mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Science & Technology

Reply
 
Thread Tools
Old 2021-08-15, 01:08   #496
Dr Sardonicus
 
Dr Sardonicus's Avatar
 
Feb 2017
Nowhere

2×3×23×37 Posts
Default

There was a three-part series about Haiti in The New Yorker (November 27, December 4, and December 11, 1989) entitled "Beyond the Mountains." Very depressing reading.

From history classes and subsequent reading many years later, I remember that Haiti's successful revolt against the French was what led Napoleon Bonaparte to sell the French Louisiana Territory to the United States. He was preparing to go to war against the rest if Europe, and figured that if 20,000 soldiers couldn't hold onto tiny Haiti, holding the vast Louisiana Territory was incompatible with his program of conquest in Europe.

If there's a country other than Haiti that's been forced to pay indemnities for a war it won, I am not aware of it.

In recent weeks, I heard someone talking on the radio about Haiti's revolution and abolition of slavery as its "Black Lives Matter" event. I rolled my eyes, because the person ignored the Dessalines massacre after the French military left.
Dr Sardonicus is offline   Reply With Quote
Old 2021-08-15, 01:58   #497
chalsall
If I May
 
chalsall's Avatar
 
"Chris Halsall"
Sep 2002
Barbados

10,039 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
I rolled my eyes, because the person ignored the Dessalines massacre after the French military left.
Thanks for raising that very sad prior example of human behavior.

Frankly, Afghanistan scares the hell out of me! How could this have been allowed to happen???

The "energy" will be reverberating for generations. I see no long-term upside; no matter how dark the lens.
chalsall is offline   Reply With Quote
Old 2021-09-15, 13:42   #498
xilman
Bamboozled!
 
xilman's Avatar
 
"π’‰Ίπ’ŒŒπ’‡·π’†·π’€­"
May 2003
Down not across

101011000011112 Posts
Default

A whole bunch of earthquakes is occurring about 10km south of here. We had some last year but what is unusual about these is that their number (hundreds), strength (several above Richter 3) and shallow depth (3-1km).

TPTB have raised the eruption alert level to yellow (amarillo, actually, because we live a Spanish-speaking area) and the usual mega-tsunami BS is being dusted off all over the interweb thingy.

https://eldiario.es/canariasahora/la...1_8303469.html
and
https://youtube.com/watch?v=DsuDrx6yaJI
and
https://youtube.com/watch?v=LKTucvy-...icReversalNews

for some of the stuff I mean.

Last fiddled with by xilman on 2021-09-15 at 17:58 Reason: s/TBTB/TPTB/
xilman is offline   Reply With Quote
Old 2021-09-15, 14:09   #499
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101Γ—103 Posts

24×631 Posts
Default

Quote:
Originally Posted by xilman View Post
A whole bunch of earthquakes is occurring about 10km south of here.
I just searched the IGN data and there have been 924 earthquakes on and around the island, since 6 Sept, and at or above Mag 1.0
Only 2 of those were before the 11th.

Has this had an effect on your celestial work?

Last fiddled with by Uncwilly on 2021-09-15 at 14:20
Uncwilly is offline   Reply With Quote
Old 2021-09-15, 15:07   #500
Dr Sardonicus
 
Dr Sardonicus's Avatar
 
Feb 2017
Nowhere

2·3·23·37 Posts
Default

La Palma, Canary Islands: seismic crisis Sep 2021 - updates
Quote:
The volcanic-seismic crisis continues to evolve. During the past 24 hours, earthquakes have been moving westwards and become shallower, the National Geographic Institute (IGN) reported.

This is likely reflecting continued magma intrusion and migration under the surface, supported also by continued deformation of the surface in the same area as the quakes. In places, the ground has been uplifted by 1.5 cm (almost one inch) already.
<snip>
Hmm, I wonder of that should be 2.5 cm, since 1.5 cm is just under 5/8 of an inch, and 2.5 cm really is "almost 1 inch," which is 2.54 cm.
Quote:
The strong earthquake swarm is continuing beneath Cumbre Vieja, and now PEVOLCA has raised the alert level to Yellow, citing the repeated occurance of earthquake swarms since 2017, with this one being the strongest and also the shallowest, suggesting magma is slowly rising into the edifice. Measurements of Helium-3 gas flux are also indicating this.
<snip>
Helium-3? Why Helium-3 specifically? I could understand Helium-4 being present. Uranium (over 99% being U-238) is a common constituent of rocks. U-238 undergoes radioactive decay by emitting an alpha particle, and alpha particlesa are Helium-4 nuclei.
Dr Sardonicus is offline   Reply With Quote
Old 2021-09-15, 15:24   #501
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101Γ—103 Posts

235608 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
La Palma, Canary Islands: seismic crisis Sep 2021
I ran across that site and quickly understood it to be a volcano travel package promotion site. The use of the word "crisis" and their lame units approximation (closer to 1/2 inch) were indicators that they are trying to sensationalize it. Yes, it is noteworthy, but as xilman pointed out, no need to hype it beyond measure.
Uncwilly is offline   Reply With Quote
Old 2021-09-15, 15:44   #502
chris2be8
 
chris2be8's Avatar
 
Sep 2009

22×32×61 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
Helium-3? Why Helium-3 specifically? I could understand Helium-4 being present. Uranium (over 99% being U-238) is a common constituent of rocks. U-238 undergoes radioactive decay by emitting an alpha particle, and alpha particlesa are Helium-4 nuclei.
I *think* it's because helium-3 will be primeval gas incorporated into the earth when it formed. Most of the helium-3 in the crust will have escaped by now. So significant emissions show that magma from deep inside the earth is approaching the surface.

Since helium-4 is produced in the crust now increased emissions don't tell you much about where it's coming from.
chris2be8 is offline   Reply With Quote
Old 2021-09-15, 16:42   #503
Dr Sardonicus
 
Dr Sardonicus's Avatar
 
Feb 2017
Nowhere

510610 Posts
Default

Quote:
Originally Posted by Uncwilly View Post
I ran across that site and quickly understood it to be a volcano travel package promotion site.
Hmm, so it is. I guess I hit the saturation point with the information on the volcano, and didn't pay much attention to the margins. Still, plenty of actual info there.

Exaggerating the danger as a tourist draw seems strange to me, but I'd be happy to supply some free ad copy...

ONCE IN A LIFETIME ADVENTURES BECKON!!!
  • A swim in a lava lake is sure to relieve aching joints!
  • Watch incandescent rock "bombs" land all around you!
  • Experience the thrill of watching a pyroclastic flow head straight at you!

Last fiddled with by Dr Sardonicus on 2021-09-15 at 16:43 Reason: xingif topsy
Dr Sardonicus is offline   Reply With Quote
Old 2021-09-15, 17:50   #504
xilman
Bamboozled!
 
xilman's Avatar
 
"π’‰Ίπ’ŒŒπ’‡·π’†·π’€­"
May 2003
Down not across

73×151 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
La Palma, Canary Islands: seismic crisis Sep 2021 - updatesHmm, I wonder of that should be 2.5 cm, since 1.5 cm is just under 5/8 of an inch, and 2.5 cm really is "almost 1 inch," which is 2.54 cm.
Helium-3? Why Helium-3 specifically? I could understand Helium-4 being present. Uranium (over 99% being U-238) is a common constituent of rocks. U-238 undergoes radioactive decay by emitting an alpha particle, and alpha particlesa are Helium-4 nuclei.
Now 6cm according to the latest reports. This is really starting to become rather significant.

For those residing in the North American Colonies: 6cm is well over 2 inches.
xilman is offline   Reply With Quote
Old 2021-09-15, 17:56   #505
xilman
Bamboozled!
 
xilman's Avatar
 
"π’‰Ίπ’ŒŒπ’‡·π’†·π’€­"
May 2003
Down not across

101011000011112 Posts
Default

Quote:
Originally Posted by Uncwilly View Post
I just searched the IGN data and there have been 924 earthquakes on and around the island, since 6 Sept, and at or above Mag 1.0
Only 2 of those were before the 11th.

Has this had an effect on your celestial work?
Not in the slightest. We didn't feel even the strongest tremor.

Clouds are the limiting factor (hærfest is icumen in), not ground movements.

The situation may change during the final week of our current visit.
xilman is offline   Reply With Quote
Old 2021-09-16, 01:03   #506
Dr Sardonicus
 
Dr Sardonicus's Avatar
 
Feb 2017
Nowhere

2×3×23×37 Posts
Default

Quote:
Originally Posted by xilman View Post
Not in the slightest. We didn't feel even the strongest tremor.

Clouds are the limiting factor (hærfest is icumen in), not ground movements.

The situation may change during the final week of our current visit.
Here's hoping the volcano doesn't get too active too soon.

I note there has also been a recent "earthquake swarm" at Hawaii's Kilauea volcano with tremors of magnitude 3 or less. Kilauea has been on an extended nap after erupting from 1983 to 2018.

My vague recollection of previous "earthquake swarms" caused by rising magma is, when the magma starts getting close to the surface, the quakes tend to get stronger.

Another indicator of a volcano "waking up" is increased emission of gases like SO2. Such emissions can combine with humidity in the air to form "vog," which might further impede visibility.
Dr Sardonicus is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Catastrophic hardware failure CuriousKit Hardware 6 2015-09-02 18:58
Central VA Earthquake Christenson Lounge 12 2011-11-04 12:37
Beers in London September 1st, 2010 wblipp Lounge 17 2010-09-03 07:39
Strong Earthquake (M 8.8) + Tsunami in Chile Andi47 Lounge 1 2010-02-27 22:30
Cycle lane v Earthquake davieddy Soap Box 15 2008-08-15 17:15

All times are UTC. The time now is 21:12.


Sat Nov 27 21:12:52 UTC 2021 up 127 days, 15:41, 0 users, load averages: 1.03, 1.13, 1.15

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.