Inverse estimation of radon flux distribution for East Asia using measured atmospheric radon concentration

2015 ◽  
Vol 167 (1-3) ◽  
pp. 97-101
Author(s):  
S. Hirao ◽  
R. Hayashi ◽  
J. Moriizumi ◽  
H. Yamazawa ◽  
Y. Tohjima ◽  
...  
Keyword(s):  
East Asia ◽  
Radon Concentration ◽  
Flux Distribution ◽  
Radon Flux ◽  
Inverse Estimation ◽  
Atmospheric Radon

Measurements of radon flux and soil-gas radon concentration along the Main Central Thrust, Garhwal Himalaya, using SRM and RAD7 detectors

2013 ◽  
Vol 61 (4) ◽  
pp. 950-957 ◽  
Author(s):  
Abhay Anand Bourai ◽  
Sunita Aswal ◽  
Anoop Dangwal ◽  
Mukesh Rawat ◽  
Mukesh Prasad ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Soil Gas ◽  
Garhwal Himalaya ◽  
Main Central Thrust ◽  
Radon Flux ◽  
Soil Gas Radon

Evidence of precursor phenomena in the Kobe earthquake obtained from atmospheric radon concentration

2006 ◽  
Vol 21 (6) ◽  
pp. 1064-1072 ◽  
Author(s):  
Yumi Yasuoka ◽  
George Igarashi ◽  
Testuo Ishikawa ◽  
Shinji Tokonami ◽  
Masaki Shinogi
Keyword(s):  
Radon Concentration ◽  
Kobe Earthquake ◽  
Atmospheric Radon

scholarly journals Non-parametric detection of atmospheric radon concentration anomalies related to earthquakes

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Daichi Iwata ◽  
Hiroyuki Nagahama ◽  
Jun Muto ◽  
Yumi Yasuoka
Keyword(s):  
Radon Concentration ◽  
Atmospheric Radon ◽  
Non Parametric

scholarly journals Anomalous radon emanation linked to preseismic electromagnetic phenomena

2007 ◽  
Vol 7 (5) ◽  
pp. 629-635 ◽  
Author(s):  
Y. Omori ◽  
Y. Yasuoka ◽  
H. Nagahama ◽  
Y. Kawada ◽  
T. Ishikawa ◽  
...  
Keyword(s):  
Electric Field ◽  
Power Law ◽  
Radon Concentration ◽  
Damage Evolution ◽  
Atmospheric Electric Field ◽  
Ionospheric Disturbances ◽  
Radon Emanation ◽  
Radon Anomaly ◽  
Large Earthquakes ◽  
Atmospheric Radon

Abstract. Anomalous emanation of radon (222Rn) was observed preceding large earthquakes and is considered to be linked to preseismic electromagnetic phenomena (e.g. great changes of atmospheric electric field and ionospheric disturbances). Here we analyze atmospheric radon concentration and estimate changes of electrical conditions in atmosphere due to preseismic radon anomaly. The increase of radon emanation obeys crustal damage evolution, following a power-law of time-to-earthquake. Moreover, the radon emanation decreases the atmospheric electric field by 40%, besides influencing the maximum strength of atmospheric electric field by 104–105 V/m enough to trigger ionospheric disturbances. These changes are within the ranges observed or explaining electromagnetic phenomena associated with large earthquakes.

Preseismic changes in atmospheric radon concentration and crustal strain

2009 ◽  
Vol 34 (6-7) ◽  
pp. 431-434 ◽  
Author(s):  
Yumi Yasuoka ◽  
Yusuke Kawada ◽  
Hiroyuki Nagahama ◽  
Yasutaka Omori ◽  
Tetsuo Ishikawa ◽  
...  
Keyword(s):  
Radon Concentration ◽  
Crustal Strain ◽  
Atmospheric Radon
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