Nonvolcanic tremor observed in the Mexican subduction zone
作者： Juan S. Payero , Vladimir Kostoglodov , Nikolai Shapiro , Takeshi Mikumo , Arturo Iglesias
DOI: 10.1029/2007GL032877
关键词: Continental crust 、 Seismology 、 Amplitude 、 Slip (materials science) 、 Subduction 、 Narrow band 、 Magnetic anomaly 、 Hypocenter 、 Spectral amplitude 、 Geology
摘要: Nonvolcanic tremor (NVT) activity is revealed as episodes of higher spectral amplitude at 1–8 Hz in daily spectrograms from the continuous seismological records Guerrero, Mexico. The analyzed data cover a period 2001–2007 when 2001–2002 large slow slip event (SSE) had occurred Guerrero-Oaxaca region, and then new SSE 2006. burst dominated by S-waves. More than 100 strong NVT bursts were recorded narrow band ~40 × 150 km^2 to south Iguala City parallel coastline. Depths hypocenters are mostly scattered continental crust between 5 40 km depth. Tremor during 2006 compared with that for “quiet” 2003–2005. While resistivity pattern Guerrero does not correlate directly distribution, gravity magnetic anomaly modeling favors hypothesis apparently related dehydration serpentinization processes.
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