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Originally posted by bkaust
So why are they waiting on the waves to settle in their bunkers in Hawaii if yu55 is supposed to hit in the atlantic? (not that I believe whatsoever it will impact) just I don't understand why you'd suggest they hide when it's a different ocean.
Originally posted by bkaust
So why are they waiting on the waves to settle in their bunkers in Hawaii if yu55 is supposed to hit in the atlantic? (not that I believe whatsoever it will impact) just I don't understand why you'd suggest they hide when it's a different ocean.
Originally posted by mockrock
reply to post by mockrock
YU55 would be a global catastrophe if it hit..
"Overall, the threat from impacts is probably greater than people realize, but historically there is very little information on this, and we just have not been collecting data for all that long," Spray said. (See "100 Years After Tunguska, Earth Not Ready for Meteors.")
Density is key..
news.nationalgeographic.com...
Your Inputs:
Distance from Impact: 16.10 km ( = 10.00 miles )
Projectile diameter: 400.00 meters ( = 1310.00 feet )
Projectile Density: 800 kg/m3
Impact Velocity: 17.00 km per second ( = 10.60 miles per second )
Impact Angle: 45 degrees
Target Density: 1000 kg/m3
Target Type: Liquid water of depth 2.0 km ( = 1.2 miles ), over crystalline rock.
Energy:
Energy before atmospheric entry: 3.87 x 1018 Joules = 9.25 x 102 MegaTons TNT
The average interval between impacts of this size somewhere on Earth during the last 4 billion years is 6.5 x 104years
Major Global Changes:
The Earth is not strongly disturbed by the impact and loses negligible mass.
The impact does not make a noticeable change in the tilt of Earth's axis (< 5 hundreths of a degree).
The impact does not shift the Earth's orbit noticeably.
Atmospheric Entry:
The projectile begins to breakup at an altitude of 84500 meters = 277000 ft
The projectile reaches the ground in a broken condition. The mass of projectile strikes the surface at velocity 13.1 km/s = 8.12 miles/s
The impact energy is 2.29 x 1018 Joules = 5.48 x 102MegaTons.
The broken projectile fragments strike the ground in an ellipse of dimension 1.69 km by 1.19 km
Crater Dimensions:
What does this mean?
The crater opened in the water has a diameter of 4.74 km ( = 2.94 miles ).
For the crater formed in the seafloor:
The result of the impact is a crater field, not a single crater. The following dimensions are for the crater produced by the largest fragment.
Transient Crater Diameter: 8.68 meters ( = 28.5 feet )
Transient Crater Depth: 3.07 meters ( = 10.1 feet )
Final Crater Diameter: 10.9 meters ( = 35.6 feet )
Final Crater Depth: 2.31 meters ( = 7.58 feet )
The crater formed is a simple crater
The floor of the crater is underlain by a lens of broken rock debris (breccia) with a maximum thickness of 1.07 meters ( = 3.51 feet ).
The volume of the target melted or vaporized is 0.00115 m3 = 0.0405 feet3
Roughly half the melt remains in the crater
Thermal Radiation:
What does this mean?
At this impact velocity ( < 15 km/s), little vaporization occurs; no fireball is created, therefore, there is no thermal radiation damage.
Seismic Effects:
What does this mean?
The Richter Scale Magnitude for this impact is less than zero; no seismic shaking will be felt.
Ejecta:
What does this mean?
Almost no solid ejecta reaches this site.
Air Blast:
What does this mean?
The air blast will arrive approximately 48.8 seconds after impact.
Peak Overpressure: 165000 Pa = 1.65 bars = 23.4 psi
Max wind velocity: 250 m/s = 560 mph
Sound Intensity: 104 dB (May cause ear pain)
Damage Description:
Multistory wall-bearing buildings will collapse.
Wood frame buildings will almost completely collapse.
Highway truss bridges will collapse.
Glass windows will shatter.
Up to 90 percent of trees blown down; remainder stripped of branches and leaves.
Tsunami Wave:
What does this mean?
The impact-generated tsunami wave arrives approximately 2.4 minutes after impact.
Tsunami wave amplitude is between: 45.8 meters ( = 150.0 feet) and 97.5 meters ( = 320.0 feet).
Originally posted by mockrock
Originally posted by bkaust
So why are they waiting on the waves to settle in their bunkers in Hawaii if yu55 is supposed to hit in the atlantic? (not that I believe whatsoever it will impact) just I don't understand why you'd suggest they hide when it's a different ocean.
Errr the logic is.. it hits somewhere else.. you want to be as far away as possible! So bunker on the other side of the World would be ideal..
Originally posted by TinkerHaus
If YU55 hit the North Atlantic it would only have local effects.
The tsunami would be on par with say, the Indonesian tsunami of 2004. Lots of destruction locally, but that would be where it stopped.
I've come to the conclusion that most people spreading these doom scenarios don't believe their own words. If you TRULY believed that an asteroid was going to strike Earth and wipe most of us out would you be sitting in your mom's basement writing up doom threads or would you be getting your survival gear/plans in order?
Originally posted by mockrock
Originally posted by TinkerHaus
If YU55 hit the North Atlantic it would only have local effects.
The tsunami would be on par with say, the Indonesian tsunami of 2004. Lots of destruction locally, but that would be where it stopped.
I've come to the conclusion that most people spreading these doom scenarios don't believe their own words. If you TRULY believed that an asteroid was going to strike Earth and wipe most of us out would you be sitting in your mom's basement writing up doom threads or would you be getting your survival gear/plans in order?
Survival plans sorted ! Just trying to get info to see if the wave would get us here... I think the UK is probably screwed. Initially I thought it was going to be the Pacific but the APEC meeting in Hawaii suggest otherwise..
Got a year of food.. Generators diesel etc.
So just going to have a good day! I have been fairly sure something was going to happen with YU55 so went through the panic mode a long time ago, pretty settled and at peace now.
Originally posted by mockrock
The truth is we have no idea what an impact the size of asteroid YU55 would result in..
Computer models can't reliably predict the weather yet.. because of the amount of variables. It is the same with asteroid impacts..
But what if asteroid YU55 has been steered to crash into the Atlantic..