PHASE Advanced Concepts

Serge A. Shapiro

Jan 01, 2004 — Dec 31, 2023

PHASE (Physics and Application of Seismic Emissions) Advanced Concepts is an independent, non-profit, pure research project at Freie Universität Berlin, Germany. Since 2004, an international team of scientists and students has performed research towards a better understanding of the physics of ...

Anatomy of a Subduction Zone from Ocean Mantle to Crust: Seismicity and Seismic Structure in Northern Chile

Jan 01, 2015 — Dec 31, 2019

We investigate subduction-related seismic structures, including the fine-scale structure of the megathrust shear zone and underlying oceanic plate, and of earthquake sources in the northern Chile forearc by employing a suite of innovative methods of seismicity processing, imaging and ...

Disentangling roles of stress, pore pressure and shaking from wavefields recorded during the 2014 Northern Chile earthquake sequence — WAVEFIELDS

Jan 01, 2015 — May 31, 2019

This project aims at quantifying and understanding the structural dynamics within the crust leading to, during and after a great megathrust earthquake. This includes the evolution of stress in the lithosphere and identifying signatures of possible fluid migration at depth. We will exploit the ...

From Top to Bottom-Seismicity, Motion Patterns & Stress Distribution in the Alpine Crust

Jörn Kummerow

Nov 01, 2017 — Dec 19, 2023

The aim of our project is to investigate the processes which control the seismicity of the Alps. We hypothesize that patterns of stress and motion can be quantified from the seismicity which is observed with unprecedented resolution by AlpArray ( http://www.alparray.ethz.ch/en/home ). A major ...

Inferring heterogeneity of fault properties and stress state of a megathrust fault from dynamic stress drop variations: A feasibility study in the northern Chilean subduction zone

Jonas Folesky

Oct 01, 2020 — Sep 30, 2023

In this research project the spatiotemporal patterns of seismic stress drop at the seismically highly active northern Chilean subduction zone will be investigated. For this an integrative analysis approach based on the combination of three independent stress drop estimation techniques is ...

MAGS

Oct 01, 2013 — Sep 30, 2016

The further development of geothermal systems has recently been affected by the occurrence of perceptible earthquakes which led to concern by the local population. For the public acceptance of deep geothermal energy it is vital to give a clear scientific statement whether the seismicity will stay limited to micro-earthquakes or if the induced events might pose a risk for humans and/or infrastructure. Within the framework of the BMU funded project MAGS concepts will be elaborated how to limit the induced seismicity in deep geothermal systems and thus, avoiding perceptible events.

Rupture processes and magnitude statistics of induced earthquakes and aftershocks: A detailed view from deep South African gold mines

Sep 01, 2017 — Aug 31, 2019

Despite our general understanding of earthquake processes, it is stillnot fully understood how earthquakes ruptures nucleate and propagate and why they stop. Furthermore, the controlling factors of the frequency and the size of earthquake are subject of ongoing research. In our proposal, we aim to ...

Stress dependency of seismic velocity

Aug 01, 2015 — Jul 31, 2017

The aim of the project was to improve the estimation of pressure dependent velocity in sedimentary rocks, taking into account lithology (e.g. clay content) and pressure conditions. The project included theoretical and phenomenological analyses of intrinsic and stress induced seismic ...