Please note: the results below are estimates based on current (limited) understanding of the impact process and come with large uncertainties; they should be used with caution, particularly in the case of peculiar input parameters. All values are given to three significant figures but this does not reflect the precision of the estimate. For more information about the uncertainty associated with our calculations and a full discussion of this program, please refer to this article
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Your Inputs:
- Distance from Impact: 1.00 meters ( = 3.28 feet )
- Projectile diameter: 100.00 meters ( = 328.00 feet )
- Projectile Density: 1000 kg/m3
- Impact Velocity: 300.00 meters per second ( = 984.00 feet per second )
- Impact Angle: 90 degrees
- Target Density: 2500 kg/m3
- Target Type: Sedimentary Rock
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Energy:
- Energy before atmospheric entry: 2.36 x 1013 Joules = 0.56 x 10-2 MegaTons TNT
- The average interval between impacts of this size somewhere on Earth during the last 4 billion years is 2.2 x 103years
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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.
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Atmospheric Entry:
- The projectile begins to breakup at an altitude of 15900 meters = 52300 ft
- The projectile reaches the ground in a broken condition. The mass of projectile strikes the surface at velocity 0.112 km/s = 0.0695 miles/s
- The energy lost in the atmosphere is 2.03 x 1013 Joules = 0.48 x 10-2 MegaTons.
- The impact energy is 3.28 x 1012 Joules = 0.78 x 10-3MegaTons.
- The larger of these two energies is used to estimate the airblast damage.
- The broken projectile fragments strike the ground in an ellipse of dimension 0.462 km by 0.462 km
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Crater Dimensions:
- What does this mean?
- 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:
75 meters ( = 246 feet )
- Transient Crater Depth: 26.5 meters ( = 86.9 feet )
- Final Crater Diameter:
93.7 meters ( = 307 feet )
- Final Crater Depth: 19.9 meters ( = 65.4 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 9.25 meters ( = 30.3 feet ).
- At this impact velocity ( < 12 km/s), little shock melting of the target occurs.
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Ejecta:
- What does this mean?
- Most ejecta is blocked by Earth's atmosphere
