Hadi Jarahi- Research Assistant
- Researcher at Islamic Azad University North Tehran Branch
Hadi Jarahi
- Research Assistant
- Researcher at Islamic Azad University North Tehran Branch
Paleo Mega Lake of Rey Theory (PAMELA);
Seismic Hazard Assessment Methodology;
Ez-Frisk software development
About
72
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Introduction
My research centers on paleo shorelines, paleo lakes, and climatology. I am working on the Paleo Mega Lake of Rey theory (PAMELA). This is the Largest Lake in world History and is located in central Iran. PAMELA at the level of 1010m was 1.7 times larger than the Caspian Sea.
Seismic hazard assessment is another part of my research.
Current institution
Additional affiliations
January 2025 - present
Position
- Research Assistant
Description
- I specialize in paleolake studies, focusing on reconstructing past climatic and environmental conditions through sediment analysis. A notable project involves the discovery and investigation of the Paleo Mega Lake of Rey (PAMELA). Utilizing advanced optical dating techniques, our research aims to determine sediment ages accurately, enhancing our understanding of environmental responses to climatic shifts.
January 2016 - present
Moshaver Hamrah Company
Position
- Head of Department
Description
- Earthquake Engineering Research projects
Education
September 2009 - September 2011
September 2004 - July 2009
Publications
Publications (72)
Earthquakes are one of the most devastating natural hazards, resulting in untold casualties and destruction worldwide. The extent of destruction depends on various factors, of which the distribution of Quaternary sediments where a construction site lies stands out. These sediments control the amount of shear wave velocity and site amplifications. T...
This study presents evidence for the existence of a vast and ancient lake that occupyed a large area of central Iran during the Holocene. The northwestern fringe of the lake, located in the southeast of Tehran, was chosen as the study area. Remains of a Paleo Lake scarp was studied using aerial photographs, Quick Bird satellite imagery, and topogra...
The objective of this study is to evaluate the seismic hazard at the Esfarayen-Bojnurd railway using the probabilistic seismic hazard assessment (PSHA) method. This method was carried out based on a recent data set to take into account the historic seismicity and updated instrumental seismicity. A homogenous earthquake catalogue was compiled and a...
In this study the results of PSHA deaggregation for 5%-damped 0.2, 0.5, 2 and 4 s spectral accelerations, corresponding to Mean Return Periods (MRPs) of 50 and 475 yr for Karaj city was presented. The aim of this paper is to quantify the dominant events that have the most contribution on ground-motion exceedance from the above mentioned hazard leve...
Over the past decade, a vast ancient Lake has been discovered in the central region of Iran, known as the Paleo Mega Lake of Rey (PAMELA). Considering that the presence of water in the lake coincides with the existence of human civilizations in the region, it is expected that references to this lake may be found in ancient Iranian texts. In this pa...
Geological phenomena are constantly changing and evolving due to tectonic activity and erosion. The current state of the Earth is a result of the interaction between these two forces. Paleo mega Lake of Rey, once the largest freshwater lake in the world, covered nearly half of the country and has left behind extensive coastal shores. This study aim...
Paleo Mega Lake of Rey, which is 1.7 times larger than the Caspian Sea, has existed on Iran's central plateau for at least 10,000 years. The shores of this lake extend from Kashan, passing south of Rey, reaching Semnan, and continuing to Kandahar and Shahr Sokhte. In the Yazd region, particularly in the cities of Meybod, Bideh, and Aqda, traces of...
During the Quaternary period, numerous lakes formed in the middle latitudes of the Earth due to the melting of glaciers. However, many of these lakes disappeared due to climate change, particularly in the Holocene epoch. Among them was the ancient Paleo Mega lake of Rey, the largest historical lake in the world, located in Iran. Its shorelines exte...
Land subsidence is one of the geomorphological and geotechnical phenomena that occurs due to ground surface reduction caused by factors such as excessive groundwater extraction, natural resource exploitation, and human activities. This phenomenon can lead to serious problems for infrastructure, the environment, and human communities. This paper stu...
The Damghan fault is located north of Damghan city. Fault activity in Holocene sediments has influenced the direction of local streams. Displacements of ridges and rivers demonstrate evidence of right-lateral movement. Field studies and satellite imagery indicate that the maximum displacement is approximately 70 meters. Ambreasys and Melville (1982...
In this study, the concentration of heavy metals in water and sediments in four stations of Chabahar Lagoon was investigated. Ecological risk index (RI), pollution load index (PLI), and land accumulation index (Igeo) were used to evaluate the ecological risk of heavy metals in the sediment environment. To evaluate the risk of these metals to human...
This research was conducted with the aim of investigating the effect of urban land use on the amount of biological pollution of urban runoff, the possibility of its reuse, and finding the amount of pollution in the quality of urban runoff in District 6 of Tehran. To carry out this study, first, urban sub-basins with different dominant land uses (re...
Extended Abstract
Introduction
Heavy metals are a group of pollutants that can cause serious environmental problems because they are very toxic, persistent, and can accumulate and magnify in living organisms, especially in coastal and marine ecosystems. Sediments are the main sink for these pollutants, and measuring the metals in sediments is impor...
Indiscriminate extraction of underground water sources and use of pesticides in the last few decades has caused the drop of underground water level and a sharp decrease in the quality of the aquifer. This research has been considered in order to investigate the nature and dimensions of this type of pollution from the point of view of agriculture in...
The aim of this study is to provide a probabilistic modified Mercalli intensity (PMMI) map based on seismological studies for the Maku Quadrangle. The study area is located in the NW corner of Iran. The occurrence of several destructive earthquakes and the existence of active faults represent a high level of seismicity in this area. While investiga...
The unprincipled exploitation of natural resources and the production of pollutants in modern society have threatened the underground water and caused the pollution of the subsurface aquifers. The purpose of this research is to evaluate the pollution of the underground aquifer of Kerman Plain. In this regard, the water quality index is used as one...
As one of the most prosperous plains in Iran, the Jiroft plain is located in the northwest corner of the Jazmoriyan Playa in the southeast of Iran. During the last two decades, various factors have caused a sharp drop in the aquifer level from 40 meters to 240 meters in this area and caused land subsidence. Surveys indicate a rate of 15 cm for land...
The city of Dosari is located in Jiroft in the south of Kerman province. The tectonics has caused the formation of a fault spring along a seasonal river in the northeast of this city. Another seasonal river on the eastern side directs water from the northern mountains of Jazmurian to this area. In this study, using satellite images and field studie...
During the Holocene, the Paleo Mega Lake of Rey covered a wide area of land. This ancient lake needs comprehensive studies to identify its evidence and effects on various natural sciences. This article aims to study the morphology, hydrology, and geography of the lake in the past. In this regard, water levels that were identified in the previous st...
زلزله یکی از خطرات طبیعی است که طی سالها باعث تلفات و خسارات مالی زیادی در سراسر جهان شده است. به همین دلیل است که مطالعات تجزیه و تحلیل خطر زلزله باید با جدیت بیشتری مطالعه شود. ایران در یکی از مناطق لرزه خیز جهان، کمربند هیمالیا- آلپ قرار دارد که هر ساله زلزله های زیادی را تجربه می کند. تابع شدت آریاس، به عنوان یکی از پارامترهای مهم زمین لرزه، به...
On 7 May 2020, the Damavand earthquake with magnitude 5.1 occurred at 55 km east of Tehran city, which has a population of over 15 million people. This earthquake caused a seismic hazard for the capital of Iran. In this study, this earthquake was assessed to understand whether it will cause any seismic disaster. There is a doubt about the dip of th...
Earthquakes as one of important Natural hazards, has caused the destruction of Tehran (Ray civilization) in history. However, extensive studies conducted in the recent decade reject all previous findings of the cause of these incidents. Paleoseismological studies show that the escarpment of North Rey, South Rey, and Kahrizak faults have no evidence...
Tehran, one of the most populous cities in the world, is surrounded by several active faults. The destruction of this city has been reported many times in the historical records. The most important factors that played a role in these destructions have usually been taken to be the three active faults named North Rey, South Rey, and Kahrizak, which h...
The severity of the damage in earthquakes depends on various factors; one of the most important reasons is the geological condition of sites i.e. the distribution of Quaternary sediments. These sediment layers control seismic impedance related to the velocity and density of the layers in the ground. Because of the amplified ground motion amplitudes...
On 7 May 2020, the Damavand earthquake with magnitude 5.1 occurred at 55 km east of Tehran city, which has a population of over 15 million people. This earthquake caused a seismic hazard for the capital of Iran. In this study, this earthquake was assessed to understand whether it will cause any seismic disaster. There is a doubt about the dip of th...
Damavand earthquake with magnitude 5.1 was accurate on 7 May 2020 at 55km east of Tehran city with a population of over 15 million peoples. The aim of this paper is to the assessment of these earthquake properties. There is a doubt about the earthquake fault. Because of the hypocenter position, as well as the aftershocks, correspond to the surface...
Earthquake catalogs are collections of earthquakes registered as parametric data like location, time, and magnitude. They are the basis of countless seismological analyses including hazard assessments, stress analysis, and seismicity forecasting. With the appearance of digital seismometers in the early 80s the collection of large earthquake catalog...
This table is prepared to compare seismic hazard analysis software.
This note is about how to select the best software for seismic hazard assessment. The ability of Open Quake and Ez-Frisk Softwares has been compared.
In this study, we use the Ez-Frisk(Ez-FRisk 2018) software to calculate the Modified Mercalli Intensity (MMI) values. For this purpose, the seismic sources database with whole seismicity parameters should be defined. We use a 3-dimensional representation of the geometry of a fault source. A fault is characterized by its surface trace and its vertic...
Seismic hazard studies constitute the initial step in seismic risk assessment and mitigation and provide the basis for the seismic demand for the design of engineered structures. The basic questions that are expected to be answered in this multidisciplinary field are the time and location of probable earthquakes, the ground motion intensity from th...
This work constitutes an integration of geoarchaeological and Paleoclimatology data from SE Tehran, for assessing the influence of Paleogeography and Paleoclimatic changes in relation to the migration of civilizations during the Holocene. We used the satellite imagery from the range of 1969 to 2019 to find the shoreline scarps. Then the field study...
This work constitutes an integration of geoarchaeological and Paleoclimatology data from SE Tehran, for assessing the influence of Paleogeography and Paleoclimatic changes in relation to the migration of civilizations during the Holocene. We used the satellite imagery from the range of 1969 to 2019 to find the shoreline scarps. Then the field study...
Quaternary fault escarpment or Paleo shoreline, Case study Eslamshahr Metro, Southeast of Tehran
(Tectonic studies at the intersection of the North Ray fault with the Islamshahr metro)
در سال 1999 نرم افزار EZ-Frisk پا به عرصه جهانی گذاشت و توانست تمامی نقص های نرم افزار های پیشین را پوشش دهد. این نرم افزار هر ساله توسط شرکت آمریکایی سازنده به روز رسانی شده و نسخه جدیدی با قابلیت های نوین، وارد بازار می نماید و هم اکنون نسخه 7.52 این نرم افزار مربوط به سال 2013 به صورت قفل شکسته در دسترس می باشد(نسخه به روز این برنامه 7.65 است)....
This paper estimates the seismic hazard analysis for Shiraz city. The methodology of this study is the probabilistic seismic hazard assessment. The Shiraz city is located in Zagros zone and has high seismicity. According to tectonic and seismotectonic studies, the most important seismic source is Sabzpoushan fault. PSHA method shows that PGA about...
The objective of this study is to evaluate the seismic hazard at the Esfarayen-Bojnurd railway using the probabilistic seismic hazard assessment (PSHA) method. This method was carried out based on a recent data set to take into account the historic seismicity and updated instrumental seismicity. A homogenous earthquake catalogue was compiled and a...
Awareness of seismicity, is the earliest requirement in seismic design of Dam constructions. This article is devoted to study on Seismotectonic and seismicity and also seismic risk analysis of the Baychebaq reservoir dam. These studies involve detecting seismic sources and assessing seismicity parameters. According to the studies, Peak Ground Accel...
The Choqazanbil temple located at 60 km of south west of shush city in the south west of Iran. This temple with 3500 years archaism is one of the oldest historical titles in Iran. The temple position is close to the Sardarabad anticline with Neogene to Quaternary deposits. Many news about damaging of ancient buildings are reported most recently. Th...
This study aims to studies on morphotectonic in Chalus River Basin. The 9 sub-basins was detected to atudy on each of them separately. During this process, 10 morphotectonic indexes using ArcGIS software was assessed and measured.To provide general overview of the status of each sub-basin, potential index maps were drawn for all of theme. Finally,...
The earthquake hazard is most important title in seismic design of buildings. One of ways to know this hazard is to know where the earthquake boundary is. Moreover, understanding of the future earthquakes location, can help to modify the seismic hazard maps. The b-values, is the effective parameter on future earthquake positioning. This study was c...
Seismic Hazard map of Karaj city
Using EZ-FRisk 7.65 software
Takavar and Ebtehaj tunnels as part of Haraz highway are located in southwestern Damavand mount. Statistics show enormous financial and human damages in this route because of rockfall. Geological and topographical conditions, caused to the intensity of rockfall, because most of heights in this area covered by Damavand Trachyandesitic lava flows. In...
This study presents seismic hazard analysis and provides
spectral iso-acceleration maps based on slip rate (SR) and also activity
rate (AR) of the faults. Nowadays modern seismic design of structures is
complicated so special attention to the nature of the seismicity in active
seismic zones like Tehran is required. Many studies, based on seismic
ha...
This study aimed to the spectral acceleration hazard analysis and mapping of the earthquake in Tehran metropolitan area on the fault slips rate (SL) and activity rate (AR) of the region, is taken into consideration. Modern seismic design of structures that are unique complexities in seismic areas such as Tehran requires special attention to the nat...
oil traps, hidden structural patterns, isodepth data, Persian Gulf fault The Zagros zone is considered an important seismotectonic element for ages because of oil traps. The formation and destruction of these oil traps are primarily influenced by fold systems and their relationship with fault zones. In this research, the seismotectonic components o...
The studied area is located in transition zone between the highly elevated Eastern Alborz ranges and low relief northern of Central Iran and therefore representing two structural zones. In this area, North Shahrud and Astaneh (and Attari) faults with NE-SW trend and Damghan, Dehmolla and Tazareh faults with E-W trend (which located in mountain-plai...
این پژوهش به منظور بررسی لرزه خیزی و لرزه زمین ساخت و همچنین پهنه بندی خطر زمین لرزه در گشتره شهر کرج صورت می پذیرد. هدف از چنین مطالعاتی، حصول اطمینان از پایداری سازه های کنونی در برابر شتاب زمین لرزه و همچنین برآورد پارامتر شتاب برای سازه های آتی در این گستره می باشد. روش انجام این مطالعات بر اساس گردآوری کاتالوگ زمین لرزه های تاریخی و دستگاهی گس...
این مقاله به منظور بررسی و انجام مطالعات لرزه خیزی لرزه زمین ساخت و تحلیل خطر زمین لرزه گستره ۱۵۰ کیلومتری سد مخزنی بایچه باغ در شمال غرب شهرستان ماه نشان مورد توجه قرار گرفته است. این بررسی ها شامل شناسایی چشمه های لرزه زا و برآورد پارامترهای لرزه خیزی می باشند. براساس این مطالعات بیشینه مقادیر شتاب و طیف خطر برای مؤلفه افقی به روش احتمالی در ساخت...
The Iran climatology has been changed by past the time. Shrivel of Hamoun and Orumiyeh lakes are flow this change. In this article, geographical position of Qomes Civilization and its relation with Hajaliqoli Desert in far years ago was studied. The information used from Radar data and satellite imagery. At the result it’s detected the Qomes Civili...
As know the Iran climatology has been changed by pas the time, Shrivel of Hamoun and Orumiyeh lakes are flow this change. In this article geographical position of Sukhte City and its relation with Hamoun lake width in far years ago was studied. The information used from Radar data and satellite imagery. At the result it’s detected the Sukhte City i...
The Behjatabad dam area is located in Qazvin province and 65 km away from the Abyek city to the North West direction. The Earthquakes occurred in this area are shallow and often have superficial fissures. In this paper, try to be specific features of dam seismicity using regional tectonic maps, aerial and satellite photos and set of seismic data. E...
The study area is located within the range of the North West Persian Gulf. The aim of this study is to identify hidden structural patterns on bed the Persian Gulf, as well as how they relate to the main structure of the region. The seismic and geophysical data was used to identify those elements. The results of this study include identifying new fa...
Abstract
This article is devoted to seismotectonic and seismicity study and also seismicity risk analysis of Bakhtiyari concrete dam (a region with an area about 100 km), located at North West of Dorud city. Seismotectonics and seismic hazard analysis, including basic research that must be done before building a dam. Since Bakhtiari dam crest elev...
Abstract: In this article for Behjatabad reservoir dam in northeast Qazvin province a seismic hazard assessment has been done. review of the tectonic seismic studies include identify and introduction the most important seismic sources causing earthquakes, evaluation of seismic background and provide maximum ground motion parameters in dam for Retro...
گسل شمال شاهرود یکی از پهنه های اصلی گسلی البرز شرقی می باشد که که بدلیل فعال بودن، پیچیدگی های ساختاری شدیدی را در این منطقه تشکیل داده است. با مطالعه و تجزیه و تحلیل تصاویر ماهواره ای و همچنین استفاده از محیط GIS ، جابجائی ها و عوامل مختلف تکتونیکی در این منطقه بررسی شده است. در مجموع با توجه به شواهد و وجود اشکال زمین ریخت شناسی پیچیده مانند سطو...
The Behjatabad dam area is located in Qazvin province and 65 km away from the Abyek city to the North West direction. The Earthquakes occurred in this area are shallow and often have superficial fissures. This paper studies the seismic risk analysis using new techniques and compare them with each other are done. In this paper, try to be specific fe...
Awareness of seismicity is the earliest requirement in the seismic design of Dam constructions. This article is devoted to studying on Seismotectonic, seismicity and probabilistic seismic hazard analysis (PSHA) of the Baychebaq reservoir dam. These studies involve detecting seismic sources and assessing seismicity parameters. According to the studi...
57 ﻣﺘﺮ ﺑﺎﺷﺪ ﻣﯽ ﮐﻪ ﺑﺮاي ﮐﻨﺘﺮل ﺳﯿﻼب ﻫﺎ و ﮐﻤـﮏ ﺑﻪ ﮐﺸﺎورزي ﻣﻨﻄﻘﻪ آﺑﯿﮏ اﺳﺘﺎن در ﻗﺰوﯾﻦ روي ﺑﺮ رودﺧﺎﻧﻪ آﺑـﺎد ﺑﻬﺠﺖ اﺣـﺪاث ﺧﻮاﻫـﺪ ﮔﺮدﯾـﺪ . ﻧﺘـﺎﯾﺞ ﺣﺎﺻـﻞ ازﻣﻄﺎﻟﻌﺎت زﻣﯿﻨﺴﺎﺧﺖ ﻟﺮزه ﺷﺎﻣﻞ ﺷﻨﺎﺳﺎﯾﯽ و ﻣﻌﺮﻓﯽ ﻣﻬﻢ ﺗﺮﯾﻦ ﭼﺸﻤﻪ ﻫﺎي ﻟﺮزه ،زا ﺑﺮرﺳﯽ ﭘﯿﺸﯿﻨﮥ ﻟﺮزه ﺧﯿـﺰي و اراﺋﻪ ﺑﯿﺸﯿﻨﮥ ﻣ...
Probabilistic seismic hazard assessment (PSHA) were developed for Behjatabad Dam Site, using the best available geologic data and the latest state of the ground motion attenuation relationships. The result shows the peak ground acceleration and spectral acceleration at 0.2 seconds and one second for firm rock site conditions at two hazard levels, g...
The Harirud fault is one of the biggest faults of Middle-East and continues of this fault in Iran is known as Daruneh (Great Kavir) fault that in fact have a more than 1300 kilometer total length in Iran and Afghanistan. In this study with the processing satellite images and remote sensing techniques we had trying to investigate trending and mechan...
Questions
Questions (5)
Dear Researchers,
Disaggregation of Probabilistic Seismic Hazard Assessment (PSHA) is commonly employed to estimate the most likely magnitude and distance values (M - R) contributing to the hazard at the site study.
We are looking forward to a methodology to create a "Geographic deaggregation of seismic hazard" from magnitude distance deaggregation.
Prof.Harmsen already researched it. Unfortunately, there is no data available.
A fault-based azimuth direction may be helpful in this case. I'm asking you to share any ideas.
Best
Hadi
Dear researchers,
I'm looking for a laboratory for dating soil samples (The Holocene period).
Explanation:
I'm working on a paleo climatological theory about evidence of the Largest Lake in world History. Paleo mega Lake of Rey (#PAMELA) during the Holocene has covered central Iran. This study contains several fields of science such as Paleoclimatology, Geoarchaeology, Tectonic, Geology, and Paleogeomorphology. At this step, we need dating data to correlate the paleo shorelines around the area. The budget is limited so the joint paper may be the solution. Please let me know if anyone is interested.
Best
Related papers:
I'm looking for a methodology for sampling from a lake's base. The aim is C14 dating. Is there any standard method?
During the last decade, a theory about the largest lake in world history has grown stronger. The sample dating, field studies, and paleo climatological model are the most important part of the future articles. I'm looking for dating support to improve my last work (below links).
Abstract:
This study presents evidence for the existence of a vast and ancient lake that occupied a large area of central Iran during the Holocene. The northwestern fringe of the lake, located in the southeast of Tehran, was chosen as the study area. Remains of a Paleo Lake scarp was studied using aerial photographs, Quick Bird satellite imagery, and topographic maps. Furthermore, archeological sites within the region were identified and located, and evidence for the lake was obtained through correlation of these data. Eight shorelines were identified between 1100 – 950 m above sea level, with a depth of 3 – 15 m, and a 43 km in length. The results indicated that the active Quaternary faults named North Rey, Kahrizak, and South Rey are in fact the three main topographic levels of the paleo lake and from now on they cannot be considered as the faults. Soil granulation and thin sections showed the presence of non-compacted lake sediments. Results revealed a remarkable association between the location of ancient settlements and altitude of the identified paleo shorelines. All settlements older than 5,000 years were located at 1,000 m. Certainly, the past climate of this region was very different from its contemporary one. Dating studies will provide valuable information about the exact age of the Paleo -Lake and paleo climate changes.
Links:
What if we are able to determine a multi-layer gridded seismic source?
- @Ez-frisk software uses the gridded seismic source for seismic hazard assessment. This kind of source has a limitation for depth. In some tectonic regimes, the nature of the earth's crust shows us more than one seismogenic layer. How can this phenomenon be included in seismic hazard analysis?
