Live chat: GNS scientist Kelvin Berryman
© Fairfax NZ NewsOn the eve of the Christchurch earthquake anniversary, GNS Science earthquake expert Kelvin Berryman joins us at midday to answer your questions.
Ask an Expert: Canterbury Faults 'quite strong"
Kiwi scientists join petition against "ridiculous" trial over failure to predict deadly Italian earthquake.
+ Scientists on trial
LATEST: Seven scientists are on trial for allegedly failing to warn of a devastating quake in Italy.
How much concern is there about the so-called New Brighton-City Fault that runs close to Moorhouse Ave?
A new fault zone has recently been identified off the coast near Kaiapoi but may not have moved for 10,000 years.
Did the lack of water due to the many dairy farms affect the magnetic plate's temperature and set off the Greendale Fault?
© Fairfax NZ NewsEarthquake magnitude is not a linear scale. For every step up in magnitude there is about a 30 times increase in energy released.
© Fairfax NZ NewsHow far down does the shingle go? What is under it? Solid rock?
DAVID WILLIAMS - © Fairfax NZ NewsThe gash torn in the Canterbury Plains by last year's Darfield earthquake had the highest ratio of movement for its length of any recorded quake, University of Canterbury scientists say.
When the Alpine Fault goes, would it trigger faults to rupture here?
If our fault runs from Methven to offshore Canterbury. What would be the potential quake size of a fault this long?
© Fairfax NZ NewsHaiti experienced 42 aftershocks, Japan 726 and Canterbury over 7000 aftershocks. Why?