Larry J. Ruff
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View article: Stress on the seismogenic and deep creep plate interface during the earthquake cycle in subduction zones
Stress on the seismogenic and deep creep plate interface during the earthquake cycle in subduction zones Open
The deep creep plate interface extends from the down-dip edge of the seismogenic zone down to the base of the overlying lithosphere in subduction zones. Seismogenic/deep creep zone interaction during the earthquake cycle produces spatial a…
View article: Forthcoming papers*
Forthcoming papers* Open
Elastic anisotropy of core samples
View article: The effects of lithospheric thickness and density structure on Earth's stress field
The effects of lithospheric thickness and density structure on Earth's stress field Open
A R Y Lithospheric density and thickness variations are important contributors to the state of stress of the plates.The relationship between the lithosphere's isostatic state, subcrustal structure and stress field, however, remains unresol…
View article: Radiated seismic energy and earthquake source duration variations from teleseismic source time functions for shallow subduction zone thrust earthquakes
Radiated seismic energy and earthquake source duration variations from teleseismic source time functions for shallow subduction zone thrust earthquakes Open
Earthquake source time functions deconvolved from teleseismic broadband P wave recordings are used to examine rupture variations for 417 underthrusting earthquakes located on the interplate interface in circum‐Pacific subduction zones. Mom…
View article: Analysis of the 23 June 2001 M<sub><i>w</i></sub> = 8.4 Peru underthrusting earthquake and its aftershocks
Analysis of the 23 June 2001 M<sub><i>w</i></sub> = 8.4 Peru underthrusting earthquake and its aftershocks Open
On 23 June 2001, a M w = 8.4 underthrusting earthquake occurred in the southern Peru subduction zone, followed by several large aftershocks, including 26 June (M w = 6.7) and 7 July (M w = 7.5). Broadband analyses of seismic data for the l…
View article: What controls the lateral variation of large earthquake occurrence along the Japan Trench?
What controls the lateral variation of large earthquake occurrence along the Japan Trench? Open
The lateral (along trench axis) variation in the mode of large earthquake occurrence near the northern Japan Trench is explained by the variation in surface roughness of the subducting plate. The surface roughness of the ocean bottom near …
View article: The Sanriku‐Oki, Japan, Earthquake of December 28, 1994 (M<sub>w</sub> 7.7): Rupture of a different asperity from a previous earthquake
The Sanriku‐Oki, Japan, Earthquake of December 28, 1994 (M<sub>w</sub> 7.7): Rupture of a different asperity from a previous earthquake Open
Fault geometry, depth, and slip distribution of the Sanriku‐oki earthquake of December 28, 1994 (Ms 7.5) are estimated from seismic waveforms, geodetic measurements, and tsunami waveforms, and compared with those of the 1968 Tokachi‐oki ea…
View article: The great Kurile Earthquake of October 4, 1994 tore the slab
The great Kurile Earthquake of October 4, 1994 tore the slab Open
The fault geometry, depth, and slip distribution of the Kurile earthquake of Oct. 4, 1994 are estimated using seismic waveforms, aftershock distribution, geodetic measurements, and tsunami waveforms. Previous large earthquakes in the Kuril…
View article: Fault parameters and tsunami excitation of the May 13, 1993, Shumagin Islands earthquake
Fault parameters and tsunami excitation of the May 13, 1993, Shumagin Islands earthquake Open
The Shumagin Islands earthquake of May 13, 1993, occurred in a previously identified seismic gap where a large subduction earthquake is expected. We analyzed long‐period surface waves and P waves recorded on the IRIS stations to estimate t…
View article: Geophysical investigations of the Western Ohio-Indiana region. Final report, October 1986--September 1992: Volume 10
Geophysical investigations of the Western Ohio-Indiana region. Final report, October 1986--September 1992: Volume 10 Open
Earthquake activity in the Western Ohio-Indiana region has been monitored with a seismograph network consisting of nine stations located in west-central Ohio and four stations located in Indiana. Six local and regional earthquakes have bee…
View article: Moment tensor rate functions for the 1989 Loma Prieta Earthquake
Moment tensor rate functions for the 1989 Loma Prieta Earthquake Open
The fault plane and overall coseismic slip of the 1989 Loma Prieta, California, earthquake (M s =7.1) are well determined [Plafker and Galloway, 1989]. Teleseismic waves can be used to determine the time history of moment release. We inver…
View article: Rupture process and stress‐drop of the Great 1989 MacQuarie Ridge Earthquake
Rupture process and stress‐drop of the Great 1989 MacQuarie Ridge Earthquake Open
On May 23, 1989, a great (M w =8.1) earthquake occurred in the Macquarie Ridge complex, south of New Zealand. The earthquake is one of the largest in the Macquarie Ridge complex this century, and represents the right‐lateral strike‐slip co…
View article: The Great MacQuarie Ridge Earthquake of 1989: Introduction
The Great MacQuarie Ridge Earthquake of 1989: Introduction Open
Peer Reviewed
View article: Subduction Zones Part II
Subduction Zones Part II Open
Subduction zones consume oceanic lithosphere and are an indispensible part of plate tectonics. Unlike the oceanic lithosphere production system which can be linked as a nearly continuous, albeit sinuo