Virtual Quake: Statistics, Co-seismic Deformations and Gravity Changes for Driven Earthquake Fault Systems

2015 ◽  
pp. 29-37 ◽  
Author(s):  
Kasey W. Schultz ◽  
Michael K. Sachs ◽  
Mark R. Yoder ◽  
John B. Rundle ◽  
Don L. Turcotte ◽  
...  
Keyword(s):  
Earthquake Fault ◽  
Seismic Deformations ◽  
Fault Systems ◽  
Gravity Changes

Simulating Gravity Changes in Topologically Realistic Driven Earthquake Fault Systems: First Results

2014 ◽  
Vol 173 (3) ◽  
pp. 827-838 ◽  
Author(s):  
Kasey W. Schultz ◽  
Michael K. Sachs ◽  
Eric M. Heien ◽  
John B. Rundle ◽  
Don L. Turcotte ◽  
...  
Keyword(s):  
Earthquake Fault ◽  
Fault Systems ◽  
Gravity Changes ◽  
First Results

scholarly journals Active Fault Systems in the Inner Northwest Apennines, Italy: A Reappraisal One Century after the 1920 Mw ~6.5 Fivizzano Earthquake

Geosciences ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 139
Author(s):  
Giancarlo Molli ◽  
Isabelle Manighetti ◽  
Rick Bennett ◽  
Jacques Malavieille ◽  
Enrico Serpelloni ◽  
...  
Keyword(s):  
Large Scale ◽  
Active Fault ◽  
Active Faults ◽  
Dense Network ◽  
Earthquake Fault ◽  
Slip Rates ◽  
Fault Systems ◽  
Seismological Data ◽  
Seismogenic Faults

Based on the review of the available stratigraphic, tectonic, morphological, geodetic, and seismological data, along with new structural observations, we present a reappraisal of the potential seismogenic faults and fault systems in the inner northwest Apennines, Italy, which was the site, one century ago, of the devastating Mw ~6.5, 1920 Fivizzano earthquake. Our updated fault catalog provides the fault locations, as well as the description of their architecture, large-scale segmentation, cumulative displacements, evidence for recent to present activity, and long-term slip rates. Our work documents that a dense network of active faults, and thus potential earthquake fault sources, exists in the region. We discuss the seismogenic potential of these faults, and propose a general tectonic scenario that might account for their development.

A feasibility study of data assimilation in numerical simulations of earthquake fault systems

2007 ◽  
Vol 163 (1-4) ◽  
pp. 149-162 ◽  
Author(s):  
Jordan Van Aalsburg ◽  
Lisa B. Grant ◽  
Gleb Yakovlev ◽  
Paul. B. Rundle ◽  
John B. Rundle ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Numerical Simulations ◽  
Feasibility Study ◽  
Earthquake Fault ◽  
Fault Systems

The Performances of GRACE Mascon Solutions in Studying Seismic Deformations

2020 ◽  
Author(s):  
Lan Zhang ◽  
He Tang ◽  
Le Chang ◽  
Wenke Sun
Keyword(s):  
Tohoku Earthquake ◽  
Gravity Change ◽  
Mathematical Treatment ◽  
Seismic Signals ◽  
Gaussian Filter ◽  
Seismic Deformations ◽  
Gravity Changes ◽  
Grace Data ◽  
Basin Scale ◽  
Large Earthquakes

<p>The GRACE mascon solutions, called the advanced products of GRACE data, are widely used in cryosphere science or hydrology research. It has been demonstrated that the mascon solutions have the same or better performances compared with the spherical harmonic (SH) solutions at the basin scale. However, although the mascon solutions are expected to have the ability to recover the transient gravity signals due to large earthquakes, few studies have investigated the performances of the mascon solutions in studying seismic deformations systematically. In this study, we attempt to examine the performances of the mascon solutions for transient gravity signals induced by three M9 class earthquakes: the 2011 Tohoku-Oki, 2004 Sumatra and 2010 Chile earthquakes, and compare them with the SH solutions and theoretical gravity changes modelled by dislocation theory. We analyse the co-seismic gravity changes and conclude that the mascon solutions contain almost identical information as the SH solutions and can retrieve the co-seismic gravity change signals in the resolutions equivalent to the Gaussian filter radii of 210~270 km. However, the mascon solutions have other strengthening gravity change signals, with magnitudes that are the same order as that of the SH solutions and contain pre-seismic gravity change signals in the Tohoku earthquake. These strengthening and pre-seismic signals are both considered artificially introduced noise due to the mathematical treatment before releasing rather than real geophysical signals.</p>

Understanding earthquake fault systems using QuakeSim analysis and data assimilation tools

2009 ◽  
Author(s):  
Andrea Donnellan ◽  
Jay Parker ◽  
Margaret Glasscoe ◽  
Robert Granat ◽  
John Rundle ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Earthquake Fault ◽  
Fault Systems

scholarly journals Critical point theory of earthquakes: Observation of correlated and cooperative behavior on earthquake fault systems

2006 ◽  
Vol 33 (18) ◽  
pp. n/a-n/a ◽  
Author(s):  
Chien-chih Chen ◽  
John B. Rundle ◽  
Hsien-Chi Li ◽  
James R. Holliday ◽  
Donald L. Turcotte ◽  
...  
Keyword(s):  
Critical Point ◽  
Critical Point Theory ◽  
Cooperative Behavior ◽  
Point Theory ◽  
Earthquake Fault ◽  
Fault Systems

scholarly journals Correction to “Critical point theory of earthquakes: Observation of correlated and cooperative behavior on earthquake fault systems”

2007 ◽  
Vol 34 (5) ◽  
Author(s):  
Chien-chih Chen ◽  
John B. Rundle ◽  
Hsien-Chi Li ◽  
James R. Holliday ◽  
Donald L. Turcotte ◽  
...  
Keyword(s):  
Critical Point ◽  
Critical Point Theory ◽  
Cooperative Behavior ◽  
Point Theory ◽  
Earthquake Fault ◽  
Fault Systems

MODELS OF EARTHQUAKE FAULTS: ERGODICITY AND FORECASTING

2009 ◽  
Vol 23 (28n29) ◽  
pp. 5553-5569
Author(s):  
W. KLEIN ◽  
J. XIA ◽  
C. D. FERGUSON ◽  
H. GOULD ◽  
K. F. TIAMPO ◽  
...  
Keyword(s):  
Earthquake Fault ◽  
Fault Systems ◽  
Earthquake Faults ◽  
Real Earthquake

We discuss models of earthquake faults and earthquake fault systems and what they tell us about real earthquake faults. We concentrate on the question of whether models and real earthquake fault systems are in equilibrium and whether the system being in equilibrium affects the accuracy of forecasting algorithms.

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