...Sally F. McGill; Clarence R. Allen; Kenneth W. Hudnut; David C. Johnson; Wayne F. Miller; Kerry E. Sieh Abstract Alignment arrays and creepmeters spanning several faults in southern California recorded slip associated with the 24 November 1987 Elmore Ranch and Superstition Hills earthquakes...

...Patrick L. Williams; Harold W. Magistrale Abstract Surficial slip along the entire mapped length of the Superstitition Hills fault in southern California occurred in association with the Superstition Hills earthquake ( M s 6.6) of 24 November 1987. We made repeated measurements of surface slip...

...K. W. Hudnut; L. Seeber; T. Rockwell Abstract The Elmore Ranch fault is a left-lateral fault that strikes northeast within the right-lateral transform boundary that strikes northwest through southern California. It lies transverse and adjacent to the segment of the Superstition Hills fault...

...Roger Bilham; Jeffrey Behr Abstract A new differential creepmeter on the Superstition Hills fault reveals that afterslip at approximately 28 mm/year consists of episodic creep events super-imposed on a slow stable-slip component of 2.4 mm/year. The relative contribution from this background slip...

... was associated spatially and probably temporally with left-lateral surface rupture on many northeast-trending faults in and near the Superstition Hills in western Imperial Valley. Three curving discontinuous principal zones of rupture among these breaks extended northeastward from near the Superstition Hills...

...K. W. Hudnut; K. E. Sieh Abstract We have investigated the recent prehistoric behavior of the Superstition Hills fault by examining its effect on the beach deposits of ancient Lake Cahuilla. Excavation of these sediments in three dimensions where they are cut by the fault has enabled determination...

...Scott C. Lindvall; Thomas K. Rockwell; Kenneth W. Hudnut Abstract Offset geomorphic features along the Superstition Hills fault show evidence for at least one slip event prior to the 1987 surface rupture, and possibly as many as four to five earlier prehistoric earthquakes. We documented several...

...Robert V. Sharp; John L. Saxton Abstract Seven quadrilaterals, constructed at broadly distributed points on surface breaks within the Superstition Hills fault zone, were repeatedly remeasured after the pair of 24 November 1987 earthquakes to monitor the growing surface displacement. Changes...

... of measurements of differential slip; that is, measurements of surface slip which are made relative to a set of nails or stakes emplaced after the earthquake. We apply the inversions to slip measurements made at 53 sites along the Superstition Hills fault for the 11 months following the M = 6.2 and 6.6...

...Ralph E. Klinger; Thomas K. Rockwell Abstract Co-seismic flexural-slip folding of a small anticline along the Eastern Elmore Ranch fault associated with the Superstition Hills earthquake sequence demonstrates that variations in left-lateral slip can be explained locally by folding. Surface rupture...

... earthquakes located in the Superstition Hills, about 37 km northwest of the Imperial fault. The maximum observed displacement was less than 4 cm on both occasions; for the triggered movement the maximum slip occurred on a branch strand near the northern extremity of the fault. Pre-earthquake resurveys...

...Robert V. Sharp; Michael J. Rymer; James J. Lienkaemper Abstract Parts of the Imperial and the Superstition Hills faults moved right laterally at the ground surface at the time of or shortly following the M L 5.6 Westmorland earthquake of 26 April 1981. The displacements probably occurred before...

...K. Hudnut; L. Seeber; T. Rockwell; J. Goodmacher; R. Klinger; S. Lindvall; R. McElwain Abstract Left-lateral slip occurred on individual surface breaks along northeast-trending faults associated with the 24 November 1987 earthquake sequence in the Superstition Hills, Imperial Valley, California...