In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.

WASHINGTON (AP) — A new federal earthquake map dials up the shaking hazard just a bit for about one-third of the United States and lowers it for one-tenth. 
  
 This undated handout image provided by the US Geological Survey (USGS) shows an updated federal earthquake risk map. A new map dials up the shaking hazard just a bit for about half of the US and lowers... (Associated Press) 
  
 FILE - This Aug. 23, 2011 file photo shows office workers gathering on the sidewalk in downtown Washington after a 5.9 magnitude tremor shook the nation's capitol. The earthquake centered northwest of... (Associated Press) 
  
 This undated handout image provided by the US Geological Survey (USGS) shows where the earthquake hazard increased and decreased from 2008. Red/brown increased. Blue decreased. A new federal earthquake... (Associated Press) 
  
 The U.S. Geological Survey on Thursday updated its national seismic hazard maps for the first time since 2008, taking into account research from the devastating 2011 earthquake and tsunami off the Japanese coast and the surprise 2011 Virginia temblor. 
  
 The maps are used for building codes and insurance purposes and they calculate just how much shaking an area probably will have in the biggest quake likely over a building's lifetime. 
  
 The highest risk places have a 2 percent chance of experiencing "very intense shaking" over a 50-year lifespan, USGS project chief Mark Petersen said. Those with lower hazard ratings would experience less intense swaying measured in gravitational force. 
  
 "These maps are refining our views of what the actual shaking is," Petersen said. "Almost any place in the United States can have an earthquake." 
  
 Parts of 16 states have the highest risk for earthquakes: Alaska, Hawaii, California, Oregon, Washington, Nevada, Utah, Idaho, Montana, Wyoming, Missouri, Arkansas, Tennessee, Illinois, Kentucky and South Carolina. With the update, new high-risk areas were added to some of those states. 
  
 Also, Colorado and Oklahoma saw increased risk in some parts and moved up to the second of the seven hazard classifications, he said. 
  
 There are major faults and quake hazards along the entire west coast, with an increased concern in the Cascadia region around Oregon. Southern Alaska, the big island of Hawaii, the Missouri-Tennessee-Arkansas-Illinois New Madrid fault area and Charleston round out the biggest hazard areas. 
  
 But shaking hazards are nearly everywhere. 
  
 Much of the country west of the Rockies, along with parts of Oklahoma and Tennessee and sections of central Arkansas, northern Alabama, Georgia, South Carolina, Indiana, Illinois, Ohio, Michigan, Virginia, New York and New England saw an increase in shaking hazards for small buildings like houses. 
  
 At the same time much of North Carolina, the northern tip of South Carolina, patches of Texas, New Mexico, Oregon, Utah, Nebraska, Arkansas, Kentucky, Tennessee, Ohio, Pennsylvania and New York saw hazard levels lower slightly. And using a different type risk analysis for tall buildings the shaking hazard in New York City dropped ever so slightly, Petersen said. 
  
 Petersen said the maps sidestep the issue of earthquakes created by injections of wastewater from oil and gas drilling in Oklahoma and other states, saying those extra quakes weren't included in the analysis. So far this year, nearly 250 small to medium quakes have hit Oklahoma. 
  
 Much of the research and cataloging was done by the nuclear industry in response to the quake and tsunami that crippled Japan's Fukushima reactor. And researchers at the University of California, Berkeley came up with a better model to simulate shaking, Petersen said. 
  
 "I see it as a big improvement," said Cornell University seismologist Rowena Lohman. "They brought in more information." 
  
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 Online: 
  
 USGS map: http://pubs.usgs.gov/of/2014/1091/ 
  
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 Seth Borenstein can be followed at http://twitter.com/borenbears ||||| Image copyright AP Image caption States in the west are still most affected by seismic activity, but it's increasing in the east 
  
 A new US geological survey indicates that some parts of the US are at an increased risk of earthquakes, especially along the east coast. 
  
 New seismic hazard maps updated for the first time since 2008 show highest risk west but also increased risk east. 
  
 "The eastern US has the potential for larger and more damaging earthquakes than considered in previous maps and assessments," the report states. 
  
 The East Coast experienced one of its largest quakes for 100 years in 2011. 
  
 The 5.8 magnitude quake was centred on rural Virginia but was felt by hundreds of thousands of people, including in Washington DC. 
  
 Parts of states including Alaska, Hawaii, Oregon and California remain at the highest risk of seismic activity. 
  
 Major fault lines exist along the entire US West Coast, as well as in the Midwest near Illinois and Missouri. 
  
 Image copyright AP Image caption Washington DC was unusually shaken in 2011 
  
 "While all states have some potential for earthquakes, 42 of the 50 states have a reasonable chance of experiencing damaging ground shaking from an earthquake in 50 years," the new report finds. 
  
 "The hazard is especially high along the West Coast, intermountain west, and in several active regions of the central and eastern US." 
  
 The 16 states at highest risk are: Alaska, Arkansas, California, Hawaii, Idaho, Illinois, Kentucky, Missouri, Montana, Nevada, Oregon, South Carolina, Tennessee, Utah, Washington, and Wyoming. 
  
 Meanwhile, several states saw their risk of seismic activity lower, including Texas, Oregon, Utah and New York. 
  
 Earthquakes caused by fracking - utilising a mixture of water, sand and chemicals pumped underground at high pressure to crack open sedimentary rocks and release the fuels within - were not included in the analysis. 
  
 Several hundred earthquakes have hit Oklahoma so far this year, with fracking named a primary culprit, although the impact of fracking on earthquake risks is disputed. |||||
Earthquake Avoidance 101: Just stay away from California, right? Not so fast. An updated US Geological Survey report and accompanying hazard map confirm that the West still holds the worst potential for seismic shake-ups, with major faults and hazards creeping up the entire West Coast, reports the AP. But the USGS data ups the risk factor for quakes in the eastern and central US, citing the "potential for larger and more damaging earthquakes than considered in previous maps and assessments," according to USA Today. Included in this data was research into 2011’s magnitude-5.8 quake in Virginia and the catastrophic 2011 quake-tsunami combo off the coast of Japan, says AP. Still, "high-risk" states like Alaska, California, Nevada, Utah, Missouri, and Arkansas have only "a 2% chance of experiencing very intense shaking over a 50-year lifespan," says the USGS project chief. Quake-queasy folks seriously determined to hide from the next tremor may want to consider moving to Florida, Wisconsin, North Dakota, or Minnesota—the four states that fell in the "lowest hazard" category. The maps—which help assess risk for insurance companies and building-code purposes—didn’t figure possible fracking-related earthquakes into the mix, which may explain why Oklahoma didn’t break the top 10, notes the BBC.