Please join us for the Geophysics Seminar on Friday, March 18 at 4:00PM in the IGPP Munk Conference Room
Speaker: Adrian Doran, IGPP
Title: An automated, high-accuracy seismometer orientation method and initial results from the recently-completed Patton Escarpment OBS deployment
I will discuss two ongoing projects related to ocean bottom seismology. The majority of the talk will focus on a recently developed method to precisely determine the geographic orientation of the horizontal components of broadband seismometers. The problem currently lacks a standardized or consistent approach, and individual PIs often compute the orientations concurrent with the analysis of another seismic observable. I present an automated, rapid, and high-accuracy method that relies on calculating the arrival angle of surface waves at a range of frequencies and orbits. I benchmark our method against other algorithms and known orientations, and then produce orientation estimates for all 200+ OBS deployed as part of the recently completed Cascadia Initiative. The remainder of the talk will present initial results from the recently completed Patton Escarpment seismicity experiment. The project consisted of five OBS instruments deployed in the deep ocean just off the Patton Escarpment, adjacent to the California Borderland. I will present results that only scratch the surface of this rich and promising dataset.
(Coffee, tea, and snacks will be available in the IGPP Reading Room at 3:30 prior to the seminar.)