Near-field effects of asteroid impacts in deep water
- Los Alamos National Laboratory
Our previous work has shown that ocean impacts of asteroids below 500 m in diameter do not produce devastating long-distance tsunamis. Nevertheless, a significant portion of the ocean lies close enough to land that near-field effects may prove to be the greatest danger from asteroid impacts in the ocean. Crown splashes and central jets that rise up many kilometres into the atmosphere can produce, upon their collapse, highly non-linear breaking waves that could devastate shorelines within a hundred kilometres of the impact site. We present illustrative calculations, in two and three dimensions, of such impacts for a range of asteroid sizes and impact angles. We find that, as for land impacts, the greatest dangers from oceanic impacts are the short-term near-field, and long-term atmospheric effects.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-06NA25396
- OSTI ID:
- 989827
- Report Number(s):
- LA-UR-09-03686; LA-UR-09-3686; TRN: US201019%%885
- Resource Relation:
- Conference: Symposium on submarine mass movement and their consequences ; November 8, 2009 ; Austin, TX
- Country of Publication:
- United States
- Language:
- English
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