Response of the environmental thermal neutron flux to earthquakes

被引：18

作者：

Stenkin, Yuri ^{[1
,2
]}

Alekseenko, Victor ^{[1
]}

Cai, Zeyu ^{[3
]}

Cao, Zhen ^{[4
]}

Cattaneo, Claudio ^{[5
]}

Cui, Shuwang ^{[3
]}

Firstov, Pavel ^{[6
]}

Girolett, Elio ^{[5
,7
]}

Guo, Xuewen ^{[3
]}

He, Huihai ^{[4
]}

Liu, Ye ^{[8
]}

Ma, Xinhua ^{[4
]}

Shchegolev, Oleg ^{[1
]}

Vallania, Piero ^{[9
,10
]}

Vigorito, Carlo ^{[10
,11
]}

Yanin, Yaroslav ^{[1
,2
]}

Zhao, Jing ^{[4
]}

机构：

[1] Russian Acad Sci, Inst Nucl Res, Moscow, Russia

[2] Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow, Russia

[3] Hebei Normal Univ, Coll Phys Sci & Informat Engn, Shijiazhuang, Hebei, Peoples R China

[4] Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing, Peoples R China

[5] Univ Pavia, Dip Fis, Pavia, Italy

[6] Russian Acad Sci, Kamchikan Expt & Method Seismol Dept, Geophys Survey, Petropavlovsk Kamchatski, Russia

[7] Ist Nazl Fis Nucl, Pavia, Italy

[8] Heibei Univ Econ & Business, Sch Management Sci & Engn, Shijiazhuang, Hebei, Peoples R China

[9] Ist Nazl Astrofis, Osservatorio Astrofis Torino, Turin, Italy

[10] Ist Nazl Fis Nucl, Turin, Italy

[11] Univ Torino, Dipartimento Fis, Turin, Italy

来源：

JOURNAL OF ENVIRONMENTAL RADIOACTIVITY | 2019年 / 208卷

关键词：

Thermal neutron; Radon; Earthquake; EN-Detector; RADON;

D O I：

10.1016/j.jenvrad.2019.05.013

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Some new results were obtained by the array of EN-detectors (Electron and Neutron detectors) developed in the frame of the PRISMA (PRimary Spectrum Measurement Array) project for Extensive Mr Showers detection. Our EN-detectors running both on the Earth surface and underground are continuously measuring the environmental thermal neutron flux. Neutrons are partially produced by radioactive gas radon and its daughter decays through (alpha,n)-reactions in soil close to the detectors. Then neutrons thermalize in media and, being in equilibrium with it, they are sensitive to many geo-dynamic phenomena including earthquakes. In this work the EN-detectors were measuring the variations of an environmental neutron flux in Tibet (30.11 N, 90.53 E, 4300 m a.s.l) at a distance of similar to 600 km from the collision zone of the Asian-Indian plates subduction zone (Nepal region). We have ob- served some anomalies in the dynamics of the neutron flux around the time of the catastrophic earthquakes of magnitude M = 7.8 happened in Gorkha (Nepal) on 25.04.2015 followed by a series of aftershocks of M > 6. The use of nuclear physics methods can provide novel results in geophysics and this work demonstrates the sensitivity of the environmental thermal neutron flux to changes in tense-deformed crust conditions caused by earthquakes with epicentral distances greater than 500 km.

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