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آخرينبعدي
  1396/08/24
   A Closer Look at an Undersea Source of Alaskan Earthquakes
  NGDIR News Section-- A systematic survey offers a striking portrait of movement along a 500-kilometer-long undersea section of the Queen Charlotte-Fairweather fault off the coast of southeastern Alaska. During the past century, movement along the Queen Charlotte-Fairweather fault, which lies for most of its length beneath the waters off southeastern Alaska and British Columbia, has generated at least seven earthquakes of magnitude 7 or greater. This includes a magnitude 8.1 earthquake in 1949.....[More]
  1396/08/22
   More than 210 killed by earthquake in Iran-Iraq border region
  NGDIR News Section-- Rescuers battle to find survivors trapped under collapsed buildings after the 7.3 magnitude quake. More than 210 people have been killed in Iran and Iraq after a magnitude 7.3 earthquake hit the border region between the two countries, state media said. At least 207 people have died in Iran, a spokesman for the country's disaster agency state television, after the powerful quake struck the country's western provinces at 9.20pm local time on Sunday. More than 1,700 were.....[More]
  1396/08/15
   Four systems out there and hurricane season hasn't even hit its peak yet
  NGDIR News Section-- Buckle your seat belts. Traffic is piling up in hurricane alley. This week, the Atlantic got busy with Tropical Storm Harvey and two waves churning westward as Hurricane Gert, which formed last week, disappeared into the North Atlantic. Warnings and watches were up across the Windward Islands as parts braced for Harvey, the ninth tropical cyclone of the season. While none of the current systems appears likely to intensify into major hurricanes, forecasters on Friday ga.....[More]
  1396/08/13
   NASA Flights Gauge Summer Sea Ice Melt in the Arctic
  NGDIR News Section-- Earlier this year Arctic sea ice sank to a record low wintertime extent for the third straight year. Now NASA is flying a set of instruments north of Greenland to observe the impact of the melt season on the Arctic's oldest and thickest sea ice. Operation IceBridge, NASA's airborne survey of polar ice, launched a short campaign on July 17 from Thule Air Base, in northwest Greenland. Weather permitting, the IceBridge scientists are expecting to complete six, 4-hour-long fl.....[More]
  1396/08/10
   Indonesian Cave Reveals Nearly 5,000 Years of Tsunamis
  NGDIR News Section-- Researchers explore a coastal cave containing layers of sand deposited by 11 prehistoric tsunamis and demonstrate that the time period between massive waves is highly variable. The cave didn't look that promising from the outside, Charlie Rubin remembers. But when the earthquake geologist and his colleagues walked in and started digging, "our jaws dropped," he said. The researchers noticed that a depression in the floor of the cave-near Banda Aceh, Indonesia-contained dis.....[More]
  1396/08/08
   Down to Earth With: Cave microbiologist Hazel Barton
  NGDIR News Section-- In the early 1990s, when Hazel Barton was pursuing her doctorate in medical microbiology at the University of Colorado Health Sciences Center in Denver, she enjoyed exploring caves as a hobby. She never imagined that she would one day incorporate caving into her career. Now a professor and director of the Integrated Bioscience Program at the University of Akron in Ohio, Barton examines how microbial life drives cave formation, and how it survives in isolated and nutrient-.....[More]
  1396/07/29
   When a big earthquake hits, your first instinct can mean life or death
  NGDIR News Section-- What should be done when an earthquake hits? Run outside? Or drop, cover and hold on? It's a question that many instantly must make a reaction to when an earthquake strikes. Californians born in this state might instinctively drop under a table, cover their head and hold tight. Out-of-staters might feel an urge to flee out the door. As Californians heard as they participated in the global ShakeOut drill at 10:19 a.m. Thursday, a common refrain for many in the United St.....[More]
  1396/07/26
   What Caused the Ongoing Flooding on Lake Ontario?
  NGDIR News Section-- The floodwaters have also affected residents downstream along the Saint Lawrence River. Although politicians quickly blamed regulations, scientists say it was a perfect storm of natural factors. Since April, floodwaters along the shores of Lake Ontario have closed roads, inundated homes, and destroyed break walls. Shore-bound residents have watched the lake rise almost a meter above its normal levels, eroding away shorelines and threatening homes. Lake Ontario stretche.....[More]
  1396/07/24
   Short Rains and Long Rains
  NGDIR News Section-- A recent paper in Reviews of Geophysics examined the drivers of interannual and regional rainfall variability in eastern Africa. We tend to hear about the climate of eastern Africa when it makes the news headlines, either for a severe drought or floods, both of which can be devastating for local populations, their crops and wildlife. A recent review article published in Reviews of Geophysics gave an overview of the current state of knowledge on the region's rainfall regim.....[More]
  1396/07/23
   New Study Shows the Amazon Makes Its Own Rainy Season
  NGDIR News Section-- A new study gives the first observational evidence that the southern Amazon rainforest triggers its own rainy season using water vapor from plant leaves. The finding helps explain why deforestation in this region is linked with reduced rainfall. The study analyzed water vapor data from NASA's Tropospheric Emission Spectrometer (TES) on the Aura satellite, along with other satellite measurements, to show that at the end of the dry season, clouds that build over the souther.....[More]
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