SM2.3A discussion of the seismic input: What is the relation between destructive earthquakes and seismic tremor?
/ Attendance Mon, 23 Apr, 15:30–17:00 / Hall X/Y
Engineering seismology is mostly concerned with SH-waves as prime source for earthquake stresses induced to structures. Standard 1D equivalent-linear codes, for example, model incident SH waves vertically propagating through a layered medium up to the surface and reflecting downward to the bedrock and back inducing amplification at the SH-resonance frequencies of the system.
However, excluding the case of very deep earthquakes, the dominant part of the seismogram (concerning both amplitude and duration) is not body but surface waves. The SH waves are often even hardly distinguishable in the recordings, to the point that no earthquake magnitude is defined on the S-waves, while a number of magnitude types are defined on surface waves. Seismic tremor, on the contrary , is essentially composed of surface waves and there exists an increasing number of exploration techniques based on it.
In this session we welcome contributions on the identification of the seismogram portions, of the wave types that produce structural damage during earthquakes, as well as on how we can use seismic ambient noise to assess subsoil response to earthquakes and soil-structure interaction.
Contributions on passive and active seismic methods, on linear and non-linear effects are welcome.