scholarly journals Fluid accumulation along the Costa Rica subduction thrust and development of the seismogenic zone

2015 ◽  
Vol 120 (1) ◽  
pp. 67-86 ◽  
Author(s):  
Nathan L. Bangs ◽  
Kirk D. McIntosh ◽  
Eli A. Silver ◽  
Jared W. Kluesner ◽  
César R. Ranero
Keyword(s):  
Costa Rica ◽  
Seismogenic Zone ◽  
Fluid Accumulation

Osa Peninsula, Costa Rica: A unique opportunity to drill and instrument the seismogenic zone of large megathrust earthquakes

2019 ◽  
Author(s):  
Marino Protti ◽  
◽  
Nathan Bangs ◽  
Peter Baumgartner ◽  
Donald Fisher ◽  
...  
Keyword(s):  
Costa Rica ◽  
Seismogenic Zone ◽  
Osa Peninsula ◽  
Megathrust Earthquakes

scholarly journals Geodetic and seismic constraints on some seismogenic zone processes in Costa Rica

2004 ◽  
Vol 109 (B11) ◽  
Author(s):  
Edmundo Norabuena ◽  
Timothy H. Dixon ◽  
Susan Schwartz ◽  
Heather DeShon ◽  
Andrew Newman ◽  
...  
Keyword(s):  
Costa Rica ◽  
Seismogenic Zone

Modeling the Interaction between Slow Slip Events and Earthquake Ruptures in the Nicoya Peninsula, Costa Rica. 

2021 ◽  
Author(s):  
Lise Alalouf ◽  
Yajing Liu
Keyword(s):  
Costa Rica ◽  
Subduction Zones ◽  
Computation Time ◽  
Seismogenic Zone ◽  
Model Parameters ◽  
Slow Slip ◽  
Coseismic Slip ◽  
Slow Slip Events ◽  
Megathrust Earthquakes ◽  
Earthquake Ruptures

<p>Subduction zones are where the largest earthquakes occur. In the past few decades, scientists have also discovered the presence of episodic aseismic slip, including slow slip events (SSEs), along most of the subduction zones. However, it is still unclear how these SSEs can influence megathrust earthquake ruptures. The Costa Rica subduction zone is a particularly interesting area because a SSE was recorded 6 months before the 2012 Mw7.6 earthquake in the Nicoya Peninsula, suggesting a potential stress transfer from the SSE to the earthquake slip zone. SSEs beneath the Nicoya Peninsula were also recorded both updip and downdip the seismogenic zone, making it a unique area to study the complex interaction between SSEs and earthquakes.</p><p>As most of the shallow SSEs were recorded around the Nicoya Peninsula, we chose to start using a 1D planar fault embedded in a homogeneous elastic half-space, with different dipping angles following several geometric profiles of the subduction fault beneath the Nicoya Peninsula section of the Costa Rica margin. This 1D modelling study allows us to better investigate the interaction between shallow and deep SSEs and megathrust earthquakes with high numerical resolution and relatively short computation time. The model provides information on the long-term seismic history by reproducing the different stages of the seismic cycle (interseismic slip, shallow and deep episodic slow slip, and coseismic slip).</p><p>We study the influence of the variation of numerical parameters and frictional properties on the recurrence interval, maximum slip velocity and cumulative slip of SSEs (both shallow and deep) and earthquakes and their interaction with each other. We then compare our results with GPS and seismic observations (i.e. cumulative slip, characteristic duration, moment rate, depth and size of the rupture, equivalent magnitude) to identify an optimal set of model parameters to understand the interaction between various modes of subduction fault deformation.</p>

scholarly journals Seismogenic zone structure beneath the Nicoya Peninsula, Costa Rica, from three-dimensional local earthquakeP- andS-wave tomography

2006 ◽  
Vol 164 (1) ◽  
pp. 109-124 ◽  
Author(s):  
Heather R. DeShon ◽  
Susan Y. Schwartz ◽  
Andrew V. Newman ◽  
Victor González ◽  
Marino Protti ◽  
...  
Keyword(s):  
Costa Rica ◽  
Three Dimensional ◽  
Seismogenic Zone ◽  
Zone Structure ◽  
Wave Tomography

scholarly journals Seismogenic zone structure of the southern Middle America Trench, Costa Rica

2003 ◽  
Vol 108 (B10) ◽  
Author(s):  
H. R. DeShon ◽  
S. Y. Schwartz ◽  
S. L. Bilek ◽  
L. M. Dorman ◽  
V. Gonzalez ◽  
...  
Keyword(s):  
Costa Rica ◽  
Seismogenic Zone ◽  
Zone Structure ◽  
Middle America Trench ◽  
Middle America

scholarly journals IODP Expedition 334: An Investigation of the Sedimentary Record, Fluid Flow and State of Stress on Top of the Seismogenic Zone of an Erosive Subduction Margin

2013 ◽  
Vol 15 ◽  
pp. 23-30 ◽  
Author(s):  
P. Vannucchi ◽  
K. Ujiie ◽  
N. Stroncik ◽  
Keyword(s):  
Costa Rica ◽  
Subduction Zones ◽  
Accumulation Rate ◽  
Marked Change ◽  
Seismogenic Zone ◽  
Geochemical Data ◽  
Cocos Plate ◽  
Middle Slope ◽  
Upper Slope

The Costa Rica Seismogenesis Project (CRISP) is an experiment to understand the processes that control nucleation and seismic rupture of large earthquakes at erosional subduction zones. Integrated Ocean Drililng Program (IODP) Expedition 334 by R/V <i>JOIDES Resolution</i> is the first step toward deep drilling through the aseismic and seismic plate boundary at the Costa Rica subduction zone offshore the Osa Peninsula where the Cocos Ridge is subducting beneath the Caribbean plate. Drilling operations included logging while drilling (LWD) at two slope sites (Sites U1378 and U1379) and coring at three slope sites (Sites U1378–1380) and at one site on the Cocos plate (Site U1381). For the first time the lithology, stratigraphy, and age of the slope and incoming sediments as well as the petrology of the subducting Cocos Ridge have been characterized at this margin. The slope sites recorded a high sediment accumulation rate of 160–1035m m y<sup>&minus;1</sup> possibly caused by on-land uplift triggered by the subduction of the Cocos Ridge. The geochemical data as well as the <i>in situ</i> temperature data obtained at the slope sites suggest that fluids are transported from greater depths. The geochemical profiles at Site U1381 reflect diffusional communication of a fluid with seawater-like chemistry and the igneous basement of the Cocos plate (Solomon et al., 2011; Vannucchi et al., 2012a). The present-day <i>in situ</i> stress orientation determined by borehole breakouts at Site U1378 in the middle slope and Site U1379 in the upper slope shows a marked change in stress state within ~12 km along the CRISP transect; that may correspond to a change from compression (middle slope) to extension (upper slope). <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.15.03.2013" target="_blank">10.2204/iodp.sd.15.03.2013</a>

scholarly journals Persistent tremor within the northern Costa Rica seismogenic zone

2011 ◽  
Vol 38 (1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Jacob I. Walter ◽  
Susan Y. Schwartz ◽  
J. Marino Protti ◽  
Victor Gonzalez
Keyword(s):  
Costa Rica ◽  
Seismogenic Zone
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