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Peru
Landslide Buries 60 Homes
An estimated 60 to 80 homes in the town of Retamas were buried when part of a hill in Northern Peru collapsed on Tuesday. The number of casualties from the disaster are still unknown, but dozens of people were trapped in the homes when the landslide fell. The slide occurred about 8:30am local time and is believed to be the result of heavy rain in the La Libertad region. Peru has high rates of unregulated housing, with homes often built on the edges of rivers or on the side of dangerous hills that are prone to landslides. President Pedro Castillo has pledged the government’s aid to help other people trapped in Retamas.
This map depicts the town of Retamas where a landslide occurred yesterday in Peru. Click on the map to learn more.
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Graphic Source: Barron’s
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United States
Locking in Daylight Saving Time
The United States Senate unaninmously approved the "Sunshine Protection Act" on Tuesday that would establish Daylight Saving Time as the standard for timekeeping across the United States throughout the year. If the Senate plan is approved by the House of Representatives and President Joseph Biden, the change would take effect after the scheduled time change in March 2023 and Americans would never again change their clocks on the usual twice-yearly rotation. Supporters of the plan note the uptick in auto accidents and negative health effects across the population following time changes, and that locking in Daylight Saving Time would keep sunset times an hour later during the winter.
This interactive map allows users to determine the relative allotments of useful sunlight for any locale in the United States based on whether Standard Time or Daylight Saving Time is in effect. Click on the map to learn more.
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World
"Blobs" Below Earth's Crust
A new study in the journal Nature Geoscience investigating two enormous masses deep below the Earth's crust has yielded data about their relative sizes and indicates the mass beneath Africa may be slowly rising to the surface. The continent-sized rock blobs, known as Large Low-Shear-Velocity Provinces (LLSVPs), are situated above the outer core and between 400-1600 miles (600-2600 km) below the planet's exterior. Arizona State scientists used seismic analysis and mantle convection simulations in the study, finding the mass under Africa to be larger and closer to the surface than its counterpart under the Pacific Ocean, but far less dense and therefore less stable and likely formed more recently. These rock masses are understood to have effects on tectonic movement, earthquakes and volcanism at the surface.
This map depicts a 3D model of rock blobs beneath Earth's mantle below Africa. Click on the map to learn more.
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Q: Smaller than the state of Massachusetts, and known as the "Land of Volcanoes," which Central American country is the only one to not have a coastline on the Caribbean Sea?
A: El Salvador
Bounded by Guatemala to the west and Honduras to the north and east, El Salvador’s coast is only on the Pacific Ocean. Along with much of Central America, El Salvador is located in one of the most seismologically active regions in the world. While the Caribbean Plate is mostly sedentary, the constantly moving Pacific Ocean floor is carried by the Cocos Plate northeastward, creating a deep trench off the coast of El Salvador. The frequency of earthquakes near the coast is caused by this subduction process. The country has over twenty volcanoes and rich volcanic soil, with much of El Salvador’s coffee crops planted on the slopes of these volcanoes.
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Q: In which unique European border town can visitors enter a cafe in one country, and sip their coffee in another country just a few steps away?
Stay tuned for the answer to today's question in tomorrow's DailyGeo.
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