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Strain and displacement measurements for the June 9, 1980 Victoria, Mexico Earthquake
Author(s) -
Darby D.,
Nyland E.,
Suarez F.,
Chavez D.,
Gonzalez J.
Publication year - 1981
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/gl008i006p00549
Subject(s) - epicenter , seismology , geology , theodolite , magnitude (astronomy) , compression (physics) , earthquake magnitude , foreshock , fault (geology) , slip (aerodynamics) , geodesy , aftershock , engineering , physics , geometry , mathematics , astronomy , aerospace engineering , scaling , thermodynamics
A microgeodetic network 22 km south east of Est. Guadalupe Victoria, Baja California Norte, installed in late May 1980, has been resurveyed in an experiment that started 12 hours after the June 9, 1980 Victoria earthquake, which had an epicenter at 10 km depth about 12 km from the network. The resurvey was complete by June 13. Both the initial observations and the resurvey were done with HP3800 distance meter equipment. Some angular control was provided with a Wild T3 theodolite. The network underwent a compressive strain of 7 ± 3 micro strain essentially parallel the Cerro Prieto fault about the time of the earthquake. Strains of this size are associated with simple dislocation models of earthquakes of this magnitude. Its direction appears to be anomalous however. This may indicate compression related to soil liquefaction processes or strain near the end of the slip plane.