HAZARDS

hazards

A L'Aquila trigger, seismic gaps and poor construction: What we've learned from the August earthquake in Italy

Seismologists examine what happened during the Aug. 24 earthquake in Rieti and discuss what those findings might mean for the future of this seismically active region. 
20 Nov 2016

Benchmarks: November 13, 1985: Nevado del Ruiz eruption triggers deadly lahars

On Nov. 13, 1985, at a little after 9 p.m. local time, Nevado del Ruiz, a volcano about 130 kilometers from Colombia’s capital city of Bogotá, erupted, spewing a violent mix of hot ash and lava into the atmosphere. Less than three hours later, the earth rumbled as mudflows towering nearly 30 meters high swept through the countryside, several villages and eventually the town of Armero, where it killed 70 percent of the town’s residents. All-told, these mudflows, called lahars, killed more than 23,000 people.

13 Nov 2016

NYC pigeons are canaries of lead poisoning

New research suggests that pigeons might prove useful for tracking high lead levels in cities. “Pigeons breathe the same air, walk the same sidewalks, and often eat the same food as we do. What if we could use them to monitor possible dangers to our health in the environment, like lead pollution?” said Rebecca Calisi of the University of California, Davis, in a statement.

20 Oct 2016

Scientists get rare opportunity to monitor caldera collapse in real time

Many of the most catastrophic volcanic eruptions in history have something in common: caldera collapse — the formation of a large hole by the collapse of a volcano’s peak associated with the emptying of the magma chamber. But these events are rare. So, in August 2014, when Bárdarbunga Volcano in central Iceland erupted, it gave scientists the unique opportunity to study a caldera collapse in real time.

17 Oct 2016

Everything's bigger in Texas, including the Wink sinkholes

Residents of the neighboring West Texas towns of Wink (population 940) and Kermit (population 6,000) have had decades to get used to a pair of large sinkholes that opened a couple of kilometers apart between their towns, the first in 1980 and the second in 2002. But according to a new study, the ground around the two holes is subsiding and unstable, opening up the possibility that they could collapse into one giant sinkhole.

10 Oct 2016

Lack of afterslip in Nepal hints at mounting tensions

On April 25, 2015, a magnitude-7.8 earthquake struck Nepal, northwest of Kathmandu, damaging much of the capital city, flattening surrounding villages and killing more than 8,000 people. The quake’s hypocenter was relatively shallow, only 15 kilometers below ground on a fault that’s part of the Main Himalayan Thrust. Yet the displacement didn’t rupture all the way to the surface, indicating that only part of the fault slipped. Now, in a new study looking at how the fault continued to move following the 2015 event, researchers have found that the shallower section of the fault is likely still locked — and potentially loaded for another earthquake.

02 Oct 2016

Kilauea increases asthma risk

Kilauea may be best known for its picturesque red lava flowing into the ocean, but new research presented this week at the Geological Society of America annual meeting in Denver, Colo., suggests that locally, the volcano may be known for something more dangerous: asthma. The new study links gaseous eruptions from the Hawaiian volcano to increased asthma risk for those living downwind, especially children.

 
28 Sep 2016

Benchmarks: September 8, 1900: Massive hurricane strikes Galveston, Texas

Everyone said it couldn’t happen. City leaders saw no need for an expensive seawall, trusting local meteorologist Isaac Cline when he claimed that it was “impossible for any cyclone to ... materially injure the city.” And so, on the morning of Sept. 8, 1900, when the skies over Galveston, Texas, darkened with rain and the winds blew strong, residents of this booming barrier island community believed their city could weather any storm. By the next morning, the city lay in ruin, blasted by a Category-4 hurricane that killed an estimated 10,000 people — a quarter of the island’s population — and more than the combined death tolls of all other landfalling U.S. hurricanes since.

08 Sep 2016

Peeling North American Plate causing East Coast earthquakes

On Aug. 23, 2011, a magnitude-5.8 earthquake struck near Mineral, Va., shaking the Piedmont region and damaging several historic buildings in Washington, D.C. The quake caught many people by surprise because the eastern U.S. lies in the interior of the North American Plate, more than 1,500 kilometers from the nearest plate boundary. In a new study, researchers peering beneath the southeastern portion of the North American Plate may have found an explanation for why parts of the region experience more quakes than expected.

31 Aug 2016

Firefighting gets a leg up from earthquake sensor networks

Seismic networks monitor ground motion in earthquake-prone regions like California and Nevada. Now, they may also help combat other natural hazards like wildfires, which are especially common in drought-stricken western states where parched landscapes create ideal conditions for fires to spread.

19 Aug 2016

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