HR: 1340h
AN: S13B-1303    [Abstracts]
TI: Search of Possible Triggered Seismicity Patterns of Northern Tien Shan
AU: * Novikov, V
EM: novikov@ihed.ras.ru
AF: Joint Institute for High Temperatures of Russian Academy of Sciences, 13/19, Izhorskaya str., Moscow, 125412, Russian Federation
AU: Vorontsova, E
EM: voroncova@mail.ru
AF: Joint Institute for High Temperatures of Russian Academy of Sciences, 13/19, Izhorskaya str., Moscow, 125412, Russian Federation
AB: Statistical analysis of the Northern Tien Shan seismicity was performed considering the possible triggering impacts of natural and man-made mechanical and electromagnetic factors on seismic activity. Strong distant earthquakes, lunar-solar tides, and magnetic storms are considered as natural triggering factors. The man-made factors include underground nuclear explosions (UNE) and electromagnetic impacts provided by high-power magnetohydrodynamic pulsed (MHD) generators. The representative local earthquake catalog of the region under study (41°-46° N, 74°-82° E) includes 15577 events of M>1.67 from 1975 to 2000. Within this time period 330 UNE and 109 firing runs of MHD generators, which are considered as the possible man-made earthquake triggering factors, have been performed within or adjacent to the analyzed region. Various statistical methods (cross-correlation, spectral analysis, RTL-analysis, etc.) were employed. For the used statement of problem and applied initial data the statistically significant patterns of triggered seismicity of the Northern Tien-Shan due to impacts of UNE and MHD generators were not found. Large common periods of seismicity variation for time series of distant strong earthquakes and local seismic events were selected. There is significant number of common periods (7, 9, 14, 28, 186, and 16384 days) for variation of z-component of the earth tide and release of seismic energy that may point to an influence of the earth tides on the local seismicity.
DE: 1242 Seismic cycle related deformations (6924, 7209, 7223, 7230)
DE: 3255 Spectral analysis (3205, 3280)
DE: 3270 Time series analysis (1872, 4277, 4475)
DE: 7209 Earthquake dynamics (1242)
DE: 7223 Earthquake interaction, forecasting, and prediction (1217, 1242)
SC: Seismology [S]
MN: 2007 Fall Meeting