David Neal is the Red Cross National Operations Manager and is making his way to Christchurch to coordinate efforts with his staff.
Reporter Jessica Horn is at Burnside High School, where a welfare centre has been set up.
Radio New Zealand Reporter Rachel Graham is at the Christchurch City Council's civil defense headquarters.
Judith Hughey is a Christchurch resident.
Michael Brook is the Operations Manager of St John.
The Government is promising the new authority set up to lead Christchurch's rebuilding will listen to local people.
The support has been outstanding for those with damaged homes, buildings and farm infrastructure, but some are still too shattered to really know what to get the keen helpers to do.
Orion's chief executive, Roger Sutton outlines the power situation in Christchurch.
John Townend is an Associate Professor at the School of Geography, Environment and Earth Sciences at Victoria University Wellington.
Daille Rogers is at Hagley Park where people have been evacuated from the central city.
John Townend is an Associate Professor at the School of Geography, Environment and Earth Sciences at Victoria University Wellington.
Kimberley Grady works for KiwiRail.
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.
Jane Patterson has been at the Beehive bunker getting a civil defence update.
Jim Palmer is the CEO of the Waimakariri District Council.
David Miller is from Christchurch Civil Defence.
Barry Saunders is at the epicentre of the earthquake - Lyttleton.
Labour Party leader Phil Goff is outside the Pyne Gould building - where people are trapped inside.
James Thompson is the Operations Manager for Civil Defence Christchurch.
Bridget Mills is in Latimer Square at a triage centre.
Dave Cliff is the Police Superintendent.
John Townend is a seismologist for GNS; and an Associate Professor at the School of Geography, Environment and Earth Sciences.
Denise Torrey is the principal of Summerfield School in the south of Christchurch.
Radio New Zealand reporter Jessica Maddock has been to a Civil Defense Briefing.
John Carter, Minister for Civil Defence gives reporters in Wellington a briefing.
A document produced by SPCA Canterbury describing their experiences after the 4 September 2010 earthquake.
The magnitude 4.0 quake was 15km east of Christchurch.
A magnitude 5.1 earthquake struck Canterbury Monday night. Four thousand people reportedly felt the quake, which was centred 30 kilometres west of Methven. GNS Science seismologist Dr Jonathan Hanson spoke to Ingrid Hipkiss.
Rolleston/Burnham, South Island, NZ It's been a busy few weeks! Was away on geology fieldtrips all the previous two weeks, then on Saturday morning 4th September 2010 at 4.35 am we got woken in Westport to a reasonable but very long earthquake. My husband was back in Christchurch at the time and texted me saying "are you ok?". I replied, "yes!"...