![]() ![]() 29 unifies this datatype from literature studies in a consistent database. High-resolution surface deformation datasets from normal faults are limited to a few recent earthquakes 24, 25, 26, 27, 28. 23 reexamined the surface deformation produced by the 1983Eq, showing that structural-geological complexities present along the fault guided the coseismic deformation pattern along its northern 16 km and providing new mapping and vertical separation measurements (Supplementary Figure 1). Others constrained the timing of multiple prehistoric surface faulting events 17, 18, 19, 20, 21, 22 from Quaternary geology, paleo-seismological trenching and radionuclide dating. 13, mapped the surface ruptures over the ~37 km ruptured fault and measured the vertical (Supplementary Figure 1) and the strike-slip components, highlighting a ~17% left-lateral component of the total slip. The Thousand Springs and the southern Warm Springs segments were activated in 1983 with a normal-oblique rupture mechanism (Fig. Some studies characterized the surface and depth deformation pattern dividing the fault with boundaries and complexities in six ~SW-dipping active normal segments: Challis, Warm Springs, Thousand Springs, Mackay, Pass Creek, and Arco 12, 13, 14, 15, 16. Geodetic data suggested a planar high-angle source fault 9, 10, 11. 1) with subsequent northwestward propagation. Multiple studies constrained the fault geometry at depth, the seismic sequence, and tectonic strain from shallow seismic lines, seismological data and GPS velocities 2, 3, 4, 5, 6, 7, 8, highlighting the nucleation of the rupture at a depth of ~16 km at the southern tip of the activated fault (Fig. The LRF and the 1983Eq have been the focus of seminal investigations. ![]() The LRF is in the northernmost portion of the Basin and Range Province 1, strikes ~N25°W and dips ~75°SW. In 1983, the Borah Peak earthquake (M w 6.9, hereinafter referred to as 1983Eq), one of the largest and most recent normal-faulting earthquakes in the United States, ruptured ~35 km of the ~130-km-long Lost River Fault (LRF) in southeastern Idaho (Fig. In-depth studies of these systems contribute to understanding earthquake recurrence rates, surface rupture processes, fault displacement hazard, and the tectonic significance of these fault systems at late-Quaternary timescales. ![]() In the past 40 years, numerous moderate-to-large intra-continental extensional earthquakes (M w 6–7) have generated complex surface ruptures along primary and secondary synthetic and antithetic splay faults. Our methodology can be applied to other fault zones with high-resolution topographic data. Our novel dataset supports advancing scientific knowledge about this fault system, refining scaling laws of intra-continental faults, comparing to other earthquakes to better understand faulting processes, and contributing to global probabilistic hazard approaches. We provide Digital Elevation Models, orthophotographs, and three tables of: (i) 757 surface rupture traces, (ii) 1295 serial topographic profiles spaced 25 m apart that indicate rupture zone width and (iii) 2053 vertical separation measurements, each with additional textual and numerical fields. From new 5 to 30 cm-pixel resolution topography collected by an Unmanned Aerial Vehicle, we produce the most comprehensive dataset of systematically measured vertical separations from ~37 km of fault length activated by the 1983 and prehistoric earthquakes. The earthquake ruptured ~35 km of the fault with a maximum throw of ~3 m. We present high-resolution mapping and surface faulting measurements along the Lost River fault (Idaho-USA), a normal fault activated in the 1983 (M w 6.9) earthquake.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |