Effect of solar eclipses on neutron flux variations at the Earth’s surface

The results of the investigation of the neutron flux variations at the Tien Shan high-altitude scientific station during solar eclipses on September 23, 1987; August 11, 1999; and March 29, 2006 are reported. It is established that, during these periods, the dynamics of neutron intensity variations in the frequency range 10−5–10−3 Hz is due to geophysical sources of disturbances. An increase in the thermal neutron flux from the Earth’s Crust is observed.