Sep 18, 2021 01:38 AM
Giant sequoia trees wrapped in aluminum as California wildfires loom
https://www.cnet.com/news/giant-sequoia-...ires-loom/
RELEASE: Wildfires burning in California are posing a threat to giant sequoia trees in the Sierra Nevada, the Associated Press reported Friday. In an effort to protect the trees, firefighters wrapped their bases with fire-resistant aluminum blankets. They hope this will save a famous grove of sequoias from burning, including the General Sherman Tree in Sequoia National Park's Giant Forest. At 52,508 cubic feet, it's the world's largest tree by volume, according to the National Park Service.
The wrappings can handle intense heat for short periods, according to the AP, and have been used for many years to protect structures from fires in the West. Homes that used the fire-resistant wrapping near Lake Tahoe reportedly survived a recent wildfire.
The Giant Forest Museum and other buildings were also reportedly wrapped in an effort to protect against flames. The Colony Fire is expected to reach the Giant Forest sometime in the coming days. Last year's Castle Fire is estimated to have killed between 7,500 and 10,600 large sequoias, according to the National Park Service.
Do the northern lights make sounds that you can hear?
https://theconversation.com/do-the-north...ear-168032
INTRO: It’s a question that has puzzled observers for centuries: do the fantastic green and crimson light displays of the aurora borealis produce any discernible sound?
Conjured by the interaction of solar particles with gas molecules in Earth’s atmosphere, the aurora generally occurs near Earth’s poles, where the magnetic field is strongest. Reports of the aurora making a noise, however, are rare – and were historically dismissed by scientists.
But a Finnish study in 2016 claimed to have finally confirmed that the northern lights really do produce sound audible to the human ear. A recording made by one of the researchers involved in the study even claimed to have captured the sound made by the captivating lights 70 metres above ground level.
Still, the mechanism behind the sound remains somewhat mysterious, as are the conditions that must be met for the sound to be heard. My recent research takes a look over historic reports of auroral sound to understand the methods of investigating this elusive phenomenon and the process of establishing whether reported sounds were objective, illusory of imaginary... (MORE)
Clap sounds of Northern Lights? ... https://youtu.be/NRZfKqhs6rM
https://www.youtube-nocookie.com/embed/NRZfKqhs6rM
https://www.cnet.com/news/giant-sequoia-...ires-loom/
RELEASE: Wildfires burning in California are posing a threat to giant sequoia trees in the Sierra Nevada, the Associated Press reported Friday. In an effort to protect the trees, firefighters wrapped their bases with fire-resistant aluminum blankets. They hope this will save a famous grove of sequoias from burning, including the General Sherman Tree in Sequoia National Park's Giant Forest. At 52,508 cubic feet, it's the world's largest tree by volume, according to the National Park Service.
The wrappings can handle intense heat for short periods, according to the AP, and have been used for many years to protect structures from fires in the West. Homes that used the fire-resistant wrapping near Lake Tahoe reportedly survived a recent wildfire.
The Giant Forest Museum and other buildings were also reportedly wrapped in an effort to protect against flames. The Colony Fire is expected to reach the Giant Forest sometime in the coming days. Last year's Castle Fire is estimated to have killed between 7,500 and 10,600 large sequoias, according to the National Park Service.
Do the northern lights make sounds that you can hear?
https://theconversation.com/do-the-north...ear-168032
INTRO: It’s a question that has puzzled observers for centuries: do the fantastic green and crimson light displays of the aurora borealis produce any discernible sound?
Conjured by the interaction of solar particles with gas molecules in Earth’s atmosphere, the aurora generally occurs near Earth’s poles, where the magnetic field is strongest. Reports of the aurora making a noise, however, are rare – and were historically dismissed by scientists.
But a Finnish study in 2016 claimed to have finally confirmed that the northern lights really do produce sound audible to the human ear. A recording made by one of the researchers involved in the study even claimed to have captured the sound made by the captivating lights 70 metres above ground level.
Still, the mechanism behind the sound remains somewhat mysterious, as are the conditions that must be met for the sound to be heard. My recent research takes a look over historic reports of auroral sound to understand the methods of investigating this elusive phenomenon and the process of establishing whether reported sounds were objective, illusory of imaginary... (MORE)
Clap sounds of Northern Lights? ... https://youtu.be/NRZfKqhs6rM
