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We have examined instigating events at the Sun that may be responsible fortwo of the most recent outer heliospheric kHz emissions detected by theUniversity of Iowa plasma wave detector on Voyager 1 starting at 2004.64 and2006.39, respectively. These interplanetary events have been followed outwardfrom the Sun using plasma and cosmic ray data from Ulysses and Voyagers 1 and2. For both intervals of kHz emissions, events originating near the Sun thatturn out to be the most intense events in this 11-year solar cycle as observedby the plasma and cosmic ray variations in the outer heliosphere, reach V1 andV2 which are near the heliospheric termination shock at almost the same timethat the two kHz radio emissions turn-on. These two events which originate nearthe Sun about 2003.89 (the 2003 Halloween event) and at 2005.71, are alsounusual in that they develop solar wind ram pressure waves in the outerheliosphere with maximum pressures ~6-8 times the average solar wind pressurewhen they reach the heliospheric termination shock. We believe that this studysuggests a possible new paradigm for the origin of these latest kHz emissions.This new paradigm is different from the current one describing earlier kHzevents. It is related to the strength of these pressure waves in the outerheliosphere and involves the arrival of these large pressure waves at theheliospheric termination shock rather than the arrival of a shock at theheliopause as is the current paradigm.

Two recent kHz outer heliospheric radio emissions seen at Voyager 1-What  are the interplanetary events that trigger them and where are these events  when the radio emissions start?