further to post by muzzy on pg38
On 10/02/2013 I noticed a sharp increase in deep quakes off the West Coast of both the North and South Islands of New Zealand that started around 5th
Feb.. This calls for further investigation, to see if this has happened before, or is a new phenomenon with major changes to the Plate Boundary in
process or perhaps could be related to events in other parts of the Pacific (Santa Cruz Mag 7.9Mw at the time of writing).
I have created 4 interactive maps using data from GNS. Nov, Dec2012 and Jan, Feb (so far) 2013
The area of concern is shown on the February 2013 map;
2 quakes off Greymouth 404km and 278km,
2 off Hokitika, both mag 4's at 269km and 270km,
2 mag 3's NW off Cape Farewell at 323km and 325km,
4 mag 3 quakes in the North Taranaki Bight at 331km, 271km, 346km and 273,
a single 4.6 mag quake west of Auckland at 286km
and particularily 3 very deep mag 3's east and north east of the Alderman Islands (off Coromandel Pen.) at 578km, 531km, and 520km
The area down from the south end of the Havre Trough between the Coromandel Peninsula and White Island then through between Hamilton and Rotorua to
Taumarunui, south of Mt Egmont, across the South Taranaki Bight and Tasman Bay to Kahurangi National Park (the blue icons) seems to be the norm for
that depth ie 150-300km.
Anything west offshore of that "band" appears to be abnormal
The spill over off the South Island West Coast not so normal either.
November shows several deep events far off the North Island West Coast, but not the South Island.
4 months of maps isn't enough to draw a conclusion, especially with Nov also showing those spill overs on the NI west coast, more research is
edit on 11-2-2013 by muzzy because: what the conclusion really is saying is "we don't need more funding, we just need any kind of funding at
all, so I can give up my day job and do this full time