Open AccessSeismic reflection studies using local earthquake sources
Author(s) -
Meyer Robert P.,
James David E.
Publication year - 1987
Publication title -
geophysical journal of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0016-8009
DOI - 10.1111/j.1365-246x.1987.tb04383.x
Subject(s) - seismology , geology , induced seismicity , aftershock , crust , reflection (computer programming) , stacking , magnitude (astronomy) , mantle (geology) , focal mechanism , normalization (sociology) , geodesy , geophysics , physics , computer science , programming language , nuclear magnetic resonance , astronomy , sociology , anthropology
Summary. A method is presented for processing three‐component digital recordings of micro‐earthquakes to obtain near‐vertical reflection profiles in regions of shallow seismicity. The processing includes magnitude and focal‐depth normalization and event stacking, where stacking is by small localized groups, with ray theoretical time and distance corrections applied to compensate for varying focal depths. In areas with high seismicity, this procedure allows earthquakes to be treated as “controlled” sources to probe layered structures of the deep crust and upper mantle. The validity of our approach is demonstrated using S‐waves from aftershocks of the Borah Peak, Idaho, earthquake (Ms = 7.3) of 1983.