GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 1.1 GNGTS 2023 Figure 3. Full integration of data analysed in our research. The upper portion of the figure shows the segmentation orders with different colors. (a–c) are interconnected and the segmentation is marked by vertical solid (sections) and dotted (subsections and sectors) lines. (a) Slip vectors (thin white arrows), RZWs (yellow polygons), and geometric-structural complexities (bold white or red arrows) mapped along the Arentson Gulch Fault, Thousand Springs Segment, and Warm Springs Segment. Arrows indicating the complexities are red if correspond to a segmentation boundary and white if not. (b) T-axes of the strain (blue arrows) and average fault planes and slickenlines represented with stereoplots. (c) Long-term (upper graph) and 1983 (lower graph) rupture behavior along the Thousand Springs Segment, Warm Springs Segment, and Arentson Gulch Fault. Black and grey curves are the envelopes obtained from the VS analysis with sampling steps 2 and 30, respectively. Green and red lines correspond to the Qfs and CoRs VS integrated measurements, respectively. The yellow star is the projection of the 1983 mainshock considering the trend of the seismogenic source parallelogram in Richins et al. (1987; their Figure 7). (d) 3D model comparing the CoRs-VS envelopes (in cm) and the FW- and HW-RZW (in m). References Bello S., Scott C.P., Arrowsmith R., and Scott T.; 2020: High resolution topography along the Lost River Valley, Idaho 2019 . OpenTopography. Bello S., Scott C.P., Ferrarini F., Brozzetti F., Scott T., Cirillo D., de Nardis R., Arrowsmith R., and Lavecchia G.; 2021: High-resolution surface faulting from the 1983 Idaho Lost River Fault Mw 6.9 earthquake and previous events . Scientific Data 8, 68. https://doi.org/10.1038/s41597-021-00838-6 Bello S., Andrenacci C., Cirillo D., Scott C.P., Brozzetti F., Arrowsmith R., and Lavecchia G.; 2022: High-detail fault segmentation: Deep insight into the anatomy of the 1983 Borah Peak earthquake rupture zone (Mw 6.9, Idaho, USA) . Lithosphere (1): 8100224. https://doi.org/10.2113/2022/8100224 Boatwright J.; 1985: Characteristics of the aftershock sequence of the Borah Peak, Idaho, earthquake determined from digital recordings of the events . Bulletin of the Seismological Society of America, vol. 75, no. 5, pp. 1265–1284. Bunds M. P., DuRoss C. B., Gold R. D. et al.; 2019: High resolution topography of the northern 16 km of the M6.9 1983 Borah Peak earthquake surface rupture on the Lost River fault zone, Idaho, USA . OpenTopography. Bunds M. P., DuRoss C. B., Gold R. D. et al.; 2020: Lost River fault at Doublespring Pass Rd, Idaho 2015, Utah Valley University (UVU) . Distributed by OpenTopography. Doser D. I. and Smith R. B.; 1985: Source parameters of the 28 October 1983 Borah Peak, Idaho, earthquake from body wave analysis . Bulletin of the Seismological Society of America, vol. 75, no. 4, pp. 1041–1051.