Search for latitudinal variation of spectral peak frequencies of low-frequency eigenmodes excited by great earthquakes

摘要

Continuous waveform records of STS-1 seismometers of the Incorporated Research Institutions for Seismology (IRIS) and superconducting gravimeters of the Global Geodynamics Project (GGP) obtained during the 2004 Sumatra-Andaman, the 2010 Chile, and the 2011 off the Pacific coast of Tohoku earthquakes are examined to search for latitudinal variations of the spectral peak frequencies of S-0(0), S-1(0), and S-0(2). No latitudinal variation is determined. The observed spectral peak frequencies are identical to those of the Preliminary Reference Earth Model (PREM). (C) 2014 Elsevier B.V. and NIPR. All rights reserved.