^pof;
Geophysics,;
China;
Earthquake;
Administration,;
Beijing;
100081,;
China;
^pof;
Earthquake;
Science,;
China;
Earthquake;
Administration,;
Beijing;
100036,;
China;
^pof;
Physical;
and;
Chemical;
Environment,;
National;
Center;
for;
Scientific;
Research,;
Orleans;
45071,;
France;