Overdue? My bad poetic exaggeration - I just meant that it could go soon if its history is anything to go by (seems to pop every 0.7M years/ish - so we do have a little wait if it's going to precise).
That is of course unless the EQ swarm that is happening at present continues or worsens enough for Geoelectromagnetic energy or geothermalfrictional dooberies (I am joking)'warms' things up - or HAARP gets a bad blow-back?

I'm just wondering what people think of the current situation really - not suggesting immanency.

1000 Litre3 = 1 cubic tonne
1 cubic tonne = 1 000 000 000 kg3

Is this correct?