2002/01/01 by Qinghua Huang, Qinghua HUANG
Earth and Planetary Sciences · Engineering · #Earthquake Detection and Analysis #Geophysical Methods and Applications #Seismic Waves and Analysis
paper · pdf · doi:10.2183/pjab.78.173
openalex publication_date 2002/01/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31
A model considering the compensation of piezoelectric effect and the dislocation theory of fault is developed to investigate theoretically the generation of co-seismic electric signals. Charges are assumed to be induced by the stress changes associated with earthquakes. The stressinduced charges are quantified by the charge density as a function of the polarization, which can be calculated using a piezoelectric model and an analytical solution of seismic stress. The theoretical charge distribution around the Nojima fault, which moved at the 1995 Kobe earthquake (M=7.2), was obtained. The co-seismic electric field consistent with that observed at the Kobe earthquake was estimated as the field due to the charges, which compensated the piezoelectric charges.