A tree in Hagley Park wrapped in tape. The tape reads, "Danger", warning people that the tree is unsafe.
A photograph captioned by BeckerFraserPhotos, "A warning sign spray-painted on a concrete wall in Manchester Street".
A photograph of a boarded-up building on Hereford Street. A spray-painted warning on the board reads, "Danger, prop".
A photograph captioned by BeckerFraserPhotos, "Warning on the car park of St Josephs Catholic Church, Winchester Street, Lyttelton".
A photograph of a warning sign placed next to a river in Christchurch. The sign reads, "Warning contaminated water. Due to sewage overflows this water is unsafe to human contact and activity and a public health risk. Please keep all people and pets out of contact with the water and do not consume any seafood or shellfish collected from this area".
A warning which reads "Polluted Water, Please avoid Contact, Christchurch City Council" on a tree next to the Avon River in Avonside.
A laminated paper sign attached to a power pole on Acland Avenue in Avonside reading, "Warning. 24-hour video surveillance in this area".
A photograph of a road sign warning of demolition work. The photograph is captioned by BeckerFraserPhotos, "Kingsford Street, Horseshoe Lake, Burwood".
A photograph of cracks along a street in Christchurch. A road cone has been placed over a crack as a warning for road users.
A photograph of a hole in a road. Road cones and police tape have been placed around the hole as a warning to road users.
A sign on Robson Avenue warning the public of "Low Power Lines". The power poles sank during the earthquake due to liquefaction destabilising the ground underneath.
A photograph of a humorous sign reading, "Warning! No pot holes next 400 m". The photograph captioned by Paul Corliss, "Just before intersection of Kilmore St with Fitzgerald Avenue".
A photograph of a humorous sign reading, "Warning! No pot holes next 400 m". The photograph captioned by Paul Corliss, "Just before intersection of Kilmore St with Fitzgerald Avenue".
A photograph of a humorous sign reading, "Warning! No pot holes next 400 m". The photograph captioned by Paul Corliss, "Just before intersection of Kilmore St with Fitzgerald Avenue".
A photograph of a humorous sign reading, "Warning! No pot holes next 400 m". The photograph captioned by Paul Corliss, "Just before intersection of Kilmore St with Fitzgerald Avenue".
A photograph of a humorous sign reading, "Warning! No pot holes next 400 m". The photograph captioned by Paul Corliss, "Just before intersection of Kilmore St with Fitzgerald Avenue".
A photograph of a humorous sign reading, "Warning! No pot holes next 400 m". The photograph captioned by Paul Corliss, "Just before intersection of Kilmore St with Fitzgerald Avenue".
A group of residents stand on River Road in Richmond. The road is badly cracked and buckled, and bas been partly blocked off with road cones and warning tape. The photographer comments, "Neighbours discussing the situation".
The former Canterbury Horse Bazaar building on Lichfield Street. One brick gable has collapsed, and there is cracking through the brickwork. A spray-painted warning on the wall below the remaining gable reads, "Danger, look up".
A photograph of the entrance to the Crowne Plaza Hotel on the corner of Kilmore and Durham Streets. The glass window to the left has been boarded up with plywood and warning tape has been draped in front.
The driveway has collapsed into a large sink hole in front of the Shirley Burger King. Warning tape cordons off the area. The photographer comments, "These photos show our old house in River Rd and recovery work around Richmond and St Albans. Shirley Burger King has driveway issues".
Damage to River Road in Richmond. The road is badly cracked and buckled, and is partly blocked off with road cones and warning tape. In the background is a truck carrying more road cones and signs. The photographer comments, "Major slumps and cracks along River Rd. Near 381 River Rd, looking towards the Banks Ave - Dallington Terrace corner".
Damage to River Road in Richmond. The road is badly cracked and has slumped towards the river. Road cones and warning tape block off the road to vehicles. The photographer comments, "The end of River Rd, at the corner of Banks Ave-McBratneys Rd-Dallington Tce. Morons in 4WDs kept wanting to drive through here".
A damaged driveway bridge over Dudley Creek has been blocked off with warning tape. The sides of the bridge have slumped, and the driveway surface has buckled and cracked. In the background, the gates to the property are misaligned. The photographer comments, "The bridge to a large mansion on a huge section was displaced by half a metre".
A damaged driveway bridge over Dudley Creek has been blocked off with warning tape. The sides of the bridge have slumped, and the driveway surface has buckled and cracked. In the background, the gates to the property are misaligned. The photographer comments, "The bridge into the mansion in Banks Avenue is as broken as the mansion itself".
A damaged driveway bridge over Dudley Creek has been blocked off with warning tape. The sides of the bridge have slumped, and the driveway surface has buckled and cracked. In the background, the gates to the property are misaligned. The photographer comments, "The bridge to a large mansion on a huge section was displaced by half a metre".
A Christchurch City Council/Canterbury District Health Board/ECan sign on a tree next to the Heathcote River reads, "Warning, contaminated water. Due to sewage overflows this water is unsafe for human contact and activity and is a public health risk. Please keep all people and pets out of contact with the water and do not consume any seafood or shellfish collected from this area.".
A photograph of a large trench at the entrance to a street in Christchurch. There is water and liquefaction in the trench. Road cones have been placed around it as a warning. In the background, two personnel from the New Zealand Army are guarding the entrance to the street. They are wearing their army uniforms and high-visibility vests.
Damage to River Road in Richmond. The road surface is badly cracked and slumped, and liquefaction silt covers part of the road. Two people in gumboots walk towards a barrier erected across the road using road cones and warning tape, and in the background the badly twisted Medway Street bridge can be seen. The photographer comments, "Longitudinal cracks indicate lateral movement as the land sagged towards the river. Near 373 River Rd, looking south-east towards Medway St. The Medway St bridge is visible in the background".
Developing a holistic understanding of social, cultural, and economic impacts of disasters can help in building disaster risk knowledge for policy making and planning. Many methods can help in developing an understanding of the impacts of a disaster, including interviews and surveys with people who have experienced disaster, which may be invasive at times and create stress for the participants to relive their experiences. In the past decade, social media, blog posts, video blogs (i.e. “vlogs”), and crowdsourcing mechanisms such as Humanitarian OpenStreetMap and Ushahidi, have become prominent platforms for people to share their experiences and impacts of an event from the ground. These platforms allow for the discovery of a range of impact information, from physical impacts, to social, cultural, and psychological impacts. It can also reveal interesting behavioural information such as their decision to heed a warning or not, as people tend to share their experiences and their reactions online. This information can help researchers and authorities understand both the impacts as well as behavioural responses to hazards, which can then shape how early warning systems are designed and delivered. It can also help to identify gaps in desired behavioural responses. This poster presents a selection of cases identified from the literature and grey literature, such as the Haiti earthquake, the Christchurch earthquake, Hurricane Sandy, and Hurricane Harvey, where online platforms were widely used during and after a disaster to document impacts, experiences, and behavioural responses. A summary of key learnings and areas for future research is provided.