Earthquakes and tsunamis - EdexcelPredict, protect and prepare for earthquakes
Earthquakes are caused by the release of built-up pressure at plate boundaries. They can destroy buildings and infrastructure. Tsunamis can also occur, with equally devastating and deadly effects.
Prediction, protection and preparation for earthquakes
Prediction
Prediction involves using seismometerA machine that detects seismic waves caused by earthquakes. to monitor Earth tremors. Experts know where earthquakes are likely to happen. However, it is very difficult to predict when they will happen. Even looking at the timescale between earthquakes doesn't seem to work.
Protection
Many areas prone to earthquake hazards now use building codes. Any new building or adjustment to existing buildings must be carried out to strict guidelines to help protect people from future earthquake hazards. Protection involves constructing buildings so that they are safe to live in and will not collapse. Some examples of building improvements are:
rubber shock absorbers in the foundations to absorb the Earth tremors
steel frames that can sway during Earth movements
open areas outside of the buildings where people can assemble during an evacuation
low-cost methods such as wire mesh retrofitTo add a component or an upgrade to something that didn鈥檛 exist at the time it was made. are used in rural areas and low income countries (LICS) - these are affordable and appropriate to the resources and people living there
Lightweight roofs designed to reduce damage and injury
Preparation
In earthquake-prone countries, hospitals, emergency services and residents practise for an earthquake. They have drills in all public buildings so that people know what to do in the event of an earthquake. This helps to reduce the impact and increases their chance of survival.