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Posts Tagged ‘volcano

“A volcano may be considered as a cannon of immense size”*…

 

On August 27, 1883, the Earth let out a noise louder than any it has made since.

It was 10:02 a.m. local time when the sound emerged from the island of Krakatoa, which sits between Java and Sumatra in Indonesia. It was heard 1,300 miles away in the Andaman and Nicobar islands (“extraordinary sounds were heard, as of guns firing”); 2,000 miles away in New Guinea and Western Australia (“a series of loud reports, resembling those of artillery in a north-westerly direction”); and even 3,000 miles away in the Indian Ocean island of Rodrigues, near Mauritius (“coming from the eastward, like the distant roar of heavy guns.”). In all, it was heard by people in over 50 different geographical locations, together spanning an area covering a thirteenth of the globe.

Think, for a moment, just how crazy this is. If you’re in Boston and someone tells you that they heard a sound coming from New York City, you’re probably going to give them a funny look. But Boston is a mere 200 miles from New York. What we’re talking about here is like being in Boston and clearly hearing a noise coming from Dublin, Ireland. Traveling at the speed of sound (766 miles or 1,233 kilometers per hour), it takes a noise about four hours to cover that distance. This is the most distant sound that has ever been heard in recorded history…

More at “The Sound So Loud That It Circled the Earth Four Times.”

(And for a consideration of “the noise beneath the noise,” check out “The Noise at the Bottom of the Universe.”)

Oliver GoldsmithGoldsmith’s Miscellaneous Works (1841), 90

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As we Bring the Noise, we might that it was on this date in 2013 that the eruption of Ecuador’s Tungurahua volcano sent a massive plume of ash, stones, and vapor soaring more than eight miles into the sky above the Andes.

Pyrocumulus clouds soaring high above the Andes due to the eruption of Ecuador’s Tungurahua volcano

source

 

Written by LW

July 19, 2016 at 1:01 am

Out of harm’s way?…

The online real-estate service Trulia has crunched federal-disaster data to create a series of local maps and a collection of national maps showing the worst cities to live in for weatherphobes and quake-haters – stay out of California metropolises if you fear having your home burnt down, for instance, and Oklahoma City is a terrible place to hunker if you don’t want EF-4 twisters knocking at your door. The Trulia team warns:

Most metros were high risk for at least one of the five natural disasters [hurricanes, tornadoes, floods, forest fires and earthquakes], even though no metro area is high risk for everything. Earthquakes and wildfires tend to go hand-in-hand, with California and other parts of the West at high risk for both. Hurricanes and flooding also tend to strike the same places, particularly in Florida and along the Gulf Coast. Tornadoes affect much of the south-central U.S. What parts of the country are left? Not the Northeast coastal cities, which – as we all know after Hurricane Sandy – face hurricane and flood risk. Instead, the metros at medium-to-low risk for all five disasters span Ohio (Cleveland, Akron, and Dayton), upstate New York (Syracuse and Buffalo), and other parts of the Northeast and Midwest, away from the coasts…

Where should one head to avoid the next great storm? Here are the top 10 large housing markets in America that are most removed from “nature’s wrath,” according to the company’s risk assessment (the prices refer to the average home-asking price per square foot):

  1. Syracuse, New York* ($89)
  2. Cleveland ($80)
  3. Akron, Ohio ($81)
  4. Buffalo ($93)
  5. Bethesda-Rockville-Frederick, Maryland ($174)
  6. Dayton, Ohio ($72)
  7. Allentown, Pennsylvania-New Jersey ($109)
  8. Chicago ($113)
  9. Denver ($129)
  10. Warren-Troy-Farmington Hills, Michigan ($94)

* Syracuse: Trulia says the “data on flood risk, which comes from the Federal Emergency Management Agency [FEMA], is incomplete for Syracuse and for several other metros not on the ten lower-risk list.”

Read the whole story at “These U.S. Cities Are the Safest Refuges From Natural Disasters“; and explore the Trulia maps here.

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As we dream of Oz, we might recall that it was on this date in 1834 that Mt. Vesuvius erupted. Again.

Vesuvius famously erupted in 79 CE, destroying Pompeii and Herculaneum; but the volcano had erupted many times before, and has again, many times since.

The last major eruption was in March 1944. It destroyed the villages of San Sebastiano al Vesuvio, Massa di Somma, Ottaviano, and part of San Giorgio a Cremano.  At the time of the eruption, the United States Army Air Forces 340th Bombardment Group was based at Pompeii Airfield near Terzigno, Italy, just a few kilometers from the eastern base of the mountain. Tephra (rock fragments ejected by the eruption) and hot ash damaged the fuselages, the engines, the Plexiglas windshields, and the gun turrets of the 340th’s B-25 Mitchell bombers; estimates were that 78 to 88 aircraft were completely destroyed.

Vesuvius from Portici by Joseph Wright of Derby

source

Written by LW

August 18, 2013 at 1:01 am

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