In some cases, waves may be up to 33 feet (10 meters) high, flooding everything in their path. Tsunami: Inland earthquakes, such as the 2001 Nisqually earthquake, will not result in tsunamis because they do not uplift the seafloor. These all affect the way the seismic waves travel through the ground. Change ), You are commenting using your Twitter account. Hazards are the natural phenomena that might impact a region, regardless of whether there is anyone around to experience them or not. Buildings can crumble or collapse, trapping people inside and burying streets in rubble. This separates the grains from each other, reducing their load bearing capacity. Earthquakes pose several hazards to our natural and built environment. So we created a quick page to help you find any of the documents we were to have uploaded on the USB stick. endstream endobj 64 0 obj <> endobj 65 0 obj <> endobj 66 0 obj <>stream / Learning Ground shaking describes the vibration of the ground during an earthquake. Near source tsunamis will allow for very little warning. Hazards are the natural phenomena that might impact a region, regardless of whether there is anyone around to experience them or not. Different parts of Cascadia will experience different hazards. For example, after the Great San Francisco Earthquake in 1906, the city burned for three days. In New Zealand there are large lakes that could be affected, for example Lakes Wakatipu and Wanaka that are near to the Alpine Fault. Seiches are like small tsunamis. In coastal areas, a powerful offshore quake could trigger a tsunami, a… Performance & security by Cloudflare, Please complete the security check to access. If a structure (a building, road, etc.) ( Log Out /  / Earthquakes For example, during the 2001 Nisqually earthquake that shook the Puget Sound region, buildings crumbled, bridge supports cracked, and more than 400 people were injured. Although earthquakes cause death and destruction through such … Most earthquake damage results from the shaking caused by seismic waves passing beneath buildings, roads, and other structures. A hazard is any source of potential damage, harm or adverse health effects on something or someone. • What are some of the hazards associated with earthquakes? / Earthquake Hazards. Learn more about earthquake hazards in your area. Landslides may result in falling rocks and debris that collide with people, buildings and vehicles. Did you pick up a CREW branded USB stick at the 2020 NEC conference in San Diego? If an earthquake generates a large enough shaking intensity, structures like buildings, bridges and dams can be severley damaged, and cliffs and sloping ground destabilised. Lateral spreading occurs where sloping ground starts to move downhill, causing cracks to open up, that are often seen along hill crests and river banks. Are volcanoes or earthquakes more dangerous? They also can block roads and disrupt utility lines. For more information, please see What are my hazards? We identified a vendor error and none of them were uploaded with our files. The type of hazard depends on the strength of seismic activity, along with such factors as local topographic and built features, subsurface geology and groundwater. A year ago today, the prime minister's chief science adviser, Sir PETER GLUCKMAN, gave the Government a briefing paper on the likely psychosocial effects of the earthquakes. Buildings can be damaged by the shaking itself or by the ground beneath them settling to a different level than it was before the earthquake (subsidence). Buildings can be damaged by the shaking itself or by the ground beneath them settling to a different level than it was before the earthquake (subsidence). Coastal areas can become permanently flooded as a result. Subsidence can also occur as ground shaking causes loose sediments to “settle’ and to lose their load bearing strength (see liquefaction, below) or to slump down sloping ground (see Landslides and Rockfalls). / Science Topics These include hazard maps at national, state and (in some cases) local scales that show the potential for ground shaking from future earthquakes. However, an offshore subduction zone earthquake or an earthquake generated somewhere else around the Pacific Ocean will generate a tsunami, which is actually a series of waves. These primary hazards often produce secondary hazards such as ruptured utility lines, hazardous spills, and fires. The second main earthquake hazard is ground displacement (ground movement) along a fault. The international workshop on "Earthquake Hazards and Mitigation" was held in Guwahati, India during 7-8 December 2007. Rockfall Impacts of the Christchurch Quake. These fires can be started by broken gas lines and power lines, or tipped over wood or coal stoves. A large earthquake will always be followed by a sequence of aftershocks. Risk can be usually be measured in dollars or fatalities, Hazard is generally measured in more physical units: energy, shaking strength, depth of water inundation, etc. Tsunamis can be tens of feet high when they hit the shore and can do enormous damage to the coastline. Groundshaking due to earthquakes destabilises cliffs and steep slopes, causing landslides and rockfalls as a significant side-effect. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. The ground firms up again after the earthquake has past and the water has settled back down to its usual place deeper in the ground. Buildings can also be damaged by strong surface waves making the ground heave and lurch. Ground Shaking Heavy rain and unconsolidated or fractured rock are exacerbating factors. Ground shaking: Ground shaking is both a hazard created by earthquakes and the trigger for other hazards such as liquefaction and landslides. Risk refers to what we stand to lose when the hazard occurs; it is what we have built that’s threatened. Earthquakes pose several hazards to our natural and built environment. Risk refers to what we stand … The aftermath of liquefaction can leave large areas covered in a deep layer of mud. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. • Your IP: 34.248.126.152 0 Secondary earthquake hazards are those that are caused by the primary hazards, and may often be more catastrophic: Fill in your details below or click an icon to log in: You are commenting using your WordPress.com account.