Novel determination of radon-222 velocity in deep subsurface rocks and the feasibility to using radon as an earthquake precursor

Hovav Zafrir, Yochai Ben Horin, Uri Malik, Chaim Chemo, Zeev Zalevsky

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A novel technique utilizing simultaneous radon monitoring by gamma and alpha detectors to differentiate between the radon climatic driving forces and others has been improved and used for deep subsurface investigation. Detailed long-term monitoring served as a proxy for studying radon movement within the shallow and deep subsurface, as well as for analyzing the effect of various parameters of the radon transport pattern. The main achievements of the investigation are (a) determination, for the first time, of the radon movement velocity within rock layers at depths of several tens of meters, namely, 25 m/h on average; (b) distinguishing between the diurnal periodical effect of the ambient temperature and the semidiurnal effect of the ambient pressure on the radon temporal spectrum; and (c) identification of a radon random preseismic anomaly preceding the Nuweiba, M 5.5 earthquake of 27 June 2015 that occurred within Dead Sea Fault Zone.

Original languageEnglish
Pages (from-to)6346-6364
Number of pages19
JournalJournal of Geophysical Research: Solid Earth
Volume121
Issue number9
DOIs
StatePublished - 1 Sep 2016

Bibliographical note

Publisher Copyright:
©2016. American Geophysical Union. All Rights Reserved.

Keywords

  • differentiate between the radon climatic driving forces and others
  • radon as an earthquake precursor
  • radon movement within shallow and deep subsurface
  • radon-222 velocity in deep subsurface rocks

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