Volume 34 (2024)
Volume 33 (2023)
Volume 32 (2022)
Volume 31 (2021)
Volume 30 (2020)
Volume 29 (2020)
Volume 28 (2019)
Volume 27 (2018)
Volume 26 (2017)
Volume 25 (2016)
Volume 24 (2015)
Volume 23 (2014)
Volume 22 (2013)
Volume 21 (2012)
Volume 20 (2011)
Volume 19 (2010)
Volume 18 (2009)
Volume 17 (2008)
Volume 16 (2007)
Determination of appropriate location for VLBI station establishing in the Middle East to reduce error of EOPs in CONT17 campaign

Asghar Rastbood; Mohsen Sahebi-Ilekhchi

Volume 33, Issue 1 , February 2023, , Pages 55-68


  Very Long Baseline Interferometry (VLBI) is one of the essential approaches in geodesy. Significant capabilities of this technique are creation of International Celestial Reference Frame (ICRF), determination of Earth orientation parameters (EOPs), coordinates of station with high accuracy and light ...  Read More

Investigation of Smooth and Block Inversion Characteristics of Electrical Resistivity Data

Reza Ghanati; Zahra Tafaghod Khabaz

Volume 32, Issue 4 , December 2022, , Pages 395-410


  Inversion modeling of Vertical Electrical Sounding (VES) data is formulated as a nonlinear problem and solved using multiple depth layers of fixed boundary and a few depth layers of the variable boundary. The model parameters in Smooth inversion are only the resistivity values. However, in the block ...  Read More

Fast Earthquake Relocation Using ANFIS Neuro-Fuzzy Network Trained Based on the Double Difference Method

Hamidreza Samadi; Roohollah Kimiaefar; Alireza Hajian

Volume 32, Issue 3 , September 2022, , Pages 93-102


  One of the most important issues in seismology is to accurately determine the epicenter of earthquake, mainly because the accuracy of dependent studies such as seismic risk analysis, fault mechanism, depends on the accuracy of mentioned parameter. Double difference method is one of the conventional relative ...  Read More

The Superiority of the Third-order Moving Average Method over the Second-order Moving Average Method for Estimating the Shape and Depth of Buried Magnetic Anomalies

Mohammad Fouladi; Mirsattar Meshinchi Asl Meshinchi Asl; Mahmoud Mehramuz; Nima Nezafati

Volume 32, Issue 2 , July 2022, , Pages 31-44


  Geophysical methods have been developed to study the particulars of physically diffusible fields in the ground. In geophysical studies, the goal is usually to detect inhomogeneities inside the earth using physical values measured at the earth's surface. Geophysicists attempt to reconstruct the Earth's ...  Read More

Inverse modeling and interpretation of magnetic and geoelectric data in the epithermal gold index of Kuh-e Lakht

Ghazal Janghorban; Seyed Mohammad Abtahi Forooshani; Keytash Moshtaghian; Hooshang Asadi Harooni; Hamzeh Sadeghi Sorkhani; Mohammad Hajheidari

Volume 32, Issue 2 , July 2022, , Pages 121-132


  Kuh-e Lakht epithermal gold index is located on Urumieh-Dokhtar Volcanic Belt in Isfahan province. Geological studies indicate the presence of an epithermal gold mineralization system in the area.  The geophysical exploration in the area includes magnetometry, resistivity, and induced polarization ...  Read More

Assessment of the physical variations)heat and salinity) of climate changes in the Persian Gulf Field data and Numerical Simulation

safieh farrokhi mogaddam; Abbas Alli Alli akbari bidokhti; Farhang Ahmadi givi; Mojtaba Ezam

Volume 31, Issue 1 , June 2021, , Pages 63-70


  Salinity and water temperature are considered as important characteristics of water of different seas. The absolute values and variability of them in time and space determine life sustainability conditions, development of plants and animals and also types of human activity in seas. Water temperature ...  Read More

Regional-residual anomalies and noise separation from gravity field using singular value decomposition method

Ata Eshaghzadeh; Alireza Hajian; Roghayeh Alsadat kalantari

Volume 30, Issue 117 , December 2020, , Pages 155-162


  Potential field data is the assembled of effects of all underground sources. Computing regional-residual anomaly is a critical step in modeling and inversion in the gravity method. Existence quantitative noise in corrected gravity data is unavoidable. In this paper, we present a novel separation method ...  Read More

Seismicity of East Alborz based on accurate earthquake relocation during two decades seismic data

Vahid Maleki; mohammad reza Hatami; Ali Asghar Mottaghi

Volume 29, Issue 116 , August 2020, , Pages 111-120


  In this study, we investigate the seismicity of eastern Alborz based on precise location of the earthquakes during the last two decades. In order to reduce the effect of outliers and low quality data on earthquake location results, during phase reading, weighing has been done. Manual readings of seismic ...  Read More

Assessment of groundwater potential in Zanjanrood catchment area using spatial analysis ‎and geoelectrical investigations

Marzie Shabani; Abolfazl Rezaei; Zohre Masoumi

Volume 29, Issue 116 , August 2020, , Pages 287-294


  The water table in the Zanjanrood catchment has severely declined recently. Therefore, determination of the groundwater potential zoning map is of great importance for optimal management of water resources. Here, we used seven effective criteria including lithology, slope, drainage, lineament, rainfall, ...  Read More

Separation of Intrinsic and Scattering Attenuation in North-West of Iranian pleateau

Mojtaba Naghavi; Habib Rahimi; Ali Moradi

Volume 29, Issue 114 , December 2019, , Pages 25-34


  In this study, we have used recorded local earthquakes by 17 permanet seismic stations to separate intrinsic and scattering attenuation in North-West of Iranian pleateau. Intrinsic and scattering attenuation can be applied as useful tools to study the geodynamic and tectonic characteristics of a region. ...  Read More

Estimation of shear wave quality factor in the region of the 2012 Ahar-Varzaghan twin earthquakes using aftershock data

Jafar Jaghouri; Hossein sadeghi; Sayyed Keivan Hosseini

Volume 29, Issue 114 , December 2019, , Pages 123-128


  The shear wave quality factor is one of the key parameters for earthquake and engineering seismology studies. In the present study, this factor was investigated in the region of the 2012 Ahar-Varzaghan twin earthquakes. We used a generalized inverse method based on the shear wave windows of the aftershocks ...  Read More

InSAR Time series Analysis of Interseismic deformation of Eastern part of Iran

zahra hajeb; zahra mousavi; zohreh masoumi; Abolfazl Rezaei

Volume 29, Issue 114 , December 2019, , Pages 251-258


  The arid and semi-arid climate with a low rainfall along with the population growth has been lead to overexertion from groundwater resources over recent two decades in Iran. This over-extraction has been led to the significant groundwater depletion and water level decline in most parts of Iran as well ...  Read More

Basement Seismicity in the Lurestan Arc of Zagros

Mohammadreza Jamalreyhani; Abdolreza Ghods; Seyyed Khalil Mottaghi; Esmail Shabanian; Morteza Talebian; Beijing Chen

Volume 29, Issue 113 , November 2019, , Pages 13-24


  One of the main issues in Zagros is the extent that basement and the thick sedimentary layer participate in the observed seismicity. During Nov. 2013, five magnitude ~5 Mw events hit a region in the western end of Lurestan arc of Simply Folded Belt (SFB) of Zagros. We used the Iran-China temporary network ...  Read More

Crustal velocity structure and Moho discontinuity depth beneath center of Iran

Afsaneh Nasrabadi; Fateme Azimi; MohammadReza Sepahvand

Volume 28, Issue 111 , May 2019, , Pages 43-52


  Crustal velocity structure and Moho discontinuity depth have investigated beneath 7 the broadband seismic stations, AFRZ, TKDS, TPRV, TNSJ, ANAR, KRSH of the Iranian Seismological Center (ISC) and YZKH of Iranian National Seismic Network (INSN) located in the center of Iran by joint inversion of receiver ...  Read More

Evaluation of shallow structure of Qeshm Island by two Dimensional Rayleigh wave tomography using aftershocks of 27 Nov. 2005

Abbas Gholamzadeh; Nasim Haydarpoor

Volume 28, Issue 110 , December 2018, , Pages 109-118


  The main purpose of this paper is studying sedimentary layer in the Qeshm Island. We use aftershocks of 27 Nov. 2005 Qeshm Island (Mb=6.0), to perfume 2D tomography of Rayleigh waves. We have analyzed surface wave data for 856 aftershocks, consist 9821 waveforms. The dispersion curves are calculated ...  Read More

Investigation of stress and strain rate variations in the Central Alborz by using earthquake focal mechanisms and GPS velocity vector data

Shahrokh Pourbeyranvand; Mohammad Tatar

Volume 27, Issue 108 , September 2018, , Pages 57-66


  The Alborz, as one of the important seismotectonic provinces in Iran, has a great vulnerability from natural disasters, especially seismic risk point of view, because of the existence of Tehran megacity in its southern edge. The importance of this area has caused a relatively dense GPS network around ...  Read More

Depth estimation of total magnetic anomalies using Hilbert transform with 3-D analytic signal application, case study: iron ore Kheirabad, Sirjan, Iran

mohammad rasool nikbakhsh; Mir Sattar Meshinchi Asl; Hamidreza Siyahkohi; Mohsen Oveisy Moakhar

Volume 27, Issue 108 , September 2018, , Pages 145-154


  An important goal in mining exploration is  the estimation of the depth and the thickness of the causative source. According to this simplification, several methods have been developed for interpreting magnetic field anomalies. In this article, the Hilbert transform has been used to calculate the ...  Read More

Imaging karst aquifers by combining deep electrical resistivity tomography with magnetic surveys, a case study of the Quchan area, NE Iran

Ali Ramzani; Mir Sattar Meshinchi Asl; Mohsen Oveisy Moakhar

Volume 28, Issue 109 , September 2018, , Pages 265-272


  Geophysical surveys have been carried out to characterize the structure and to better understand the karstic water reservoirs in the Quchan area. Deep 2-D resistivity tomography and magnetic method have been used to detect the most promising zones for new water-well siting. Magnetic method has a common ...  Read More

Weight induced-stress of the Gotvand-e Olya reservoir on the Golestan Fault

Mohammad Reza Ebrahimi; Mohammad Tatar

Volume 27, Issue 107 , June 2018, , Pages 193-202


  Impoundment of a reservoir and changes in the lake levels can trigger / induce the seismicity. In this research, the strength changes are modeled across the Golestan fault, due to loading effect of Gotvand-e Olya reservoir which is located in the Zagros Mountain of SW Iran. The formulas based on 3D Boussinesq ...  Read More