Relation of radon advection rate and flux density with strong earthquakes of South Kamchatka in 2000-2008

  1. Kamchatkan Branch, Geophysical Survey, Russian Academy of Sciences, Petropavlovsk-Kamchatsky, 683006
  2. Institute of Cosmophysical Researches and Radio Wave Propagation FEB RAS 3
  3. Tomsk Polytechnic University, Tomsk

We studied the radon flux density of (RFD) and the radon (Rn) advection rate during the periods of seismic
activity in 2000-2009 in the South Kamchatka. RFD and the radon advection rate were calculated using the
methods which were realized in "REXEM" and «GeoRadon2» computer programs. The methods of calculation
of the radon (Rn) advection rate and RFD were based on the diffusion-advective model of radon transportation
in the ground. We used experimental data obtained in the aeration zone at two depths at the stations of
monitoring of ground radon concentration at Petropavlovsk-Kamchatsky geodynamic test ground. Before a
strong earthquake with the magnitude greater than M> 6 and the epicentral distance of less than 150 km, the
anomalies were detected in the dynamics of radon advection rate and RFD, which are hardly noticeable in the
original time series of Rn volumetric activity.