Geoscience Reference
In-Depth Information
Oc
1,000
1,000
10,000
Di
(km)
1,000
3,000
I
I
0.2
0.4
0.1
1,000
10,000
Fig. 4.20 Decrease of cosmogenic tsunami amplitude with distance from impact point of object.
Calculations are preformed for various sizes of object and ocean depths (Adapted from [Ward,
Asphaug (2002)])
where
. The dependence (4.50) is shown in
Fig. 4.20. It is calculated for various sizes of falling celestial bodies and ocean
depths. The data, shown in the figure, permit to estimate the degree of danger
(the height of waves) represented by tsunamis of cosmogenic origin at different
distances from the point of impact. When one approaches the coast, the wave am-
plitude (like in all tsunami cases) will increase by several times, owing to a decrease
in depth.
In conclusion, we once again draw attention to the probability of a large mete-
orite, capable of causing significant tsunami waves, falling on Earth being extremely
small. But, if such an event actually does take place, then among other catastrophic
consequences tsunami waves will certainly not play the last part.
γ
= 1
/
2 + 0
.
575 exp
{−
0
.
035
R
C
/
H
}
