We present some comments on two issues dealt with in Johnston et al. (2006), which reported that there were no electric and magnetic (EM) precursors for the 28 September 2004 M 6.0 Parkfield earthquake (EQ). The first comment is on their introduction, which, while raising critical comments on seismic electric signals (SESs) in Greece and Japan, concluded that useful prediction of EQs seems unlikely using electromagnetic data. We show point by point that their criticism is unfounded. The second comment is on their assertion of the nonexistence of SESs at Parkfield. We point out that this assertion may be...

First Page Preview

First page PDF preview
You do not currently have access to this article.