I'm not quite sure if it would be possible to triangulate the position of the events - our sensors only detect relative changes in the magnetic field in the X and Y direction. As it stands we have only a handful of sensors: one that we operate at South Pole Station, and data that is made available to us from Taiwan. We are thinking, however, of placing a new sensor at McMurdo station so that we can see how latitude affects our findings.
Something that we've just found in the past few months shows that the occurrence of events can be limited by the elevation of the sun - we've never seen events happen when the sun was below ten degrees elevation at the south pole, and never below thirty degrees in Taiwan. Additionally, events in Taiwan seem to cut out in the two hour period surrounding local noon, suggesting that these might be highly local. They're also somewhat infrequent - we might only find two hundred such events over an entire year. We could go weeks without seeing one, and then get five events within a few hours. This might also suggest that it has something to do with solar heating of the ionosphere, given the timing of events. Note that all of this stuff is new and isn't discussed in any published literature.
As far as what's been published goes, I think there have been maybe half a dozen papers written since this phenomenon was discovered in the seventies. Here are the ones I've been able to quickly grab:
Something that we've just found in the past few months shows that the occurrence of events can be limited by the elevation of the sun - we've never seen events happen when the sun was below ten degrees elevation at the south pole, and never below thirty degrees in Taiwan. Additionally, events in Taiwan seem to cut out in the two hour period surrounding local noon, suggesting that these might be highly local. They're also somewhat infrequent - we might only find two hundred such events over an entire year. We could go weeks without seeing one, and then get five events within a few hours. This might also suggest that it has something to do with solar heating of the ionosphere, given the timing of events. Note that all of this stuff is new and isn't discussed in any published literature.
As far as what's been published goes, I think there have been maybe half a dozen papers written since this phenomenon was discovered in the seventies. Here are the ones I've been able to quickly grab:
Heacock 1974 - The first report of ELF whistler-like events http://www.agu.org/pubs/crossref/1974/GL001i002p00077.shtml
Sentman 1994 - The second study of ELF whistlers, and the only study of mid-latitude events http://www.agu.org/pubs/crossref/1994/93JA02103.shtml
Wang 2005 - First report of ELF whistlers in Taiwan http://www.agu.org/pubs/crossref/2005/2005GL022412.shtml
Kim 2006 - First reports of the events at the south pole http://www.agu.org/pubs/crossref/2006/2005GL023638.shtml
Wang 2011 - Reports on new events detected in Taiwan http://www.agu.org/pubs/crossref/2011/2011JA016832.shtml