S012-0007
Towards Multi-Component Observations of Seismic Rotation, Strain and Translation
Tuesday, 8 December 2020
Poster
Felix Bernauer1, Joachim M Wassermann2, Heiner Igel3, Stefanie Donner4, Klaus Stammler4, Mathias Hoffmann4, Patrick Paitz5, David Sollberger6, Pascal Edme7, Cedric Schmelzbach7 and Eva P. S. Eibl8, (1)Ludwig Maximilians University of Munich, Earth- and Environmental Sciences, Munich, Germany, (2)Section Geophysics, Munich, Germany, (3)Ludwig Maximilians University of Munich, Munich, Germany, (4)BGR Federal Institute for Geosciences and Natural Resources, Hannover, Germany, (5)Department of Earth Sciences, Institute of Geophysics, Zürich, Switzerland, (6)ETH Zurich, Zurich, Switzerland, (7)ETH Zurich, Department of Earth Sciences, Institute of Geophysics, Zurich, Switzerland, (8)University of Potsdam, Potsdam, Germany
Abstract:
Fiber-optic gyroscopes (FOGs) and distributed acoustic sensing (DAS) cables, make it possible to directly observe rotation and strain of the seismic wave field in temporary field experiments. On one side, these technologies open a variety of new applications like microzonation, wave field separation and source localization with a single 6DoF seismic station. On the other side, they facilitate seismic experiments in harsh and complicated environments like glaciers, volcanoes, the ocean bottom or other planets.
As an attempt in exploring the potentials of joint rotation, strain and translation measurements, researchers from the Ludwig-Maximilians University of Munich (LMU), the Federal Institute for Geosciences and Natural Resources, the University of Potsdam and the ETH Zürich organized an active source experiment in November 2019 at the Geophysical Observatory of the LMU in Fürstenfeldbruck, Germany, which involved a variety of rotation, strain and translation sensors.
In this contribution, we present results from one part of the experiment where translation and rotation sensors were co-located with a 2-dimensional DAS-cable grid. We compare direct rotation and strain measurements from FOGs and DAS-cables to indirect observations derived from a small aperture array of classical broadband seismometers.
