This document summarizes a study on environmental monitoring of soil radon in a seismically active area of South West Greece. Researchers set up a radon monitoring station to investigate links between soil radon anomalies and earthquakes. Notable radon disorders were detected in 2008, 2-3 months before a magnitude 6.5 earthquake. Spectral analysis found fractal behavior and low frequency enhancement in radon levels prior to the quake. While radon changes did not correlate with environmental parameters, the anomalies may be explained by an asperity model of heterogeneous medium fracture. Further multivariate analysis of radon anomalies could strengthen understanding of earthquake precursors.
Microseismic monitoring at the CCS fields - what we learnt from NagaokaGlobal CCS Institute
Dr Ziqiu Xue, Chief Researcher of the CO2 Storage Group at Japan’s Research Institute of Innovative Technology for the Earth (RITE) will lead a Global CCS Institute webinar to review and discuss microseismic monitoring at CCS storage sites.
The secure storage of carbon dioxide (CO2) in deep geological formations requires a sufficient overlying cap rock layer to contain the CO2 within the formation. Injection of CO2 increases the formation pressure in the target reservoir. This will decrease the effective pressure and will also lead to geomechanical deformation of the rocks. Therefore, to ensure safety of storage, the CO2 injection must be controlled to maintain integrity of the cap rock.
This webinar will give a simple review on microseismic monitoring results observed at onshore CO2 injection sites such as Weyburn, Canada and Lacq, France. Case study results from the Nagaoka pilot site in Japan will also be introduced, including the field survey results after an earthquake hit the area during CO2 injection.
Natural Radioactivity Measurements of Basalt Rocks in Aden governorate, South...IOSR Journals
The amounts of radioactivity in the igneous rocks have been investigated; 63 basalt rock samples were collected from Aden governorate, South of Yemen. The activity concentration of 226Ra, 232Th and 40K were measured using NaI (TI) detector. Along the study area the radium equivalent activities Raeq in Bq/Kg of samples under investigation were found in the range of 51.60to 809.26Bq/Kg with an average value of 237.01Bq/Kg, this value is below the internationally accepted value of 370 Bq/Kg. To estimate the health effects of this natural radioactive composition, the average values of absorbed gamma dose rate D (55 nGyh-1), Indoor and outdoor annual effective dose rates Eied (0.11 mSvy-1), and Eoed (0.03 mSvy-1), External hazard index Hex(0.138) and internal hazard index Hin (0.154), and representative level index Iγr(0.386) have been calculated and found to be higher than the worldwide average values.
Microseismic monitoring at the CCS fields - what we learnt from NagaokaGlobal CCS Institute
Dr Ziqiu Xue, Chief Researcher of the CO2 Storage Group at Japan’s Research Institute of Innovative Technology for the Earth (RITE) will lead a Global CCS Institute webinar to review and discuss microseismic monitoring at CCS storage sites.
The secure storage of carbon dioxide (CO2) in deep geological formations requires a sufficient overlying cap rock layer to contain the CO2 within the formation. Injection of CO2 increases the formation pressure in the target reservoir. This will decrease the effective pressure and will also lead to geomechanical deformation of the rocks. Therefore, to ensure safety of storage, the CO2 injection must be controlled to maintain integrity of the cap rock.
This webinar will give a simple review on microseismic monitoring results observed at onshore CO2 injection sites such as Weyburn, Canada and Lacq, France. Case study results from the Nagaoka pilot site in Japan will also be introduced, including the field survey results after an earthquake hit the area during CO2 injection.
Natural Radioactivity Measurements of Basalt Rocks in Aden governorate, South...IOSR Journals
The amounts of radioactivity in the igneous rocks have been investigated; 63 basalt rock samples were collected from Aden governorate, South of Yemen. The activity concentration of 226Ra, 232Th and 40K were measured using NaI (TI) detector. Along the study area the radium equivalent activities Raeq in Bq/Kg of samples under investigation were found in the range of 51.60to 809.26Bq/Kg with an average value of 237.01Bq/Kg, this value is below the internationally accepted value of 370 Bq/Kg. To estimate the health effects of this natural radioactive composition, the average values of absorbed gamma dose rate D (55 nGyh-1), Indoor and outdoor annual effective dose rates Eied (0.11 mSvy-1), and Eoed (0.03 mSvy-1), External hazard index Hex(0.138) and internal hazard index Hin (0.154), and representative level index Iγr(0.386) have been calculated and found to be higher than the worldwide average values.
Assessment of Activity Concentration of The Naturally Occurring Radioactive M...IOSR Journals
The activity concentrations of potassium, Radium and thorium in soil samples from a mining site in yankandutse, Kaduna north western Nigeria were measured using gamma ray spectroscopy method. Activity concentration of potassium, Radium and thorium were determined. The activity concentrations of 40K, 226Ra and 232Th, respectively in Bq kg-1 in the soil samples ranged as follows: K-40 196.11±2.02 to 553.03±1.08 with average of 382.01, Ra-226 .1506±.03 to 5.67±.03 with average of 2.08 and Th-232 18.13±3.19 to 73.09±1.59 with average activity concentrations of 47.23 .The mean activity concentration of potassium and radium are below average but for thorium the activity concentration is above average.
Similarities in the self organised critical characteristics between radon and...Anax Fotopoulos
Abstract
This paper addresses issues of self-organised-critical behaviour of soil-radon and MHz-electromagnetic disorders during intense seismic activity in SW Greece. A significant radon signal is re-analysed for environmental influences with FFT and multivariate statistics. Self-organisation of signals is investigated via fractal evolving techniques and detrended fluctuation analysis. New lengthy radon data are presented and analysed accordingly. These did not present self-similarities. Similar analysis applied to new important concurrent MHz-electromagnetic signals revealed analogous behaviour to radon. The signals precursory value is discussed.
Assessment of Activity Concentration of The Naturally Occurring Radioactive M...IOSR Journals
The activity concentrations of potassium, Radium and thorium in soil samples from a mining site in yankandutse, Kaduna north western Nigeria were measured using gamma ray spectroscopy method. Activity concentration of potassium, Radium and thorium were determined. The activity concentrations of 40K, 226Ra and 232Th, respectively in Bq kg-1 in the soil samples ranged as follows: K-40 196.11±2.02 to 553.03±1.08 with average of 382.01, Ra-226 .1506±.03 to 5.67±.03 with average of 2.08 and Th-232 18.13±3.19 to 73.09±1.59 with average activity concentrations of 47.23 .The mean activity concentration of potassium and radium are below average but for thorium the activity concentration is above average.
Similarities in the self organised critical characteristics between radon and...Anax Fotopoulos
Abstract
This paper addresses issues of self-organised-critical behaviour of soil-radon and MHz-electromagnetic disorders during intense seismic activity in SW Greece. A significant radon signal is re-analysed for environmental influences with FFT and multivariate statistics. Self-organisation of signals is investigated via fractal evolving techniques and detrended fluctuation analysis. New lengthy radon data are presented and analysed accordingly. These did not present self-similarities. Similar analysis applied to new important concurrent MHz-electromagnetic signals revealed analogous behaviour to radon. The signals precursory value is discussed.
Geo Environmental Investigation of Abuad Dumpsite, Southwestern NigeriaIJERA Editor
Geoenvironmental study of ABUAD female dumpsite was conducted to investigate the suitability of its location
and potential impact on groundwater in the environment. Profiling and Vertical electrical sounding methods
were employed using Dipole - Dipole and Schlumberger configuration respectively. Five points were sounded
and one profile was occupied. Three heterogeneous subsurface lithologic units were established namely; lateritic
topsoil, clayey-sand, and, fresh basement. The curve types are simple H and HA. The topsoil and clayey-sand
materials are characterized with relatively low resistivity values while the fresh basement materials are
characterized with high resistivity values. The average resistivity and thickness values for the topsoil are
280.0Ωm and.2.3m respectively. Clayey-sand was encountered in all the locations with average resistivity and
thickness values of 32.0Ωm and 7.3m respectively. Basement is relatively shallow in the study area, it was
encountered in all the locations with an average resistivity and depth values to the top of basement of 674Ωm,
and 9.6m respectively. Overburden materials are relatively thin within the area with an average resistivity and
thickness values of 156Ωm, and 9.6m respectively. The overburden materials constituting the aquiferous units
within the study area are porous, vulnerable, and good paths for leachate migration. The relatively low
resistivity values within the clayey-sand layers (14 - 61Ωm) are suggestive of leachate intrusion, while relatively
high resistivity values of the impervious basement are due to their crystalline nature. The proximity of the
dumpsite to both the cafeteria and residential halls is a cause for concern.
Lithological Investigation at Tombia and Opolo Using Vertical Electrical Soun...IJLT EMAS
Vertical electrical soundings (VES) was carried out in Opolo and Tombia all in Yenagoa local government area, Bayelsa state, Nigeria to understand the resistivity distribution of its subsurface which serves as a tool in investigating subsurface lithology. All VES sounding were stacked together to generate 1D pseudo tomogram and was subsequently interpreted. The interpreted VES curve results shows that Opolo consists of three layers within the depth of investigation. Sandy clay with mixture of silt make up the first layer (Top layer) with resistance value ranging from 24-63Ωm. The second layer is made up of thick clay with very low resistivity values ranging from 3-19Ωm. The third layer is sandyclay with its resistance value ranging from 26-727Ωm.Tombia also reveals that the area is in three layers within the depth of investigation. Sandy clay with a mixture of fine sand made up the first layer (Top soil) with its resistance values ranging from 40-1194Ωm. The second layer is made up of fine sand with resistivity value ranging from 475-5285Ωm. The third layer is made up of sandy clay/sand with its resistance value ranging from 24-28943Ωm.The results of the 1D pseudo tomogram also reveals that Tombia and Opolo consists of three layers within the depth of investigation and pseudo tomograms serves as a basis tool for interpreting lithology and identifying lithological boundaries for the subsurface
Seismic Refraction Survey for Groundwater Potentials of Northern Paiko Area. ...iosrjce
This paper titled Seismic Refraction Survey for Groundwater Potentials of Southern Paiko Area.
Niger State, Nigeria, employs the service of seismic refraction survey method. A twelve-channel seistronix was
used for the data collection. The profiles were marked at 100 m intervals, while the profiles lines traversed
1000 m (1km). A Total of 44 spreads were shot. Data were collected, Time – distance (T-S) graphs were plotted
using matrix laboratory software, velocities of the underlying layers obtained and depths to the refractor layer
computed and geologic cross sections were obtained. The results obtained gave an overview of the lateral
variation in the lithological changes of the subsurface earth materials in the surveyed area. The basement
surface varied in depth, from 10.16 m to a maximum of 14.80 m. weathered layer velocities ranging from 809
m/s to 3612 m/s and consolidated layer velocities varying between 2858 m/s to 9696 m/s. Four shot points were
delineated as aquifer potentials of the area having depth to refractor varying between 13.70 m and 14.80 m with
overburden velocities ranging from 1940 m/s to 3462 m/s. The rock materials identified in the surveyed area are
chiefly sand, saturated clay, gravel, gneiss, igneous rock and granite.
Tzitzikosta message for the world heritage monuments exhibitionAnax Fotopoulos
MESSAGE BY THE PRESIDENT OF THE HELLENIC NATIONAL COMMISSION FOR UNESCO EKATERINI TZITZIKOSTA OPENING OF THE PHOTOGRAPHIC EXHIBITION OF THE UNESCO WORLD HERITAGE SITES.
Architecture of the human regulatory network derived from encode dataAnax Fotopoulos
Transcription factors bind in a combinatorial fashion to specify the on-and-off states of genes; the ensemble of
these binding events forms a regulatory network, constituting the wiring diagram for a cell. To examine the
principles of the human transcriptional regulatory network, we determined the genomic binding information of
119 transcription-related factors in over 450 distinct experiments. We found the combinatorial, co-association of
transcription factors to be highly context specific: distinct combinations of factors bind at specific genomic locations.
In particular, there are significant differences in the binding proximal and distal to genes. We organized all the
transcription factor binding into a hierarchy and integrated it with other genomic information (for example,
microRNA regulation), forming a dense meta-network. Factors at different levels have different properties; for
instance, top-level transcription factors more strongly influence expression and middle-level ones co-regulate
targets to mitigate information-flow bottlenecks. Moreover, these co-regulations give rise to many enriched
network motifs (for example, noise-buffering feed-forward loops). Finally, more connected network components
are under stronger selection and exhibit a greater degree of allele-specific activity (that is, differential binding to the
two parental alleles). The regulatory information obtained in this study will be crucial for interpreting personal genome
sequences and understanding basic principles of human biology and disease.
The RET proto-oncogene encodes a receptor tyrosine kinase for members of the glial cell line-derived neurotrophic factor family of extracellular signalling molecules. RET loss of function mutations are associated with the development of Hirschsprung's disease, while gain of function mutations are associated with the development of various types of human cancer, including medullary thyroid carcinoma, multiple endocrine neoplasias type 2A and 2B, pheochromocytoma and parathyroid hyperplasia.
RET is an abbreviation for "rearranged during transfection", as the DNA sequence of this gene was originally found to be rearranged within a 3T3 fibroblast cell line following its transfection with DNA taken from human lymphoma cells. The human gene RET is localized to chromosome 10 (10q11.2) and contains 21 exons.
The natural alternative splicing of the RET gene results in the production of 3 different isoforms of the protein RET. RET51, RET43 and RET9 contain 51, 43 and 9 amino acids in their C-terminal tail respectively. The biological roles of isoforms RET51 and RET9 are the most well studied in-vivo as these are the most common isoforms in which RET occurs.
Common to each isoform is a domain structure. Each protein is divided into three domains: an N-terminal extracellular domain with four cadherin-like repeats and a cysteine-rich region, a hydrophobic transmembrane domain and a cytoplasmic tyrosine kinase domain, which is split by an insertion of 27 amino acids. Within the cytoplasmic tyrosine kinase domain, there are 16 tyrosines (Tyrs) in RET9 and 18 in RET51. Tyr1090 and Tyr1096 are present only in the RET51 isoform.
The extracellular domain of RET contains nine N-glycosylation sites. The fully glycosylated RET protein is reported to have a molecular weight of 170 kDa although it is not clear to which isoform this molecular weight relates.
From Smart Homes to Smart Cities: An approach based on Internet-of-ThingsAnax Fotopoulos
Several applications and services have been developed over the latest years for making houses smarter in terms of danger prevention, energy consumption, waste recycling, environmental monitoring and other life improvement implementations. Internet-of-Things (IoT) gave numerous possibilities decentralizing the control of smart homes. Numerous sensors and developed systems or services can all communicate via smart devices like smartphones. A continuously broaden interest arises from local and national authorities for the benefits of applying IoT strategies in whole cities. With main focus on energy and water consumption, cities can reduce significantly their costs and become environmentally and economically sustainable. In the transition from smart homes to smart cities serious challenges should be take into consideration including a human-centric approach and the beneficiary involvement of the citizens for local and national authorities. The design of an IoT strategy for smart cities is a multifaceted procedure which includes the study of economic, urban, demographic and geographical indicators. In this paper, empirical evidence from selected case studies are presented.
The social aspect of Smart Wearable Systems in the era of Internet-of-ThingsAnax Fotopoulos
Social networking (Web 2.0) changed the way of interaction and communication of humans-to-humans, companies-to-customers, universities-to-students and state-to-citizens. The movement from static web pages (Web 1.0) to social networking and the rapid growth of smart devices created a new need for more complex data-on-demand across multiple platforms and devices. Cloud computing, miniaturization of sensors and low energy wireless technologies offered adequate possibilities to measure and understand environmental, health, industrial and other indicators, delivered in smart devices or in the web. The skyrocketing proliferation of the bidirectional communication between sensors and smart devices created a new series of products bringing us to the era of Internet-of-Things (IoT). The ubiquitous computing (presumed as Web 3.0) states that computing will appear in any device and in any location. Smart Wearable Systems (SWS) constitute the latest effort of academia and industry to toward this direction, aiming to enhance the communication and the velocity between IoT applications, smart devices (smartphones, tablets & smart TVs) and social networks. In this paper an analysis over social aspects of SWS is performed. Recent reports show that IoT market will be bigger than the total market of smart devices and PCs combined, enlarging the overall interest.
Introduction to HMMER - A biosequence analysis tool with Hidden Markov Models Anax Fotopoulos
HMMER is used for searching sequence databases for homologs of protein sequences, and for making protein sequence alignments. It implements methods using probabilistic models called profile hidden Markov models (profile HMMs).
Compared to BLAST, FASTA, and other sequence alignment and database search tools based on older scoring methodology, HMMER aims to be significantly more accurate and more able to detect remote homologs because of the strength of its underlying mathematical models. In the past, this strength came at significant computational expense, but in the new HMMER3 project, HMMER is now essentially as fast as BLAST.
As part of this evolution in the HMMER software, we are committed to making the software available to as many scientists as possible. Earlier releases of HMMER were restricted to command line use. To make the software more accessible to the wide scientific community, we now provide servers that allow sequence searches to be performed interactively via the Web.
TIS prediction in human cDNAs with high accuracyAnax Fotopoulos
Correct identification of the Translation Initiation Start (TIS) in cDNA is an important issue for genome annotation. The aim of this work is to improve upon current methods and provide a performance guaranteed prediction.
Measuring the EMF of various widely used electronic devices and their possibl...
Environmental monitoring of soil radon in a very tectonic area in south west Greece
1. Environmental monitoring of
soil radon in a very tectonic
area in South West Greece
A. A. Fotopoulosb, E. Petrakia, E. M. Vlamakisb, X. A. Argyrioub,
N. N. Chatzisavvasb, T. J. Sevvosb, A. Zisosc, C. Nomicosd,
A. Louizie, J. Stonhama, P. H. Yannakopoulosb, D. Nikolopoulosc
aBrunel University, Dept. of Engineering and Design, UK
b Department of Computer Systems Engineering, Technological Educational Institute (TEI) of Piraeus, Greece
c Department of Physics, Chemistry and Material Science, Technological Educational Institute (TEI) of Piraeus, Greece
d Department of Electronics, Technological Educational Institution of Athens, Greece
e Medical Physics Department, Medical School, University of Athens, Greece
http://env-hum-comp-res.teipir.gr International Scientific Conference eRA-7
2. Objectives
Investigation of the usefulness of measuring soil
radon gas anomalies in a very active tectonic area in
South West Greece and possible linkage to
earthquakes
Set up of radon monitoring station
International Scientific Conference eRA-7
3. Introduction
Radon (222Rn) is a naturally occurring
radioactive noble gas. The presence of radon in
the environment is in rocks, soil, building
materials, underground and surface waters
(UNSCEAR 2000). Radon Measurement
Earth Crust
The stress–strain developed within the earth's
crust before an earthquake opens up various
pathways and leads to changes in gas
transportation from deep earth to surface
(Thomas, 1988).
Anomalies of radon concentrations impending
pre-earthquakes periods have been observed
in groundwater, thermal waters and soil gas
(Erees et al., 2007; Choubey et al., 2009;
Cicerone et al., 2009; Ghosh et al., 2009).
The above issues clearly indicate that radon
monitoring in soil could be very important
from geological point of view. Schematic cross section of the in groundwater basin
(Ulomov and Mavashev, 1971).
International Scientific Conference eRA-7
4. Seismicity in South West Greece 1/2
The study area of Ilia is
located in South West Greece
and is dominated by
extensional seismicity
structures.
These structures evoked
more than 600 earthquakes
of ML>4.0 in the last century
(http://labtect.geol.uoa.gr/pa
ges/fountoulis/esismol.htm).
International Scientific Conference eRA-7
5. Seismicity in South West Greece 2/2
Ilia is a part of a broad neotectonic
depression structure which is very close to
the convergent boundary between the
African and the European tectonic plates
and it’s close to the western part of the
Hellenic Trench.
A station for the surveillance of soil radon
has been installed in Kardamas
(Peloponnese, Ilia Prefecture, South West
Greece).
Prior research has shown that both active(Alpha Guard Unit) &
passive techniques (Solid State Nuclear Track Detectors) can be used
for the measurement of Soil Radon gas, with active techniques to be
more precise and quick (Nikolopoulos et. al., 2009).
International Scientific Conference eRA-7
6. Materials & Methods
Instrumentation (Active Technique)
• Soil gas is pumped at the
maximum available rate of 1 L/min
to maximize the quantity of the
pumped gas and to enhance the
detection efficiency.
• Radon was measured at the rate
of 1 measurement per 1
min(Nikolopoulos et al., 2012).
• Atmospheric pressure (AP),
relative humidity (RH) and
DATA temperature (T) are continuously
LOGGER monitored as well.
International Scientific Conference eRA-7
7. Materials & methods
spectral fractal analysis
During the complex process of earthquake preparation, linkages
between space and time produce characteristic fractal structures
(Smirnova and Hayakawa, 2007; Hayakawa and Hobara, 2010;
Eftaxias, 2010; Kapiris et. al., 2002; Contoyiannis et. al.,2005)
Power spectrum directly reflects the physical scales of the
processes that affect structure formation (Kapiris et al., 2003)
If the recorded time-series A(ti) is a temporal fractal then a power
law spectrum is expected, 𝑺 (𝒇 ) = 𝒂 ⋅ 𝒇−𝒃 where f is the
frequency of the transform, 𝑆 𝑓 the power spectral density and
b the linear spectral slope.
Spectral scaling exponent is a measure of the strength of time
correlations.
International Scientific Conference eRA-7
8. Background noise presents
Scalogram of the DWT 0<b(t)<1, moving from the the first
of the 2008 radon signal stage of general disorder to the
final stage of the earthquake
presenting stability and low self-
organisement.
For the power law spectrum
𝑺 (𝒇 )=𝒂⋅𝒇−𝒃
• The area between the two radon
spikes is very critical and presents
Time evolution of the fractal behaviour (b values above 1,5)
power-law-beta values • This low frequency enhancement
reveals the predominance of the
larger fracture events which is
considered as a footprint of the
preparation of earthquakes
(Eftaxias et al.,2009)
Anomalies detected in radon
concentrations in 2008 3 & 2
Levels of soil radon months before 6,5 Earthquake of
concentration in 2008 6/8/2008
International Scientific Conference eRA-7
9. Application of the Discrete Wavelet Transform
Radon concentration
during the five-day
disturbance of the first
radon spike in 2008
Log-log diagram of
S(f)=af-b versus frequency.
The enhancement of low
frequencies (low negative
logarithms) are
superimposed on the
Power Spectrum Density,
the log-log slope is
reduced and,
subsequently, the
calculated power-law b-
value and the Spearman
correlation coefficient.
International Scientific Conference eRA-7
10. Material & Methods
Environmental Parameters
It has been shown that the anomalies
of soil radon concentration
presented non-significant
cross-correlation
with the measured environmental
parameters: i) temperature ii) air-
pressure iii) relative humidity &
iv) precipitation.
(Nikolopoulos et. al., 2012)
International Scientific Conference eRA-7
11. Material & Methods
Asperity Model
From the various theoretical explanations of
the Radon anomalies the asperity model STAGE 1
(Eftaxias et al.,2008) tend to be the
predominant method (Petraki et. al., 2012)
The fracture of the When the
STAGE 2
heterogeneous electromagnetic
system in the focal anomalies are
area obstructs the emitted the “siege”
backbone of of the strong
asperities. asperities begins.
Cracking will occur in strong asperities IF local stress exceeds
their fracture stress
At this stage, critical The anomalous radon emissions of the 2008 signal, could be
anti-persistent MHz attributed to the first stage of the model, i.e., the phase in
electromagnetic which the fracture of the strongly heterogeneous medium
anomalies occur. obstructs the asperities backbone (Petraki et. al., 2012)
International Scientific Conference eRA-7
12. Conclusions
The radon anomalies can give evidence about tectonic
disturbances in the Earth’s crust, though the radon changes
The study area in South West Greece presented in radon time-
series very peculiar disorders in 2008 (Nikolopoulos et al., 2012)
The radon geophysical monitoring station revealed particuraly
interesting data in a significant period before the catastrofic
event
The cross-correlation of radon anomalies as an earthquake
precursor have to be further analyzed with multivariate statistics
in order to strengthened the theory of close interconnection.
International Scientific Conference eRA-7
13. References
UNSCEAR, United Nations Scientific Committee on the Effects of Atomic Radiation, 2000. Sources and Effects of Ionizing Radiation.
UNSCEAR 2000 Report to the General Assembly with Scientific Annexes, United Nations, New York.
Nazaroff, W.W, Nero A.V., 1988. Radon and its Decay Products in Indoor Air. John Wiley & Sons, Inc., USA. ISBN 0-471-62810-7, 518 pp.
Planinic´ J. , Radolic´ V. , Lazanin Z ., Temporal variations of radon in soil related to earthquakes, App Rad Isotop (2001) 55, 267-272
Nikolopoulos, D., Petraki, E., Marousaki, A., Potirakis, S.M., Koulouras, G., Nomicos ,C., Panagiotaras, D., Stonham, J., Louizi, A., 2012.
Environmental monitoring of radon in soil during a very seismically active period occurred in South West Greece. J. Environ. Monit.14, 564-578
Rikitake, T., 1987. Earthquake precursors in Japan: precursor time and detectability. Tectonophysics 136(3–4), 265–282
Cicerone, R.D., Ebel, J.E., Britton, J., 2009. A systematic compilation of earthquake precursors. Tectonophysics. 476, 371-396.
D. Mazur, M. Janik, P. Loskiewicz, P. Olko and J. Swankon, Measurements of radon concentration in soil gas by CR-39 detectors, Radiat.
Meas., 1999, 31, 295-300.
Eftaxias, K., Balasis, G., Contoyiannis, Y., Papadimitriou, C., Kalimeri, M., Athanasopoulou, L., Nikolopoulos, S., Kopanas, J. , Antonopoulos, G.,
Nomicos, C., 2010. Unfolding the procedure of characterizing recorded ultra low frequency, kHZ and MHz electromagnetic anomalies prior to
the L’Aquila earthquake as pre-seismic ones – Part 2. Nat. Hazard. Earth Sys. 10, 275–94.
Eftaxias, K., Balasis, G., Contoyiannis, Y., Papadimitriou, C., Kalimeri, M., Athanasopoulou, L., Nikolopoulos, S., Kopanas, J. , Antonopoulos, G.,
Nomicos, C., 2009. Unfolding the procedure of characterizing recorded ultra low frequency, kHZ and MHz electromagnetic anomalies prior to
the L’Aquila earthquake as pre-seismic ones – Part 1, Nat. Hazard. Earth Sys. 9, 1953–1971.
Hayakawa, M., Hobara, Y., 2010. Current status of seismo-electromagnetics for short-term earthquake prediction. Geomatics, Natural Hazards
and Risk 1(2), 115-155.
R. L. Fleischer and A. Mogro-Campero, Association of subsurface radon changes in Alaska and the northeastern United States with
earthquakes, Geochim. Cosmochim. Ac., 1985, 49, 1061–71.
Z. Roumelioti, C. Benetatos and A. Kiratzi, The 14 February 2008 earthquake (M6.7) sequence offshore south Peloponnese (Greece): Source
models of the three strongest events, Tectonophysics, 2009, 471 (3-4), 272-84.
International Scientific Conference eRA-7