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Nearly 100 earthquakes swarm Yellowstone in 24 hours. Here’s what experts are saying
A swarm of 91 earthquakes rattled the Yellowstone National Park region in just 24 hours on Thursday, according to the United States Geological Survey. The quakes trembled southwest of Yellowstone Lake between Heart Lake and West Thumb.
Although the area is one of the most seismically active regions in the U.S., the cluster of quakes “is on the large side in terms of number and magnitude, but nowhere near the largest,” Michael Poland, scientist-in-charge at the Yellowstone Volcano Observatory, told McClatchy News in an email.
“Yellowstone has had swarms that include many hundreds of earthquakes in a day,” Poland said. “For example, there was a 3-month-long swarm that occurred in June-September 2017 with 2,400 located earthquakes and maximum [magnitude] 4.4.”
The recent cluster of quakes didn’t pass 3.0 magnitude. The biggest temblor was recorded at 2.8 magnitude, while the weakest was measured at 0.1 magnitude…
La Niña has arrived. Here’s what it could mean for you
La Niña is here, which could mean a cold and stormier winter than normal across the North, while the southern tier stays drier, with warmer than average temperatures.
The National Oceanic and Atmospheric Administration announced Thursday the arrival of La Niña, advising that conditions are expected to last through the Northern Hemisphere winter.
La Niña, the counterpart of El Niño, is characterized by below-normal sea surface temperatures in the Pacific Ocean near the equator — a result of shifting wind patterns in the atmosphere. Both La Niña and El Niño occur every three to five years on average, according to NOAA.
La Niña’s arrival could impact weather around the globe, potentially causing more frequent and stronger hurricanes for the last few months of the Atlantic hurricane season. It also can mean wetter conditions for northern Australia, Indonesia and the Philippines, drier conditions for western South America and cooler conditions for western Africa.
NOAA issued a La Niña watch in July, warning that La Niña could form in the fall. The agency factored in the likelihood of La Niña forming in its outlook on the 2020 hurricane season, forecasting last month that it would be “extremely active.” La Niña weakens winds between the ocean surface and the upper levels of the atmosphere…