Apparently BoM is actually sending real-time earthquake & tsunami information. Thanks to Nigel at RA for the following little bit of info:
The BoM service comes from Melbourne. With 1 kW rms (or less) into an omni-directional & high take-off angle aerial the mechanics of the system discriminate against long haul transmission. The signal is great in Melbourne during the day of course. I missed the early telephony streaming test, but Mode C, 8QAM & 8.64 kb/s gives a robust service for Journaline purposes. It's fascinating to watch pages of information on seismic activity from around the south Pacific and SE Asia updating in real-time. I guess our BoM has access to this because it was "designated" the Australian agency concerned with identifying tsunami threats & disseminating alerts. They didn't think much of this proposal at the time ("earthquakes aren't a meteorological event!") but some money was found for them so they cope.
Here in New Zealand the best I've been able to decode is the title of the Journaline