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My November 2023 movie of comet Encke over 20,000 years, showing the orbit wobble and pivot such that every 3000-35000 years there is a 400 year period of intensive interaction with the debris trail. |
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My August 11, 2022 presentation to the 13th Planetary Crater Consortium Meeting Update on our Software Simulating Low Angle Skip Impacts – Now 3D and Showing the Ejecta Secondary Impacts. |
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My March 9, 2022 presentation to the Lunar and Planetary Society Meeting 2022 3D Software to Evaluate very low angle Impacts, Skip Impacts, and the Possibility that Comet 109P/Swift-Tuttle has Previously hit Earth, Forming the Carolina Bays as Secondary Impacts. |
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My November 2023, 3D computer program, showing the secondary splash impacts expected from a Swift Tuttle Skip Impact. and many other impact events. Includes a direct hit of the Chesapeake Bay impact. It shows that the entire group of Carolina Bays’ variable angles and shapes can all be produced with a single event. It also allows you to see the various types of skip impacts likely, and what a debris cloud looks like many years later. The newest feature is Comet Encke’s orbit changing over time and the debris trail interacting with Earth every 3000-3500 years. There is a manual in progress included in the .zip file. Try pressing F1 to F5 for skip impacts, Ctrl Q to Ctrl Y for various impact scenes, Ctrl A for a presentation of the range of impact angles possible for different incoming speeds, and Ctrl S, D, F for the 3D Carolina Bays The opening menu allows you to select which option to run. |
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My Aug 11, 2021 presentation to the 12th Planetary Crater Consortium Meeting on considering that the fireball distribution related to Comet Swift-Tuttle is more accurately matched by skip impact debris than from the standard debris trail produced by comets. |
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My presentation to the Royal Astronomical Society, Feb. 12, 2021 on recognizing that Swift Tuttle impacted Earth about 12700 years ago. |
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My presentation to AGU Dec 2020 on recognizing that Swift Tuttle impacted Earth about 12700 years ago. |
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My presentation to Royal Astronomical Society, Oct. 4, 2019 on the influence of Dwarf Planets and the stability of Kuiper Belt Objects and why we should expect 1,000 times more comets hitting Earth than asteroids. |
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My presentation at the Lunar and Planetary Society Conference, Mar. 18, 2019 on the influence of Dwarf Planets and the stability of Kuiper Belt Objects and why we should expect 1,000 times more comets hitting Earth than asteroids. |
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My presentation to Western U., May 25, 2018 |
| Is Chicxulub too small – The Amazon Basin fits as the source of the K/Pg layer. (AGU Poster 2016) |
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Comet Impacts large enough to cause Extinctions. (AGU Poster 2017) |
| Draft Journal Article on 23.4° features on Earth |
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Draft Journal Article on the Amazon Basin considered as an impact crater |
| Calculations of Angle of Impact Probabilities – Why low angle impacts are expected. |