Identification of earthquake precursors in soil radon-222 data of Kutch, Gujarat, India using empirical mode decomposition based Hilbert Huang Transform

Sahoo, Sushanta Ku; Katlamudi, Madhusudhanarao; Barman, Chiranjib; Lakshmi, G. Udaya

doi:10.1016/j.jenvrad.2020.106353

Cited by 36 publications

(17 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Several interesting non-linear features were observed in the EMD-HHT analysis. The temporal variation in the instantaneous energy had a good correlation with four local earthquakes during the study period [90]. A significant decrease in the atmospheric radon concentrations was temporally linked to seismic quiescence before the 2018 Northern Osaka earthquake occurred at a hidden fault with complex rupture dynamics.…”

Section: Radon and Earthquakesmentioning

confidence: 77%

Relationships among Indoor Radon, Earthquake Magnitude Data and Lung Cancer Risks in a Residential Building of an Apulian Town (Southern Italy)

et al. 2021

View full text Add to dashboard Cite

(1) Background: The association of radon-222 with lung cancer is well studied. The aim of the study was to validate a model of indoor radon measurements, to apply radon software to estimate lung cancer cases that are attributable to radon and to study the relationship between radon and earthquakes. (2) Methods: Different data detectors were used to obtain radon measurements in different places. Continuous data collection and predictions of indoor radon concentrations were carried out. Software was used to assess radon-attributable lung cancer cases, and data related to earthquake magnitudes were downloaded from Italian Vulcanology Institute. (3) Results: As expected, the highest radon concentrations were observed on the ground floor (232 ± 232 Bq/m3), with higher values measured during winter than in other seasons. The comparison of the detectors showed the overlapping of the two detectors-measured data sets. The cases of lung cancer that were attributable to radon in Locorotondo were studied (3.66/10,000). From the multivariate analysis of the relationship between high radon concentrations and high earthquake magnitude values, they show statistically significant ORs of just over 1. (4) Conclusions: Although the measured values are, on average, within the reference level, prevention measures must be implemented, as the measured radon values allow us to estimate an expected value of 3.66 cases of lung cancer per 10,000 people in the resident population.

show abstract

Section: Radon and Earthquakesmentioning

confidence: 77%

Relationships among Indoor Radon, Earthquake Magnitude Data and Lung Cancer Risks in a Residential Building of an Apulian Town (Southern Italy)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Radon is a member of the radioactive chain of uranium-238 and is continuously formed in all natural environments during the radioactive decay of its parent isotope, radium-226, which has a half-life of about 1600 years (Sabbarese et al 2021;Giustini et al 2019;Miklyaev et al 2010;Baskaran et al 2016;Daraktchieva et al 2021). Due to its physical and chemical properties, as well as being an inert gas with a relatively long half-life (3.82 days), it is an optimal indicator for studying many processes occurring in the environment (Loisy et al 2012, Kuo et al 2014, Selvam et al 2021, including in geological research, for example, for predicting seismic phenomena and other geodynamic processes (Sahoo et al 2020;Kawabata et al 2020). Free radon exhibits the ability to easily migrate in the geological environment in the gas phase or dissolved in pore waters.…”

Section: Permafrost As a Barrier To Radioactive Radon Gasmentioning

confidence: 99%

Radon Hazard In Permafrost Conditions: Current State Of Research

Puchkov

Yakovlev

Hasson

et al. 2021

GES

View full text Add to dashboard Cite

In this paper, we review both practical and theoretical assessments for evaluating radon geohazards from permafrost landforms in northern environments (>60º N). Here, we show that polar amplification (i.e. climate change) leads to the development of thawing permafrost, ground subsidence, and thawed conduits (i.e. Taliks), which allow radon migration from the subsurface to near surface environment. Based on these survey results, we conjecture that abruptly thawing permafrost soils will allow radon migration to the near surface, and likely impacting human settlements located here. We analyze potential geohazards associated with elevated ground concentrations of natural radionuclides. From these results, we apply the main existing legislation governing the control of radon parameters in the design, construction and use of buildings, as well as existing technologies for assessing the radon hazard. We found that at present, these laws do not consider our findings, namely, that increasing supply of radon to the surface during thawing of permafrost will enhance radon exposure, thereby, changing prior assumptions from which the initial legislation was determined. Hence, the legislation will likely need to respond and reconsider risk assessments of public health in relation to radon exposure. We discuss the prospects for developing radon geohazard monitoring, methodical approaches, and share recommendations based on the current state of research in permafrost effected environments.

show abstract

“…活动断裂带气体地球化学特征常与区域内地震活动密切相关 [68][69][70][71] . 断裂带土壤气体(CO 2 、 CH 4 、Rn 和 Hg 等)在地震前后经常出现特殊的异常现象 [19,72] ，其异常幅度也常随着地震活动的变化而变化 [42,73,74] .意大利 L'Aquila 地区 6.…”

Section: 气体地球化学异常unclassified

Advances in seismic fluid geochemistry and its application in earthquake forecasing

Li¹,

Zhi²,

Hu³

et al. 2021

Chin. Sci. Bull.

View full text Add to dashboard Cite

Earthquakes are one of the most serious natural disasters of the world, with huge potential to cause serious injury and damage to humans and society. Earthquake forecasting, however, still remains a worldwide unsolved problem. The generation and occurrence of an earthquake-accompanied by material migration, energy transmission and abrupt changes of underground conditions-can result in the migration and evolution of geochemical elements and isotopes in natural fluids. Active fault zones are not only earthquake-prone areas but also deep fluid overflow channels. The geochemical characteristics of fluids in active faults act as good indicators for tectonic and seismic activities due to their high sensitivities to the changes of stress, temperature and permeability in the crust. The spatial and temporal variations of fluids in the active fault zones are closely related to the deep geological process and as well as the type, scale, and state of the active faults. On the contrary, the state change of an active fault can continue to affect the evolution and migration process of the deep fluids. The close relationship between fluid geochemistry and active faults makes fluid geochemistry not only an important role in earthquake forecasting but also an effective means to explain the changes of materials and conditions that take place during an earthquake. Before the occurrence of an earthquake, the stress and strain can lead to complex changes of chemical elements and isotopes in subsurface water, gas, soil and/or other media, that is, seismic fluid geochemistry anomalies. Therefore, in active fault zones or seismically active areas, monitoring the fluid geochemistry in these surface media and effectively identifying anomalies related to earthquakes have been identified as promising methods for earthquake forecasting. In recent years, seismic fluid geochemistry has been widely used to forecast earthquakes around the world due to its comparatively low costs and the advantages of its timeliness, simplicity, and convenience. Furthermore, with the accumulation of observation data, improved data processing methods and summaries of earthquake cases, more and more fluid geochemistry anomalies are being detected before the occurrence of earthquakes, particularly that of big earthquakes. As a result of the early detection of geochemistry anomalies, some earthquakes have even been successfully predicted. In addition, new analytical techniques play a more significant role in studies of the mechanism of earthquake precursors and seismic physical processes. However, most earthquake predictions are currently based on phenomenon correspondence and/or empirical statistics, and the lack of research on the genetic mechanism of seismic fluid geochemistry anomalies leads to difficulties in the further application of this method. As such, there remains significant room for improvement for the construction of a prediction model based on seismic fluid geochemistry. In this paper, the recent research progress of seismic fluid geochemistry in the f...

show abstract

Identification of earthquake precursors in soil radon-222 data of Kutch, Gujarat, India using empirical mode decomposition based Hilbert Huang Transform

Cited by 36 publications

References 56 publications

Relationships among Indoor Radon, Earthquake Magnitude Data and Lung Cancer Risks in a Residential Building of an Apulian Town (Southern Italy)

Relationships among Indoor Radon, Earthquake Magnitude Data and Lung Cancer Risks in a Residential Building of an Apulian Town (Southern Italy)

Radon Hazard In Permafrost Conditions: Current State Of Research

Advances in seismic fluid geochemistry and its application in earthquake forecasing

Contact Info

Product

Resources

About