SciELO - Scientific Electronic Library Online

 
vol.46 número1Geodynamics of the Wadati-Benioff zone earthquakes: The 2004 Sumatra earthquake and other great earthquakes índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Revista

Articulo

Indicadores

Links relacionados

  • No hay artículos similaresSimilares en SciELO

Compartir


Geofísica internacional

versión On-line ISSN 2954-436Xversión impresa ISSN 0016-7169

Resumen

VALENZUELA, Raúl W. et al. The seismic and hydroacoustic stations on Socorro Island: Early results. Geofís. Intl [online]. 2007, vol.46, n.1, pp.3-18. ISSN 2954-436X.

A seismic and hydroacoustic network on Socorro Island was installed jointly by the Servicio Sismológico Nacional, Instituto de Geofísica, Universidad Nacional Autónoma de México, and the Comprehensive Nuclear-Test-Ban Treaty Organization. The detection of ten earthquakes in June and July 2004 is reported in this study. These events occurred at epicentral distances between 209 and 9050 km and ranged in magnitude between 3.9 and 6.8. An event in the Kamchatka Peninsula featured arrivals of teleseismic high-frequency P and pP waves from a distance of 8245 km. An earthquake in the Guerrero-Oaxaca, Mexico, region shows clear seismic and T phases. Three earthquakes in the Rivera Fracture Zone were recorded, thus leading to the expectation of the continued detection of events from nearby fracture zones as well as earthquakes generated by volcanoes on Socorro and San Benedicto Islands. The analysis of the T phases from several events validates the design of the network, with three sites around the island in order to record arrivals from all directions. High frequency seismic waves generated by acoustic waves attenuate as they propagate through the rock from one end of the island to the other. Consequently small or distant events are difficult to detect at the far side of the island.

Palabras llave : Comprehensive Nuclear-Test-Ban Treaty (CTBT); Sound Fixing and Ranging (SOFAR) channel; nuclear explosions; Socorro Island; T phases, Rivera Fracture Zone; Pacific ocean.

        · resumen en Español     · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License Todo el contenido de esta revista, excepto dónde está identificado, está bajo una Licencia Creative Commons