Were solar neutrons observed by neutron monitors on 1984 April 25?

The 3B/X13 solar flare beginning at 2356 UT on April 24, 1984 was identified as a solar neutron event by the gamma-ray spectrometer on the Solar Maximum Mission spacecraft and by the observation of protons resulting from neutron decay by the University of Chicago experiment on board the ISEE 3 spacecraft. Evidence for a possible ground-based response to the solar neutrons was not reported until recently. In this paper, the neutron monitor data for locations within 50 deg of the subsolar point during the solar flare event are presented and analyzed. The difficulties in identifying this possible ground-based response are discussed in detail. 16 refs