Investigation of the relationship between earthquakes and indoor radon concentrations at a building in Gyeongju, Korea

Kim, Jae Wook; Joo, Han Young; Kim, Rinah; Moon, Jooho

doi:10.1016/j.net.2017.12.010

Cited by 16 publications

(3 citation statements)

References 3 publications

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“…Gyeongju earthquake occurred on September 12, 2016. On August 10, 2016, about 1 month earlier than the earthquake, the peak indoor radon concentration was 117.6 Bq/ 3 , and the average over August of 2017 was 26.6 ± 24.69 Bq/ 3 [15]. One year later, August 10 to 16, 2017, the average and peak indoor radon concentrations were 10.2 ± 0.9 Bq/ 3 and 45.21 Bq/ 3 .…”

Section: Comparison With the Gyeongju Earthquakementioning

confidence: 97%

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Investigation of Changes in Indoor Radon Concentrations Before and After Seismic Activities in Gyeongju and Pohang, Korea

Joo¹

2019

GEOMATE

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This paper made a continuous measurement of the indoor radon concentrations at a university building in Gyeongju, Rep. of Korea, to check if there is any notable pattern between the indoor radon concentrations and seismic activities. On September 12, 2016, earthquakes with a magnitude of 5.1 and 5.8 consecutively occurred in Gyeongju. 14 months later, an earthquake with a magnitude of 5.5 occurred in Pohang, about 30 km away from Gyeongju, on November 15, 2017. This study investigated the change in the indoor radon concentrations before and after earthquakes to identify if there is any pattern between them and found an interesting pattern. Prior to earthquakes, radon anomalies, which are radon concentration deviating by more than ±2σ from the seasonal average, was usually identified. When 5.0 or greater magnitude earthquakes occurred, the indoor radon concentrations decreased sharply a few days before them, and then continuously increased until the occurrence of the earthquake.

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Section: Comparison With the Gyeongju Earthquakementioning

confidence: 97%

“…If the radon concentration deviates by more than ±2σ from the seasonal average, it is possible to say that radon anomalies are possibly caused by earthquake events and not by meteorological parameters [15]. We took a closer look at the period of September 25 to November 21, 2017.…”

Section: Indoor Radon Concentration Variation Over Timementioning

confidence: 99%

Investigation of Changes in Indoor Radon Concentrations Before and After Seismic Activities in Gyeongju and Pohang, Korea

Joo¹

2019

GEOMATE

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“…Измерения фиксировались с помощью детектора RAD 7 каждые 30 минут. В результате выявлены сходные всплескоподобные закономерности между распределением концентрации радона в помещении и землетрясениями: внезапное увеличение концентрации радона в помещении за 1-4 дня до землетрясения, постепенное снижение перед землетрясением и внезапное падение в день землетрясения [Kim et al, 2018].…”

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Well thermal variations and in volume radon activity changes during earthquake preparation process

Заалишвили¹,

Бирюлин²,

Козлова³

et al. 2022

Геология И Геофизика Юга России

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Интерес к прогнозу землетрясений по-прежнему актуален и исследования в этом направлении продолжаются. Изучено большое количество природных явлений, предваряющих или вызываемых землетрясениями. В настоящее время таких явлений насчитывается около двухсот. К наиболее чётко проявляющимся и достаточно хорошо исследованным относятся явления, связанные с изменением напряженно-деформированного состояния горных пород. Известны примеры успешного использования гидрогеодинамических, сейсмологических и радоновых признаков предвестников при краткосрочном прогнозе сейсмических событий. Несмотря на широкий спектр проведенных радоновых исследований, не были выявлены надежные признаки поведения объемной активности радона, связанные с процессом подготовки сейсмического события. Цель исследования. Целью работы является изучение возможности применения особенностей изменения радонового поля (поля объемной активности почвенного радона) при подготовке тектонического землетрясения в сейсмически активных регионах с отличающейся геодинамической обстановкой. Методы работы. Мониторинг радона выполнялся на геофизических полигонах в Южно-Курильском и Кавказском регионах. Измерения выполнялись при принудительной доставке почвенного воздуха к детектору (адвективный режим). Результат работ.Результаты радонового мониторинга на станции Кармадон показывают, что поведение кривой ОАР перед землетрясениями ближней зоны не противоречит закономерностям, установленным для Южно-Курильского региона. Interest in earthquake prediction is still relevant and research in this direction continues. A large number of natural phenomena that precede or are caused by earthquakes have been studied. Currently, there are about two hundred such phenomena. The phenomena associated with changes in the stress-strain state of rocks are among the most clearly manifested and fairly well studied. There are examples of successful use of hydrogeodynamic, seismological and radon signs of precursors in the short-term prediction of seismic events. Despite the wide range of radon studies conducted, reliable signs of the behavior of volumeradonactivity associated with the process of preparing a seismic event have not been identified. Aim. The aim of the work is to study the possibility of applying the features of the radon field change (the field of volumesoilradon activity) in the preparation of a tectonic earthquake in seismically active regions with different geodynamic conditions. Methods. Radon monitoring was carried out at geophysical landfills in the South Kuril and Caucasus regions. Measurements were performed with forced delivery of soil air to the detector (advective mode). Results. The results of radon monitoring at the Karmadon station show that the behavior of the VRA curve before earthquakes in the near zone does not contradict the patterns established for the South Kuril region.

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Seasonal variation of indoor radon/thoron and their progeny levels in lesser-Himalayas of Jammu & Kashmir, India

Kumar

Vij

Sharma³

et al. 2019

J Radioanal Nucl Chem

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Investigation of the relationship between earthquakes and indoor radon concentrations at a building in Gyeongju, Korea

Cited by 16 publications

References 3 publications

Investigation of Changes in Indoor Radon Concentrations Before and After Seismic Activities in Gyeongju and Pohang, Korea

Investigation of Changes in Indoor Radon Concentrations Before and After Seismic Activities in Gyeongju and Pohang, Korea

Well thermal variations and in volume radon activity changes during earthquake preparation process

Seasonal variation of indoor radon/thoron and their progeny levels in lesser-Himalayas of Jammu & Kashmir, India

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