The Adelaide University cosmic ray shower at Buckland Park

An installation consisting of eight scintillators, spaced over an area of about 104m2 is in operation. It records the direction of arrival, size and point of impact of cosmic ray air showers in the energy region about 1016 eV. Radio-like signals associated with the arrival of showers have been observed over a range of frequencies from 100 kHz to 50 MHz. At the high frequency end of this range the signals are known to be generated by the interaction with the earth's magnetic field of the electric charges in the shower. At low frequencies the observations at Buckland Park suggest that an interaction with the earth's electric field is responsible. At frequencies of a few MHz the measurements seem inconsistent with those at either lower or higher frequencies. (author)