Determination of trajectories of fireballs using seismic network data

Details Determination of trajectories of fireballs using seismic network data Determination of trajectories of fireballs using seismic network data

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufm.p51a1185i&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #P51A-1185

Computer Science

Sound

6022 Impact Phenomena (5420, 8136), 6094 Instruments And Techniques, 6099 General Or Miscellaneous

Scientific paper

Fireballs, Bolides, which are caused by high velocity passages of meteoroids through the atmosphere, generate shockwaves. Meteor shockwave provide us very important information (arrival time and amplitude) to study meteor physics. The shockwave arrival time data enable us to determine trajectories of the fireballs. On the other hand, the shockwave amplitude tells us size and ablation history of the meteoroid. Infrasound observation is one of the ways of detecting bolide shockwaves. However, we have no infrasound observational networks extends for large area with enough spatial distribution for determination of trajectories and estimate ablation histories. We have only a few infrasound arrays that have three or four elements, in the Japanese islands. Last decade, digital seismic networks are greatly improved for the purpose of monitoring micro earthquakes. Those seismic networks are quite sensitive for detecting micro ground vibration, and then those networks could detect not only seismic wave generated by earthquakes, but also ground oscillations generated by coupling of meteor shockwave with the ground near station. Last years, I analyses this kind of ground motion data recorded by seismic network, as meteor shockwave signals. For example, we estimate some great fireball's aerial path from arrival times of shockwaves (e.g., Ishihara et. al., 2003 Earth Planets, and Space, 2004 Geophysical Research. Letters.; Pujol et al., 2006 Planetary and Space Science), and we estimate sizes and ablation history of some great fireball and a meteorite fall (Ishihara et al., 2004 Meteoroids2004). In Japan, some great fireball falls occurred during 2004 to 2005. In this presentation, I show the trajectories of these fireballs determined from shockwave analysis. Some fireballs trajectories are also determined from photographic records. The trajectories determined from shockwave and that from photos show good agreement.

Affiliated with

Also associated with

No associations

Rating

Determination of trajectories of fireballs using seismic network data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Determination of trajectories of fireballs using seismic network data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Determination of trajectories of fireballs using seismic network data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-962354