About
11
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Introduction
Allan López currently works at the Centro de Investigaciones en Ciencias Geológicas (CICG), University of Costa Rica. Allan does research in Geology and Geomorphology. His current research deals with the modelling the stress field and tectonic morphometry
Publications
Publications (11)
We attempt to understand the link between tectonics and landscape evolution in central Costa Rica. In active orogens, landscapes result from a competition between vertical uplift, which modifies the base-level of rivers, and erosional processes. Using topographic profiles and river longitudinal profiles, we attempt to estimate base-level changes wi...
5, the anticipated interplate thrust earthquake ruptured beneath the Nicoya peninsula in northwestern Costa Rica close to the Middle America trench, with a magnitude M w 7.6. Extensive co-seismic observations were provided by dense near-field strong ground motion, Global Positioning Systems (GPS) networks and teleseismic recordings from global seis...
Plate boundary forces acting within the Cocos Plate that is being subducted at a rate of 8.5-9.0 cm a21 towards N328E below the Caribbean Plate and the Panama microplate are found responsible for contemporaneous superimposed compressive, wrench and extensive fault patterns in Central Costa Rica. The stress inversion of fault-slip planes and focal m...
The ongoing deformation being generated by the Costa Rican subduction factory with varying rates of seismicity along its NW-SE trench strike reflects the N32°E plunging of the Cocos plate under the Caribbean and Panamá microplate at a rate of 8.5 to 9.0 cm/year. At the southern part the slab is shallow with high rates of activity induced by irregul...
Earthquake focal mechanism solutions for 135 small-magnitude events are inverted for best fitting partial strain rate tensors that characterize contemporary strain in five areas that span the western margin of the Panama microplate in central Costa Rica. The results indicate the predominance of subhorizontal maximum stretching subparallel to the Mi...
Miocene to Quaternary fault-slip populations, dike orientations, borehole breakouts, cinder cone alignments, and earthquake focal mechanisms covering 60% of Costa Rica are compiled and analyzed to obtain an updated and more realistic reconstruction of the evolution and partitioning of the paleo- and modern stress field in this region of southern Ce...
La mayor parte de la hoja General (Fig. 1) cubre lo que es la Fila Costena, que consiste en una cadena montanosa compuesta en su mayoria de rocas sedimentarias detriticas, basculadas hacia el noreste. La zona de estudio presenta elevaciones que varian entre 164 y 620 m s.n.m.
Questions
Questions (2)
Which criteria should be applied to categorize focal mechanisms constructed from polarities in, say, A,B,C,D quality rankings? I know a number of polarities and their distribution in 4 quadrants along with station coverage, gaps must be considered. I would appreciate feedback very much!
I am looking for a script or free domain software to display and save 3D fault views. The input data: strike,dip, rake from EQ focal mechanisms or outcrops. Can anyone suggest a kind of rotating block diagram (and NOT a beach ball), which shows the apparent displacement?
