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Watsisname
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24 Dec 2018 09:34

A-L-E-X wrote:
Source of the post Wat, was the Krakatoa explosion in 1883 ranked higher than Tambora's explosion in 1815 (which caused the year without a summer?) I thought in terms of VEI, there were quite a few volcanoes ranked higher than Krakatoa.

Krakatau wasn't the largest eruption for volume of ejected material, but it was the loudest explosion, or the most significant pressure wave.  It ruptured eardrums of sailors 60km away, was audible 5000km away, and the pressure wave detectable multiple times as it circled the planet.
 
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Watsisname
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26 Dec 2018 20:39

Moved some off-topic discussion to the off-topic thread.
 
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midtskogen
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11 Jan 2019 02:42

A major storm system, giving hurricane force winds in some places, has since yesterday swept over northern Norway and Svalbard.  Here in Oslo its direct effect was just some mild Foehn winds last night.  My seismometer, however, has drowned in noise from a million waves crashing into the coast a 1000 km away.  Here's about 20 hours worth of data since yesterday:

seismo-20190111.png


There's a lot of energy in big storms.  This one could be a M6 quake in terms of energy.
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A-L-E-X
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11 Jan 2019 02:57

No measurable snow here since the middle of November (so about 60 days or 2 months) which is pretty unusual but that pattern looks to change around Jan 20.  I just hope that big lunar eclipse on that night doesn't get interfered with by the weather here!

I wonder how that volcanic eruption might affect the weather or climate for the next year or two going forward?  And even the color and brightness of the lunar eclipse(s)!  I remember an exceptionally dark lunar eclipse after a volcanic eruption where the moon actually appeared to be darker than the sky (because the sky was light polluted) the moon actually looked like a black hole in the sky!
 
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Watsisname
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18 Jan 2019 05:38

midtskogen wrote:
Source of the post My seismometer, however, has drowned in noise from a million waves crashing into the coast a 1000 km away.

Wow!  This also really puts into perspective the challenges for the LIGO gravitational wave detector here in Washington.  If I recall right, they simply don't bother observing whenever there's a cyclone hitting the west coast. Wrong kind of waves. :)
 
A-L-E-X
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18 Jan 2019 05:52

https://www.bostonglobe.com/news/nation ... story.html

Let's see if that kind of extreme cold and snowy pattern actually happens- first up- we are going to get hit with the storm that was burying the Sierra in feet of snow the last few days.
 
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midtskogen
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18 Jan 2019 14:12

Watsisname wrote:
Source of the post This also really puts into perspective the challenges for the LIGO gravitational wave detector here in Washington.

Such waves are likely a serious issue.  I was seeing ground movement of about 20-30 µm, and that might be a few orders of magnitude more than what LIGO detects.

34 m/s sustained 10 minute average winds, gusting to 45 m/s, were measured in Svalbard, and similar speeds in mainland Norway 1000 km further south.  Such winds are not uncommon, but this storm hit a large area geographically, which could explain the extreme seismic noise.  Even the beginning of the plot was a bit noisy, but I didn't extend the plot to the day before, because then it was windy in Oslo and I got noise from the shaking of my house.
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A-L-E-X
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19 Jan 2019 01:45

Is that what is known as a Seiche? I see one was reported on the Great Lakes with this big storm that is incoming and we had one there during Sandy too, along with a storm surge.

Sandy is considered the largest cyclone by areal extent (and also by release of energy) in the Atlantic since such measurements started being made.
 
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midtskogen
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31 Jan 2019 11:18

Somewhere in Minnesota...
x.jpg
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Stellarator
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31 Jan 2019 20:53

If anyone lives in the regions of North America effected by this extreme cold-snap (Eastern/Central Canada and the Eastern States) nd the thermometer reads below -35o with wind-chill, do this experiment: Take a glass of water to a high spot (second-story balcony or roof will do) and toss the water in the air. You'd be surprised what happens next.

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midtskogen
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31 Jan 2019 21:21

Wind chill doesn't really help much for the boiling water trick. It's the actual temperature that matters. And it already works in -15C and colder.

People in the US has this obsession with wind chill.  Yes, wind chill makes cold weather extremely dangerous if you walk outside naked, but who does.  It's just a matter of covering the entire body in windproof clothing.
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31 Jan 2019 23:49

midtskogen wrote:
Source of the post People in the US has this obsession with wind chill.  Yes, wind chill makes cold weather extremely dangerous if you walk outside naked, but who does.

Yeah, I noticed that too. It doesn't indicate absolute air temperature - but rather a subjective body temperature measured against how much heat one radiates away in low-pressure cold environments.
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A-L-E-X
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02 Feb 2019 04:22

I even heard TV meteorologists say they should do away with temperatures and only report "real feel" temps because thats what it "feels like" ugh
 
vlad01
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02 Feb 2019 16:42

midtskogen wrote:
Somewhere in Minnesota...
x.jpg

Turn that upside down, here in Australia that would be about right haha.
 
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08 Feb 2019 01:08

'Historic' flooding in NW Australia.




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