m. Figure 4. In the Qarachilar Cu-Mo-Au deposit of the Ahar-Arasbaran metallogenic zone (AAMZ), northwest Iran, mineralization occurs as three quartz-sulfide veins that cut granodiorite-quartz monzodiorite rocks of the Qaradagh batholith (QDB). The dual Ahar-Varzaghan earthquakes occurred on August 11, 2012, at 16:53 (Iran standard time) in East Azerbaijan province of Iran. Varzaqan (Persian: ورزقان ‎; also Romanized as Varzeqān and Warzagan; formerly, Karzigan (Persian: كَرزيگَن), also Romanized as Kārzigān and Karzygan) is a city & capital of Varzaqan County, East Azerbaijan Province, Iran.At the 2006 census, its population was 3,549, in 930 families. As shown in Fig. INTRODUCTION. The recent dual earthquake with Mw = 6:4 and Mw = 6:3 struck the Ahar-Varzaghan area in Earthquake (2012). Triggering of the 2012 Ahar-Varzaghan earthquake doublet (Mw6.5&6.3) by the Sahand Volcano and North Tabriz fault (NW-Iran); Implications on the seismic hazard of Tabriz city Key Words: the Ahar-Varzaghan Earthquake, field investigation, damage to houses and buildings, damage to lifelines INTRODUCTION On the late afternoon of Saturday August 11, 2012 the northwest of Iran was shaken by two of the strong earthquakes in Iranian history (See Figure 1). 1). Villages near the towns of Ahar and Varzaghan, 60km from Tabriz, have been decimated [AFP] Published On 17 Apr . The bulk of strong‐motion data (i.e., 184 records) comes from the 2012 Ahar-Varzaghan dual earthquakes in northwest Iran and their aftershocks. 1).It was followed 11 min later by a second event of comparable size, 6.2 M w.The comparable magnitudes of the two events and their close spatial and temporal relationship justify treating them as an earthquake . Light mag. The situation. Pinterest. We have used the vertical component of acceleration records, which is supposedly free from the site effects. The earthquakes killed 327 people, caused more than 3,000 injuries, and left more than 30,000 homeless. Seismotectonic features of the Ahar-Varzaghan complex fault system are reviewed by the mainshocks/aftershocks study of the 2012 Ahar-Varzaghan earthquake doublet (Mw = 6.5 & Mw = 6.3). Keywords: Ahar-Varzaghan earthquakes, Attenuation, Fourier spectra, Geometrical spreading, Northwestern Iran, Quality factor. The hypocentres of these earthquakes are close (∼6 km) and located near the cities of Ahar and Varzaghan. We estimated the causative rupture length and the downdip causative rupture width using the empirical relations of Wells and Coppersmith (1994), from the earthquake hit at 4:53PM local time with an epicentre around 60 KM from Tabriz and the second one took place at 5:04 PM in the vicinity of Varzaghan. Two earthquakes occurred in 11 August 2012 NW Iran, Ahar region (60 km NE Tabriz), first one in 16:53 local time (Mw 6.4; 23 km west of Ahar) and the second one in 17:04 local time Local reports estimated at least 306 deaths, although official reports stated 229, with more than 3000 injured. The city is famous for the Sungun copper mine, 25 km from the city centre, which is . Also, the modified finite‐fault method, which is able to model nonuniform stress distribution on the fault plane, is employed to investigate the coseismic stress parameter for the first and second . Out of two possible fault planes, the one striking NW-SE gave a much better variance . Ahar-Varzeghan Twin Earthquakes of 11 August 2012, M w.6.4 and M w.6.3. I infer that before AVD seismicity of the central segment of NTF close to SND was very low . Pinterest. The quakes, with magnitudes of 6.4 and 6.3, struck the East Azerbaijan province on Saturday afternoon, flattening villages and injuring thousands of people around the towns of Ahar, Varzaghan, and . The Varzeghan-Ahar twin Earthquakes caused panic among 2 million people in the Azerbaijan province, making many people sleep outside for 2 nights. Introduction In earthquake hazard assessment, it is important to estimate the expected ground motion as a function of distance and earthquake magnitude. The early aftershocks were accurately monitored by a dense local seismological network. Roofs covering buildings in the rural areas in Ahar and Varzaghan regions, prior to the August 11, 2012, twin earthquakes, can be categorized into three main groups: flat roofs composed of wooden beams together with a plaster of straw-mud/clay mixture, traditional masonry dome or vault, and rarely, a steel I-beam jack-arch system. 1, the epicentral area bounded with many historical earthquakes during 1154 years from 858 to 2012 C.E. They proposed that the NGA models could be confidently used for seismic hazard studies of Iran for short-to-median peri-ods. On August 11th, a double earthquake of magnitudes 6.5 and 6.2 Mn hit Azerbaijan province that led to approximately 400 deaths over the region near to Ahar, Varzaghan and Heris. Twardzik, C., Vergnolle, M., Sladen, A., and Tsang, L. L. H. Solid Earth, accepted, doi:10.5194/se-2021-6 (preprint). Earthquake: KHORASAN JONOBI: Preliminary Earthquake Report 2012-Aut.-11 M 6.2 & 6.0: Seismotectonic & Seismology: Earthquake: AZARBAIJAN SHARGHI: Preliminary Earthquake Report 2012-Aut.-11 M 6.2 & 6.0 Ahar-Varzaghan Earthquakes (not set) AZARBAIJAN SHARGHI: Primary report of Sirch earthquake 2011 Jun 26 Mn 5.2 (Sirch, Kerman) (not set) KERMAN The worst damage and most casualties appeared to have been in rural villages around the towns of Ahar, Varzaghan and Harees, near the major city of Tabriz, Iranian media reported. The seismotectonics of this region is controlled by the collision of the Arabia and Eurasia plates; at the latitude of the earthquakes, the Arabia . Most casualties occurred in . The second quake was located just below the first at a depth of around 16 km. Simulation of the first earthquake August 11, 2012 Ahar-Varzaghan using stochastic finite fault method M Mahood, N Akbarzadeh, H Hamzehloo Journal of the Earth and Space Physics 40 (2), 31-43 , 2014 1. Wavelet transform were applied in this study as a powerful technique to detect the transient . IE 11 is not supported. Aug 17, 2012 - Earthquake in East Azerbaijan, Iran ((Cities - Ahar - Harris - Varzaghan)) The largest slip took place during the first 10 seconds while the next slip initiated within 50 seconds. 40(2), 31-43. First was hit by 6.4 Mw Aug 16, 2012 - Earthquake in East Azerbaijan, Iran Cities - Ahar - Harris - Varzaghan. 2012 Ahar-Varzaghan earthquake. They comprised a doublet separated by eleven minutes, with magnitudes of 6.4 and 6.2 M ww. Varzaghan, Ahar and Harsin cities has been the focus of most damages. 2003 Bam Earthquake, Kyoto University, 2003. 2 which shows historical and (a) Variation of successive values (i.e. This article uses data from the strong-motion network installed in the NW Iran to study the seismicity and attenuation of shear waves in this region. Ahar-Varzaghan earthquake; Earthquake precursors. The star symbol and filled circle show the location of the first and second earthquakes, respectively. Two strong earthquakes struck northwest Iran on Saturday, killing 153 people and injuring more than 1,300 as buildings were reduced . File an "I felt it" report if you felt the quake! Papers 1999-2015 - Mehdi Daneshi, Afshin Kalantari, "Effect of a Base Isolation System for Reduction of Annual Seismic Risk of a Steel Building . The Ahar-Varzaghan earthquakes occurred in an area which has experienced no significant historical and instrumental seismicity. The Ahar-Varzaghan earthquake is the one of the rare earthquakes with magnitude greater than 6 in Tabriz. Aug 16, 2012 - Earthquake in East Azerbaijan, Iran Cities - Ahar - Harris - Varzaghan. Varzaghan, Ahar and Heriss suffered different levels of the damage. The ground motion The only significant instrumental earthquake within the NW Iran before the Ahar-Varzaghan earthquake doublet is the 1997 Mw = 6.1 Ardebil earthquake, which has been occurred about 150 km east of the Ahar-Varzaghan earthquakes on an N-S trending fault showing pure left-lateral strike-slip mechanism (Aziz Zanjani et al., 2013). (2014) in a broader range Two earthquakes occurred in 11 August 2012 NW Iran, Ahar region (60 km NE Tabriz), first one in 16:53 local time (Mw 6.4; 23 km west of Ahar) and the second one in 17:04 local time To identify the exact location and epicentre of historical Key Words : the Ahar-Varzaghan Earthquake, field investigation, damage to houses and buildings, damage to lifelines . Today. When autocomplete results are available use up and down arrows to review and enter to select. North-western Iran (Azerbaijan province), one of the most seismic regions of the country, has experienced many seismic events during its long history. Iran is struggling to help the victims of two earthquakes that killed 300 people and injured 5 000 others. 1. The earthquake killed 327 people, claimed more than 3000 injuries and left more than 30000 homeless. Ore formation can be divided into three stages, with chalcopyrite, molybdenite, and gold-bearing pyrite appearing mainly in the first two stages. Google Scholar The city is famous for the Sungun copper mine, 25 km from the city centre, which is . Seismol. On 2012 August 11, an earthquake doublet (M w 6.5 and M w 6.3), separated in time by 11 min, occur in the northwest of Iran. The open solid circles show the location of aftershocks with magnitude MN ≥ 5.0. first earthquake hit at 4:53PM local time with an epicentre around 60 KM from Tabriz and the second one took place at 5:04 PM in the vicinity of Varzaghan. According to the Geological Survey of Iran at least 306 people killed, 3000 injured, 4 villages destroyed and 60 heavily damaged in the epicentral area. Soc. The worst damage and most casualties appeared to have been in rural villages around the towns of Ahar, Varzaghan and Harees, near the major city of Tabriz, Iranian media reported. ︎ 2021 Very early identification of a bimodal frictional behavior during the post-seismic phase of the 2015 Mw8.3 Illapel, Chile, earthquake. Two earthquakes measuring 6.3 and 6.4 on the Richter scale occurred on August 12, 2012, in Ahar, Heris, and Varzaghan in this province, in an area around 5500 km 2 and affected 263,693 people, including 136,000 women in total and 44,265 women in childbearing age. The ground motion Also, the modified finite‐fault method, which is able to model nonuniform stress distribution on the fault plane, is employed to investigate the coseismic stress parameter for the first and second . ︎ 2021 Locating surface deformation induced by earthquakes using GPS, GLONASS and Galileo ionospheric sounding from a single station First mainshock had a pure strike-slip mechanism and the second one also had a thrust component of faulting in addition, based on USGS report. Aug 16, 2012 - Earthquake in East Azerbaijan, Iran Cities - Ahar - Harris - Varzaghan. 2012 Ahar-Varzaghan earthquake using stochastic finite fault method (Motazedian and Atkinson, 2005). On the late afternoon of Saturday August 11, 2012 the northwest of Iran was shaken by two of the strong earthquakes in Iranian history (See Fig. The bulk of strong‐motion data (i.e., 184 records) comes from the 2012 Ahar-Varzaghan dual earthquakes in northwest Iran and their aftershocks. The August 11, 2012 Mw 6.4 earthquakes in northwestern Iran occurred as a result of oblique strike-slip faulting in the shallow crust of the Eurasia plate, approximately 300 kilometer east of the plate boundary between the Eurasia and Arabia plates. Abstract. Today. log N MN ) on the distribution of magnitude for the Ahar-Varzghan sequence. By the time this report was written, official reports of loss of life . Explore. Varzaghan- Ahar Earthquake IIEES report On August 21 st, two earthquakes struck East Azerbaijan Province at 16:53 and 17:04 respectively with a magnitude 6.2 and 6. 3.2 earthquake - 35 km west of Ahar, East Azerbaijan, Iran, on Monday, Nov 1, 2021 5:25 am (GMT +3:30) - For an optimal experience visit our site on another browser. The towns of Ahar, Varzaghan and Heris and their surrounding rural areas are the main earthquake stricken places. The worst damage and most casualties appeared to have been in rural villages surrounding the towns of Ahar, Varzaghan and Harees, near the major city of Tabriz, Iranian media reported. Soc. Key Words: the Ahar-Varzaghan Earthquake, field investigation, damage to houses and buildings, damage to lifelines INTRODUCTION On the late afternoon of Saturday August 11, 2012 the northwest of Iran was shaken by two of the strong earthquakes in Iranian history (See Figure 1). Ahar-Varzeghan Twin Earthquakes of 11 August 2012, M w.6.4 and M w.6.3. However, we cannot n eglect the high . On August 11, 2012, East-Azerbuijan province experienced moderate-size double earthquakes, approximately 60 km northeast of the city of Tabriz. Google Scholar As per Tehran University's . Earth Space Phys. The number of existing masonry schools before and after the earthquake in the three affected cities is presented in Tables 4 and 5 in terms of 123 Bull Earthquake Eng (2016) 14:3195-3229 3203 Fig. Ahar, Khoy, Salmas, Marand and Meymad have been introduced in the Arminieh area: "Ahar - is the village of Meymad and the kingdom of the son of Ravad, one of the children of Jalandi" ¹¹. 1806 to 1856, eight earthquakes were recorded for Tabriz area but, only two incidents were related to North Tabriz fault and the others (like August 11th 2012 Ahar-Varzaghan earthquake) could be related to other tectonic structures and systems. 1 Typical example of effect of 2012 Ahar Varzaghan Earthquake on masonry buildings: a a residential building (Razzaghi and Ghafory-Ashtiany 2012 . The Ahar-Varzaghan Earthquake Doublet (Mw 6.4 and 6.2) of 11 Agust 2012: Regional Seismic Moment Tensors and a seismotectonic Interpretation, Bull. The worst damage and most casualties appeared to have been in rural villages around the towns of Ahar, Varzaghan, and Harees, near the major city of Tabriz, Iranian media reported. ‫Estimation of shear wave quality factor in the region of the 2012 Ahar-Varzaghan twin earthquakes using aftershock data February 2020 ULUM-I ZAMIN 29(114):123-128 When autocomplete results are available use up and down arrows to review and enter to select. The 6.4 M w Varzaghan-Ahar (named after two nearby cities) earthquake occurred at 12:23 UTC on 2012 August 11 in East Azerbaijan province in northwestern Iran (Fig. The time-frequency characteristics of ground motion records during these events which caused widespread damage to the structures are investigated in detail. INTRODUCTION. Aug 17, 2012 - Earthquake in East Azerbaijan, Iran ((Cities - Ahar - Harris - Varzaghan)) Features interactive map, read user reports and get links to further info. First was hit by 6.4 Mw at 16:54 local time (12:23 GMT), and Seismic history of the North Tabriz fault (NTF), the main active fault of Northwestern Iran near Tabriz city, and its relation to the Sahand active Volcano (SND), the second high mountain of the NW Iran, and to the 11 August 2012 Ahar-Varzaghan earthquake doublet (Mw6.5&6.3) (AVD), is investigated. The 2012 East Azerbaijan earthquakes - also known as the Ahar earthquakes - occurred on 11 August 2012, at 16:53 Iran Standard Time, near the cities of Ahar and Varzaqan in Iran's East Azerbaijan Province, approximately 60 kilometers (37 miles) from Tabriz. 1. Introduction In earthquake hazard assessment, it is important to estimate the expected ground motion as a function of distance and earthquake magnitude. Earth Space Phys. The two quakes measured 6.3 and 6.4 on the moment magnitude scale, with the second quake occurring 11 min after the first. Mahood, M., Akbarzadeh, N. and Hamzehloo, H. [2014] " Simulation of the first earthquake August 11, 2012 Ahar-Varzaghan using stochastic finite fault method," J. Varzaqan (Persian: ورزقان ‎; also Romanized as Varzeqān and Warzagan; formerly, Karzigan (Persian: كَرزيگَن), also Romanized as Kārzigān and Karzygan) is a city & capital of Varzaqan County, East Azerbaijan Province, Iran.At the 2006 census, its population was 3,549, in 930 families. activity of the fault responsible for Varzaghan earthquake in the. Seismol. the Ahar-Varzaghan earthquakes. The towns of Ahar, Varzaghan and Heris and their surrounding rural areas are the main earthquake stricken places. Touch device users, explore by touch or with swipe . relationship between this earthquake and Ahar-Varzaghan . Two Earthquakes with the magnitude of 6.2 and 6.3 on the Richter scale rocked north-western Iran, East Azerbaijan province on 11 August 2012. The results show that the behavior of the representative structures by process of correction with causal . Therefore, the completeness of data set used here is MN = 2.0 which is identified in panel (a) by a vertical dashed line. PERFORMANCE OF ESSENTIAL FACILITIES IN THE 2012 VARZAGHAN-AHAR EARTHQUAKES Tariq MAHDI Assistant Professor, BHRC, Tehran, Iran E-mail address:mahdi@bhrc.ac.ir Keywords: Important Buildings, Varzaghan-Ahar Earthquake, Seismic Codes, Architectural Elements, Non-Structural Components EXTENDED ABSTRACT The northern part of East Azerbaijan Province was the scene of many earthquakes in the past. Detailed earthquake information - overview map, magnitude, time, depth, source, shake map, list of reports. 40(2), 31-43. The earthquakes destroyed more than 20 villages and damaged the cities of Varzaghan, Ahar, and Heriss. Iranian earthquake regional catalog extending from January 1, 2006, to May 18, 2015, was used to detect significant changes before and after August 11, 2012, Ahar-Varzaghan (AV) earthquake (12:23) of NW Iran in the seismicity rate and size, V P /V S and b value. The Ahar-Varzaghan Earthquake Doublet (Mw 6.4 and 6.2) of 11 Agust 2012: Regional Seismic Moment Tensors and a seismotectonic Interpretation, Bull. Mahood, M., Akbarzadeh, N. and Hamzehloo, H. [2014] " Simulation of the first earthquake August 11, 2012 Ahar-Varzaghan using stochastic finite fault method," J. he is shepherd and he is working even after a heavy earthquake because their cows need food and they need them because of milk and meet.The Ahar-Varzaghan earthquake doublet is the only large. Keywords: Ahar-Varzaghan earthquakes, Attenuation, Fourier spectra, Geometrical spreading, Northwestern Iran, Quality factor. In histogram of Fig. On 11 August 2012, Ahar-Varzaghan twin earthquakes (M6.3 and M6.4) caused more than 300 deaths . Seismol. . Touch device users, explore by touch or with swipe . At least 306 people died and more than . The rupture process of both main shocks is retrieved by inverting the near-field strong motions data and using the elliptical subfault approximation method. models against a database constructed from 2012 Ahar- Varzaghan dual earthquakes and 1997 Ardabil event. An injured person is taken to hospital in Ahar August 11, 2012. Two earthquakes measuring 6.3 and 6.4 on the Richter scale occurred on August 12, 2012, in Ahar, Heris, and Varzaghan in this province, in an area around 5500 km 2 and affected 263,693 people, including 136,000 women in total and 44,265 women in childbearing age. (b) Discrete and cumulative distribution of MN . It is clear on figure that the variation of log N MN ratio is approximately constant for MN ≥ 2.0. Some buildings damaged at Tabriz. In this book such cities as Qaban, Barda, Ganja, Teflis, Sogh Aljabal, Shirvan, Baku, and many other present-day cities in the north of the Aras-river . Information bulletin Iran: Earthquake Accelerogram records have been used from five stations in successive earthquakes of Ahar-Varzaghan on August 11, 2012, and six stations that recorded the Sarpole-Zahab earthquake on November 12, 2017, for incremental dynamic analysis (IDA). 2003 Bam Earthquake Post Disaster Research Team, Kyoto University, 2004. The correlation coefficient, the name, component and azimuth of station are given on the left side of each waveform. The worst damage and most casualties appeared to have been in rural villages around the towns of Ahar, Varzaghan and Harees, near the major city of Tabriz, Iranian media reported. 2012 Ahar-Varzaghan Earthquake, IIEES, 2012. 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