  A search for the possible precursors of an earthquake and its effect on the
data series of diverse geophysical parameters has been made in the mountain of
Northern Tien Shan. The complex installation included the NM64 type neutron
supermonitor, detectors of the environmental low-energy neutrons, the
scintillation gamma-detector, the sensor of the local electric field, a
seismograph, and a weather-station. The specialized data filtration methodic
was elaborated with an enhanced sensitivity to the transient signals of seismic
origin. On the eve of, and after a 5.4 magnitude earthquake the fine features
in temporal behavior of the intensity of low-energy neutron and gamma-radiation
background, so as irregularities of the local electric field were observed
which seem to be in a close correlation with each other. These results may be
an evidence of the possibility of experimental identification of earthquake's
precursors in the time up to 2-3 days before the beginning of a period of
intensive tectonic activity.
