As determined by satellite laser ranging the rate of contraction of a 900 kilometer baseline between sites located near Quincy in northern California and San Diego in southern California is about 61-65 mm/yr with a formal uncertainty of about 10 mm/yr (Christodoulidis, et. al., 1984). The measured changes in baseline length are a manifestation of the relative motion between the North America an...

Abstract The Ambon fault in the northern Banda Arc has capability of generating M w 6.9 earthquake. poses a significant seismic hazard to Island because is located near populous areas, City. Recent seismicity and surrounding areas indicates that this region actively deforming. experienced many damaging earthquakes since 17 th century. However, potential on island remains enigmatic due lack deta...

Large earthquake ruptures on or near the plate boundary megathrust fault offshore of northeastern Honshu, Japan, produce variable levels of regional highfrequency ground shaking. Analyses of 0.1–10 Hz strong ground motion recordings from K-NETand KiK-net stations and 0.3–3.0 Hz short-period recordings from Hi-net stations establish that the shaking variations result from a combination of differ...

Abstract We study how the asymmetric geometry of thrust faults affects dynamics supershear ruptures and their associated trailing Rayleigh as they interact with free surface, investigate resulting near‐field ground motions. Earthquakes are mimicked by propagating laboratory along a frictional interface 61° dip angle. Using an experimental technique that combines ultrahigh‐speed photography digi...

Abstract There is a sparse number of credible source models available from largemagnitude past earthquakes. A stochastic source-model-generation algorithm thus becomes necessary for robust risk quantification using scenario earthquakes. We present an algorithm that combines the physics of fault ruptures as imaged in laboratory earthquakes with stress estimates on the fault constrained by field ...

Abstract An unusually damaging Mw 4.9 earthquake occurred on November 11, 2019 in the south east of France within lower Rhône river valley, an industrial region that hosts several operating nuclear power plants. The hypocentre this event at exceptionally shallow depth about 1 km. Here we use far-field seismological observations to demonstrate rupture properties are consistent with those commonl...