Resources to learn

On these links you will find charts of neutron monitors, an archive of data on the geomagnetic perturbations of the Earth, an article on seismoelectric effects in the propagation of elastic waves in rocks.

1. Neutron monitors.
2. Archive of data on geomagnetic disturbances of the Earth.
3. Seismoelectric effects in the propagation of elastic waves in rocks.
4. Schumann resonances.