United States
Nine Missing After Avalanche
Nine skiers remain missing after six were rescued following an avalanche near Lake Tahoe in Northern California. A group of fifteen skiers was returning from a three-day backcountry skiing trip on Tuesday morning when they were overtaken by the avalanche on Castle Peak, which is north of Tahoe’s ski resorts. The six rescued skiers reportedly sheltered near the avalanche site and communicated with rescue teams via emergency beacon and satellite messaging until they were retrieved. The nine missing skiers are in danger of physical trauma and suffocation from the force of avalanche debris. Rescue efforts are hindered by blizzard conditions and the possibility of triggering further ice slides, as an avalanche danger warning has been issued by the Tahoe region authority since the disaster.
This map depicts the avalanche risk zone in the Lake Tahoe region of Northern California. Click on the map to learn more.
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Israel-Palestine
Israel Expands West Bank Control
Israel’s government is taking steps to consolidate control over much of the West Bank, which it has occupied since 1967, even though Israel has not officially declared annexation of the area. On Sunday, the government approved new measures including shifting some powers from military authorities to civilian government control, supporting settlement expansion, and changing land registration and planning policies. Most of these changes are occurring in Area C, which represents 60% of the West Bank and is already under Israeli control. The West Bank is among the territories that Palestinians seek as part of a future independent state, with Areas A and B of the West Bank currently under full or partial Palestinian Authority (PA) administration. Across the West Bank, signs of growing Israeli presence are increasingly visible, including more Israeli flags and symbols along roadsides and fewer Palestinians present in some open areas.
This map depicts the West Bank’s division of administrative control. Click on the map to learn more.
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Graphic Source: El País
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Antarctica
23 Million Years of Climate History
A team of researchers on the West Antarctic Ice Sheet has retrieved a new record sediment core, providing insights into millions of years of climate history. The SWAIS2C (Sensitivity of the West Antarctic Ice Sheet to 2°C) international team drilled through 1716 feet (523 m) of ice to collect a 748-foot (228 m) sediment core, the longest ever, from under the Ross Ice Shelf at Crary Ice Rise (CIR) on the edge of the West Antarctic Ice Sheet. The history contained in the core is a comprehensive record of how this part of the ice sheet has behaved during past periods of warming and cooling, and can help climate scientists forecast the future of the ice sheet in our warming world. The team discovered a lot of variability, with some sediment typical of deposits that occur under an ice sheet, and some material more typical of an open ocean or an ice shelf floating over an ocean and icebergs calving off. The West Antarctic Ice Sheet is calculated to hold enough ice that if it completely melted, it would raise global sea levels by 13-16 feet (4–5 m).
This map depicts the location of the drill site on the Ross Ice Shelf where the longest-ever sediment core was retrieved. Click on the map to learn more.
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Q: The Argentina–Brazil border runs through the Devil’s Throat canyon, which is part of which waterfall system?
A: Iguazú (Iguaçu) Falls
Iguazú (Iguaçu) Falls are waterfalls of the Iguazú (Iguaçu) River on the border of the Argentine province of Misiones and the Brazilian state of Paraná. Together, they make up the largest waterfall system in the world. The falls divide the river into the upper and lower Iguazu. The Iguazú River rises near the heart of the city of Curitiba. For most of its course, the river flows through Brazil; however, most of the falls are on the Argentine side. About half of the river’s flow falls into a long and narrow chasm called the Devil’s Throat (Garganta del Diablo in Spanish or Garganta do Diabo in Portuguese). The Devil’s Throat canyon is 260–300 ft (80–90 m) wide and 230–260 ft (70–80 m) deep.
Source
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Q: What country is home to the world’s largest artificial lake?
Stay tuned for the answer to today’s question in tomorrow’s DailyGeo.
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