Judith Hughey is a Christchurch resident.
Kimberley Grady works for KiwiRail.
Paul Norris is from The New Zealand Broadcasting School at CPIT.
Labour Party leader Phil Goff is outside the Pyne Gould building - where people are trapped inside.
Jackie Shields is a resident of the Burwood suburb in Christchruch.
Orion's chief executive, Roger Sutton outlines the power situation in Christchurch.
Radio New Zealand reporter Jessica Maddock reports from the Christchurch City Art Gallery which has been converted into a Civil Defence centre.
Jane Patterson has been at the Beehive bunker getting a civil defence update.
Mayor of Christchurch, Bob Parker tells Cantabrians to take precautions, and declares a State of Emergency.
Radio New Zealand reporter Katy Gossett reports from Linwood.
John Townend is a seismologist for GNS; and an Associate Professor at the School of Geography, Environment and Earth Sciences.
Megan Hazeldean runs the Akaroa Cottages in Banks Pennisula.
Mary Macharpher is in Sydenham, and has two bedrooms for anyone who might need them.
Monique Devereux is a Christchurch resident and former Radio New Zealand reporter.
Michael Brook is the Operations Manager of St John.
Monique Oomen is at a closed Christchurch airport.
Radio New Zealand reporter Jessica Maddock reports from the Christchurch Central City cordon.
Roger Sutton is Orion's Chief Executive.
Radio New Zealand's Head of News, Don Rood, has just arrived in Christchurch.
David Neal is the Red Cross National Operations Manager and is making his way to Christchurch to coordinate efforts with his staff.
David Meates is the Chief Executive of the Canterbury District Health Board.
Alistair Hamilton is the Canterbury Medical Officer of Health.
Christchurch Mayor Bob Parker says that this earthquake felt as violent as the one in September.
Rauol Dykestra works for the Fire Service.
Barry Saunders is at the epicentre of the earthquake - Lyttleton.
John Carter, Minister for Civil Defence gives reporters in Wellington a briefing.
The NZ dollar has tumbled and the stock market has fallen.
Jim Palmer says there is significant damage, but it is not as bad as the September 4 earthquake last year.
Peter Cooper is in the suburb of Woolston.
Radio New Zealand reporter Rachel Graham is in Latimer Square.