Updated ground motion prediction model for Mexican intermediate-depth intraslab earthquakes includingV/Hratios
Por:
Jaimes, Miguel A., Garcia-Soto, Adrian D.
Publicada:
1 ago 2020
Resumen:
This article presents an updated ground motion prediction equation for
pseudo acceleration values from Mexican intermediate-depth intraslab
earthquakes at rock sites (National Earthquake Hazards Reduction Program
(NEHRP) class B) for the horizontal and the vertical components. The
equations were built as functions of magnitude, distance to the fault
surface of the earthquake and focal depth, using 23 event recordings
(366 records). The database is extended from a previous one used to
develop a ground motion prediction equation for intraslab earthquakes,
including 7 more events and over 80 accelerograms recorded from 2005 to
2017. The previous model neither included the ground motion parameters
from the two significant normal-faulting events occurred in 2017, nor
the computing ofV/Hratios. Differences in the predicted ground motion
parameters are found. Therefore, an updated attenuation model for
intraslab earthquakes is developed for distances up to around 400 km and
Mw from approximately 5 to 8.2. The model includes a depth-scaling term
with focal depths restricted up to 75 km.
Filiaciones:
Jaimes, Miguel A.:
Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City, DF, Mexico
Garcia-Soto, Adrian D.:
Univers Guanajuato, Dept Ingn Civil, Guanajuato, Mexico
|