Naslov
How good are global Earth models in predicting the depth dependence of the 20 s surface waves excitation?

Autori
Herak, Marijan ; Panza, Giuliano ; Costa, Giovanni

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
IASPEI 1997, The 29th General Assembly of the IASPEI, Abstracts / IASPEI - : Aristotle University of Thessaloniki, 1997, 279-279

Skup
The 29th General Assembly of the International Association of Seismology and Physics of the Earth"s Interior

Mjesto i datum
Solun, Grčka, 18.08.1997. - 28.08.1997

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
theoretical seismogram; Earth models; surface waves

Sažetak
The modal summation technique is used to generate theoretical seismograms of the first 10 modes of Love and Rayleigh waves assuming PREM and IASPEI91 global Earth models and 288 focal mechanisms for each of the 15 source depths ranging between 0 and 600 km. On the basis of the results of previous research we consider a constant epicentral distance, equal to 4500 km. The amplitudes of 20+/-2 s waves are measured on each of the synthetic seismograms, and averaged for each of the depths yielding theoretical curves of amplitude vs. depth for all 3 considered components. In order to compare these results with observations, we use individual stations data on 20 s surface wave amplitudes for 515 earthquakes with focal depths up to 631 km, as reported in the ISC and NEIC bulletins. To enable comparison, all data are reduced to the same seismic moment and the same distance.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA