Volcanic dust and meteor rates.

A worldwide increase in radar mleteor echo rates in 1963 correlates with the injection of massive quantities of volcanic dust into the upper atmosphere by the explosion of Mount Agung in Bali in March 1963. The consequent change in atmospheric radiative heating most probably produced the increase by changing the air density gradient.

Meteors: An Unexpected Increase in 1963.

Counts of meteors observed by radar from Christchurch, New Zealand, rose unexpectedly by over 100 percent during mid-1963. A similar but smaller increase was also observed in Canada. Diminishing peaks have subsequently appeared at 6-month intervals in the Christchurch meteor counts.