Alexandru Mărmureanu
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View article: Using the EMFIT Sensor in Geophysical Monitoring
Using the EMFIT Sensor in Geophysical Monitoring Open
EMFIT, also referred to as EMFi, is a ferroelectret film related to polyvinylidene fluoride (PVDF) sensors. It is an electroactive polymer (EAP) based on a polyolefin structure and consists of three layers of polyester film. Its applicatio…
View article: Evolution of the Seismic Forecast System Implemented for the Vrancea Area (Romania)
Evolution of the Seismic Forecast System Implemented for the Vrancea Area (Romania) Open
The National Institute of Earth Physics (NIEP) in Romania has upgraded its seismic monitoring stations into multifunctional platforms equipped with advanced devices for measuring gas emissions, magnetic fields, telluric fields, solar radia…
View article: The Development of the Seismic Forecasting System for the Vrancea AreaThe Development of the Seismic Forecasting System for the Vrancea Area
The Development of the Seismic Forecasting System for the Vrancea AreaThe Development of the Seismic Forecasting System for the Vrancea Area Open
The NIEP (National Institute of Earth Physics) monitors and analyzes seismicity in Romania. Over time, the monitoring stations equipped with seismic equipment have become multifunctional with new devices for measuring gas emissions, the ma…
View article: Attempts to include geomagnetic anomalies into the existing Romanian Operational Earthquake Forecast
Attempts to include geomagnetic anomalies into the existing Romanian Operational Earthquake Forecast Open
Our study analyzes the possibility to include geophysical parameters in the existing OEF (Operational Earthquake Forecasting) application based on the geochemical detected anomalies correlated with short-term changes in seismicity rates an…
View article: The Results and Developments of the Radon Monitoring Network in Seismic Areas
The Results and Developments of the Radon Monitoring Network in Seismic Areas Open
The analysis of the relationship between radon and seismicity was previously carried out in the seismic zone of Vrancea (Romania), positioning the measuring stations on tectonic faults. This article analyzed the evolution of radon under co…
View article: The results and developments of the radon monitoring network in seismic areas
The results and developments of the radon monitoring network in seismic areas Open
The analysis of the radon-seismicity relationship has been carried out so far in the Vrancea (Ro-mania) seismic zone, with monitoring stations positioned on tectonic faults. The article analyzes the evolution of radon under the conditions …
View article: Stress field in NW Galati seismotectonic area (Romania): insights from the inversion of earthquake focal mechanisms
Stress field in NW Galati seismotectonic area (Romania): insights from the inversion of earthquake focal mechanisms Open
An intense and unusually seismic activity, occurred during September-October 2013, in Galati-Izvoarele region, situated in the central-eastern part of Romania, between two main crustal faults, Sf. Gheorghe and Peceneaga Camena fault. With …
View article: Stress field evaluation in the earthquake-prone crustal zones of Romania, based on a comprehensive and updated focal mechanisms catalog
Stress field evaluation in the earthquake-prone crustal zones of Romania, based on a comprehensive and updated focal mechanisms catalog Open
Seismic activity in Romania encounters a variety of tectonic domains, from crustal earthquakes, which occur along active faults, to intermediate-depth seismicity that extends down to 200 km depth and which is limited in a small subcrustal …
View article: Strong ground motion parameters of the ML 5.2 and ML 5.7 crustal earthquakes in Gorj, Romania
Strong ground motion parameters of the ML 5.2 and ML 5.7 crustal earthquakes in Gorj, Romania Open
This preliminary report presents the main ground motion parameters (GMP) for engineering applications: Acceleration, Velocity, Displacement, PGA, PGV, PGD, SA, SV, SD and Fourier Spectra.
View article: Strong ground motion parameters of the ML 5.2 and ML 5.7 crustal earthquakes in Gorj, Romania
Strong ground motion parameters of the ML 5.2 and ML 5.7 crustal earthquakes in Gorj, Romania Open
This preliminary report presents the main ground motion parameters (GMP) for engineering applications: Acceleration, Velocity, Displacement, PGA, PGV, PGD, SA, SV, SD and Fourier Spectra.
View article: A switch from horizontal compression to vertical extension in the Vrancea slab explained by the volume reduction of serpentine dehydration
A switch from horizontal compression to vertical extension in the Vrancea slab explained by the volume reduction of serpentine dehydration Open
View article: Vrancea intermediate-depth focal mechanism catalog: a useful instrument for local and regional stress field estimation
Vrancea intermediate-depth focal mechanism catalog: a useful instrument for local and regional stress field estimation Open
The Vrancea seismic zone, located in the bend region of the South-Eastern Carpathians, is a unique area with both crustal and intermediate-depth seismic activity and is known as one of the most active seismic area in Europe. Moderate crust…
View article: The Near Fault Observatory community in Europe: a new resource for faulting and hazard studies
The Near Fault Observatory community in Europe: a new resource for faulting and hazard studies Open
The Near Fault Observatories (NFOs) community is one of the European Plate Observing System (EPOS, http://www.epos-eu.org) Thematic Communities, today consisting of six research infrastructures that operate in regions characterised by high…
View article: Extension of the radon monitoring network in seismic areas in Romania
Extension of the radon monitoring network in seismic areas in Romania Open
<p>The Romanian National Institute of Earth Physics (NIEP) developed a radon monitoring network mainly for Vrancea seismic are characterized by deep earthquakes (a rectangle zone in longitude/ latitude 25.05<sup>0</sup>/ …
View article: Dehydration-induced earthquakes and apparent slab pull in a subducted oceanic slab beneath Vrancea, Romania
Dehydration-induced earthquakes and apparent slab pull in a subducted oceanic slab beneath Vrancea, Romania Open
<p>Vrancea, Eastern Romania, presents a significant intermediate-depth seismicity, between 60 and 170 km depth, i.e. pressures from 2 to 6.5 GPa. A debate has been lasting for decades regarding the nature of the seismic volu…
View article: Studies for development of a system for rapid localization of the guns position in firing fields
Studies for development of a system for rapid localization of the guns position in firing fields Open
<p>Infrasound waves are generated by large range of natural and anthropogenic sources. Natural sources include earthquakes, volcanic eruptions, bolides, storms and lightning, tornadoes, avalanches, tsunamis. Anthropogenic sources con…
View article: Implementation of a Radon Monitoring Network in a Seismic Area
Implementation of a Radon Monitoring Network in a Seismic Area Open
Large-scale radon monitoring is carried out due to the fact that it is directly responsible for public health. European Directive 2013/59/EURATOM has been transposed into the legislation of several countries and provides for the need for l…
View article: Tectonic stress patterns along the Vrancea subcrustal zone from the inversion of focal mechanisms data
Tectonic stress patterns along the Vrancea subcrustal zone from the inversion of focal mechanisms data Open
<p>The Vrancea zone is an unique area with both crustal and intermediate-depth seismic activity and constitutes one of the most active seismic area in Europe.  An intense and persistent seismicity is generated between 60 and…
View article: From National to Transnational Seismic Monitoring Products and Services in the Republic of Bulgaria, Republic of Moldova, Romania, and Ukraine
From National to Transnational Seismic Monitoring Products and Services in the Republic of Bulgaria, Republic of Moldova, Romania, and Ukraine Open
The aim of this article is to analyze the background, current status, and outlook of seismic monitoring products and services in Bulgaria, Moldova, Romania, and Ukraine. These countries manage seismic networks that contribute to the Europe…
View article: Monitoring of Gas Emissions in Light of an OEF Application
Monitoring of Gas Emissions in Light of an OEF Application Open
This study analyzes the possibility to use geophysical and geochemical parameters in an OEF (Operational Earthquake Forecasting) application correlated with short-term changes in seismicity rates using a magnitude–frequency relationship. T…
View article: Complex system for earthquakes forecast using gas emission observations
Complex system for earthquakes forecast using gas emission observations Open
<p>Romanian National Institute of Earth Physics (NIEP) develops a gas emission monitoring network as part of a multidisciplinary activity. The goal is to help organizations specialized in emergency situations with short-term earthqua…
View article: Larger peak ground accelerations in extra-Carpathian area than in epicenter
Larger peak ground accelerations in extra-Carpathian area than in epicenter Open
<p>Devasting ― and, in some sense, unforeseen  ―  earthquakes in Nepal, Sumatra, Haiti, Japan  and elsewhere have triggered a heated debate about the legitimity and limitations of probab…
View article: Evaluation of the Solar Radiation in a Seismic Zone
Evaluation of the Solar Radiation in a Seismic Zone Open
The solar radiation affects the life on Earth and it is important in meteorology, climatology, solar energy, agriculture, hydrology and seismology, too. The Sun warms the earth which reflects a part of the energy. An effect of tectonic str…
View article: Short-term earthquakes forecast based on multi-parametric observations
Short-term earthquakes forecast based on multi-parametric observations Open
View article: PRECURSOR PHENOMENOS IN A VRANCEA ZONE
PRECURSOR PHENOMENOS IN A VRANCEA ZONE Open
View article: Fast Moment Magnitude Determination from P-wave Trains for Bucharest Rapid Early Warning System (BREWS)
Fast Moment Magnitude Determination from P-wave Trains for Bucharest Rapid Early Warning System (BREWS) Open
Bucharest, with a population of approximately 2 million people, has suffered damage from earthquakes in the Vrancea seismic zone, which is located about 170 km from Bucharest, at a depth of 80–200 km. Consequently, an earthquake early warn…
View article: A STUDY ON THE DETERMINATION OF CUMULATIVE ABSOLUTE VELOCITY (CAV) THRESHOLD LEVELS FOR VRANCEA EARTHQUAKES
A STUDY ON THE DETERMINATION OF CUMULATIVE ABSOLUTE VELOCITY (CAV) THRESHOLD LEVELS FOR VRANCEA EARTHQUAKES Open
Natural disasters from earthquakes can cause considerable damages, with potentially severe effects to urban environment.Last strong Vrancea earthquake on March 4, 1977 (Mw=7.4,depth=95km); tens of thousands of buildings damaged, many peopl…
View article: Near Fault Observatories: multidisciplinary research infrastructures, high resolution data and scientific products available through dedicated services implemented within the EPOS-IP project
Near Fault Observatories: multidisciplinary research infrastructures, high resolution data and scientific products available through dedicated services implemented within the EPOS-IP project Open
View article: State-of-the art and future of earthquake early warning in the European region
State-of-the art and future of earthquake early warning in the European region Open
View article: Bridging the Gap Between Nonlinear Seismology as Reality and Earthquake Engineering
Bridging the Gap Between Nonlinear Seismology as Reality and Earthquake Engineering Open
In seismic hazard evaluation and risk mitigation, there are many random and epistemic uncertainties. On the another hand, the researches in this area as part of knowledge are with rest, that is, the results are with interpretable questions…