Ages of Late Holocene earthquakes on the central Garlock fault near El Paso Peaks, California

Temporal variations in Holocene slip rate along the central Garlock fault, Pilot Knob Valley, California

“…Along the central fault segment (Fig. 1), trench records reveal 6 well-resolved events since ~7 ka (McGill and Rockwell, 1998;Dawson et al, 2003). Notably, four of these events occurred during the past 2 k.y.…”

“…McGill and Rockwell (1998) and Dawson et al (2003) bracketed the last rupture of the central Garlock fault at Iron Canyon ( Fig. 1) between A.D. 1450 and 1640.…”

“…Although irregular paleoseismic records along the Garlock fault (e.g., McGill and Rockwell, 1998;Dawson et al, 2003) allow the possibility of time-variable displacement, such behavior is not yet apparent in measures of slip-rate integrated over multiple earthquake cycles. Current data indicates that the average slip rate over the past ~8-16 k.y.…”

Primary Surface Rupture Associated with the Mw 7.1 16 October 1999 Hector Mine Earthquake, San Bernardino County, California

“…Paleoseismic studies conducted after the 1992 Landers earthquake have shown that most of the large earthquakes within the ECSZ near the 1992 Landers rupture occurred in clusters, with intervening periods of relative quiescence lasting several thousand years (Rockwell et al, 2000). earthquakes are the most recent of the current cluster, which has involved rupture of nearly every significant fault in the southwestern Mojave region during the past 1-2 k.y., including four large events on the Garlock fault McGill and Rockwell, 1998). Continued paleoseismic investigations will determine whether this apparent clustering of earthquakes represents a sampling bias or a fundamental pattern of strain release in the ECSZ. Geologic mapping of the earthquake area was done by Dibblee (1966Dibblee ( , 1967a.…”

Preliminary Surficial Geology of the Dove Spring Off-Highway Vehicle Open Area, Mojave Desert, California

“…The fault as a whole has an average slip rate of about 7 mm/yr, with a recurrence interval of 200 to 3000 years, depending on the event magnitude (Astiz and Allen, 1983;Petersen and Wesnousky, 1994). The central part of the Garlock Fault, along the El Paso Mountains, has been studied by McGill and Rockwell (1998) to evaluate its seismic hazard. They found evidence of five surface-rupturing earthquakes in the last 5,000 years.…”