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Spatial patterns of earthquake sounds and seismic source geometry
Author(s) -
Tosi Patrizia,
De Rubeis Valerio,
Tertulliani Andrea,
Gasparini Calvino
Publication year - 2000
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2000gl011377
Subject(s) - seismology , geology , sound (geography) , focal mechanism , seismic microzonation , event (particle physics) , isotropy , induced seismicity , physics , geomorphology , quantum mechanics
Earthquake sounds are heard during or immediately before an event up to several kilometres around the epicentral area. Sound data as heard by people have been collected by way of macroseismic questionnaires, showing that sound audibility does not follow isotropic patterns. The explanation of this effect is found in the behaviour of the particular radiation pattern of the P‐waves for each earthquake, in connection with its focal mechanism. This result opens the possibility to get more information about the earthquake source parameters in the future and past events, making use of non‐instrumental observations.