Limitations of Waveform Modelling of Long-Period Seismograms

Autor:	Joseph Ha, K. J. Muirhead, S. F. Ingate
Rok vydání:	1986
Předmět:	Seismometer Synthetic seismogram Earth structure engineering.material Geodesy Seismic wave Physics::Geophysics Geophysics Amplitude Geochemistry and Petrology engineering Waveform Structure of the Earth Seismogram Geology Seismology
Zdroj:	Geophysical Journal International. 86:57-61
ISSN:	1365-246X 0956-540X
DOI:	10.1111/j.1365-246x.1986.tb01072.x
Popis:	Summary. In recent years the use of synthetic seismograms calculated for radially stratified models has gained increasing popularity as a means of placing further constraints on the velocity structure of the Earth’s mantle. Such synthetics do, however, have a number of limitations. At short periods (-1 s) the amplitudes as well as the wave shapes of travel-time branches are affected by seismograph siting, the structure immediately beneath the seismograph and any laterally heterogeneous structure in the mantle. Later arrivals can also be masked by signal-generated noise and by extended source times. At longer periods (-20 s) the larger wavelengths reduce the sensitivity of amplitudes and waveforms to contarninating effects. As a result the use of long-period synthetics can only lead to the resolution of the gross features of the Earth’s interior.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cac1ce4f8803e1e115bfb6f02a088427 https://doi.org/10.1111/j.1365-246x.1986.tb01072.x Zobrazit plný text záznamu Plný text