Vladimir Kostoglodov

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[1] Geodetic measurements from a network of permanent GPS stations along the Pacific coast of Mexico reveal a large ‘‘silent earthquake’’ along the segment of the Cocos-North American plate interface identified as the Guerrero seismic gap. The event began in October of 2001 and lasted for 6– 7 months. Average slip of 10 cm produced measurable displacements(More)
The Guerrero region of southern Mexico has accumulated more than 5 m of relative plate motion since the last major earthquake. In early 1998, a continuous GPS site in Guerrero recorded a transient displacement. Modeling indicates that anomalous fault slip propagated from east to west along-strike of the subduction megathrust. Campaign GPS and leveling data(More)
[1] Nonvolcanic tremor (NVT) activity is revealed as episodes of higher spectral amplitude at 1–8 Hz in daily spectrograms from the continuous seismological records in Guerrero, Mexico. The analyzed data cover a period of 2001–2007 when in 2001–2002 a large slow slip event (SSE) had occurred in the Guerrero-Oaxaca region, and then a new large SSE occurred(More)
[1] The last decade featured an explosive sequence of discoveries of slow slip events (SSE) and nonvolcanic tremor (NVT) in different subduction zones and continental faults. Many observations show that SSE is usually associated with an increased NVT activity but it is not clear yet if those events are the result of the same process or are independent(More)
A large-scale slow slip event with a magnitude equivalent to Mw = 7.4 has been observed at seven continuous GPS stations located in the Guerrero–Oaxaca region, southern Mexico, for several months from late 2001 to middle 2002 [Geophys. Res. Lett. (2003) 30: doi: 10.1029/2003GL017219]. We re-analyzed the GPS time series data to estimate the displacements(More)
Repeated cross-correlations of ambient seismic noise indicate a long-term seismic velocity change associated with the 2006 M7.5 slow-slip event (SSE) in the Guerrero region, Mexico. Because the SSE does not radiate seismic waves, the measured velocity change cannot be associated with the response of superficial soil layers to strong shaking as observed for(More)
1Laboratoire de Géologie, Ecole Normale Supérieure,CNRS, Paris, France 2 ISTerre, Université de Grenoble 1, CNRS, F-38041 Grenoble, France 3 now at Laboratoire de Géodynamique des rifts et des Marges passives, Université du Maine, UMR6115, Le Mans, France 4Instituto de Geofı́sica, Universidad Nacional Autónoma de México, Mexico 5 Instituto Nacional de(More)
Epicentral locations of non-volcanic tremors (NVT) in the Mexican subduction zone are determined from the peak of the energy spatial distribution and examined over time. NVT is found to occur persistently at a distance of ~215 km from the trench, which we term the “Sweet Spot” because this region probably has the proper conditions (i.e. temperature,(More)
[1] A large slow slip event (SSE) had been expected for the Guerrero gap for 2010. It was actually observed with an onset in July 2009. Comparison with the preceding large SSEs, which occurred in 2002 and 2006, highlights both persistent characteristics of the Guerrero SSEs (e.g. the localization of slip in the seismogenic part of the subduction interface),(More)