Open AccessSome results of the short‐time ocean bottom seismological observations in the central part of the Azores‐Gibraltar fault
Author(s) -
Soloviev S. L.,
Kuzin I. P.,
Kovachev S. A.,
Moreira V. S.,
Senos M. L.,
Cruz J. F.
Publication year - 1992
Publication title -
geophysical journal international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.302
H-Index - 168
eISSN - 1365-246X
pISSN - 0956-540X
DOI - 10.1111/j.1365-246x.1992.tb00882.x
Subject(s) - seismometer , seismology , geology , induced seismicity , fault (geology) , magnitude (astronomy) , astronomy , physics
SUMMARY An investigation of the seismicity of the area in which the high magnitude earthquakes of 1931 May 20, 1941 November 25 and 1975 May 26 were generated was carried out in 1988 August by the Institute of Oceanology of the Academy of Sciences of USSR in collaboration with the National Institute for Meteorology and Geophysics of Portugal. Five seismographs were installed by the R/V Akademic Kurchatov on the sea bottom in that area for 13 days at depths ranging from 3400 m to 5100 m. A total of 99 earthquakes was registered, the magnitudes M L of the events ranging from ‐0.5 to 3.0. Most of the epicentres located in this investigation are probably situated along the Azores‐Gibraltar fault or along the fault associated with it, trending NW‐SE, which is considered to be responsible for the 1975 earthquake. An alignment of epicentres, trending approximately NE‐SW, probably connected with a fault, is also proposed.