D. F. Smart

TL;DR: In this paper, the geophysical significance of the thin nitrate-rich layers that have been found in both Arctic and Antarctic firn and ice cores, dating from the period 1561-1991, is examined in detail.

TL;DR: In this paper, the vertical cut-off rigidities of cosmic ray for more than 300 positions on Earth surface, using sixth degree simulations of quiescent geomagnetic field were analyzed.

TL;DR: A total of 125 large fluence solar proton events identified from the nitrate deposition in ice core from Greenland for the period 1561-1950 are examined in an exploratory study of the geophysical information that will be available from such data in the future.

TL;DR: In this article, vertical cutoff rigidities have been calculated for a world grid 5 degrees in latitude and 15 degrees in longitude using the Finch and Leaton sixth-degree simulation of the quiescent geomagnetic field.

TL;DR: In this article, a supplement to IQSY Instruction Manual No. 10, Cosmic Ray Tables by McCracken et al. (1965) contains the asymptotic directions, variational coefficients and cutoff rigidities for 48 stations not included in the original manual in addition to an explanatory text.