Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (10) Citing Articles via Google Scholar Google Scholar Articles by Leonard, M. Search for Related Content GeoRef GeoRef Citation

Comparison of Manual and Automatic Onset Time Picking

Australian Geological Survey Organisation
GPO Box 378
Canberra ACT 2600, Australia

The onset times for 78 teleseismic iP phases are picked by four seismic analysts and by three automatic picking algorithms, on both the single trace and on an array beam. The difference in the onset times picked by different analysts is on average ±0.067 sec with a standard deviation of 0.15 sec. The analysts on average pick times 0.1 sec earlier on the beam than on the single trace.

The three automatic pickers are the picker described by Earle and Shearer (1994), an autoregressive–Akaike information criteria (AR-AIC) picker (Leonard and Kennett, 1999) and an adjusted AR-AIC picker, which is described in this article. Of the three automatic pickers, the adjusted AR-AIC picker picks onset times closest to an experienced analyst. Compared to the three most experienced analysts, the difference in onset time is on average ± 0.043 sec, with a standard deviation of 0.19 sec. These values are very similar to the differences between the analysts, suggesting that for many applications, the time estimated by the adjusted AR-AIC picker can be used without review by a seismic analyst.

This article has been cited by other articles:

				C. Zeiler and A. A. Velasco Seismogram Picking Error from Analyst Review (SPEAR): Single-Analyst and Institution Analysis Bulletin of the Seismological Society of America, October 1, 2009; 99(5): 2759 - 2770. [Abstract] [Full Text] [PDF]

				M. W. Hildyard, S. E. J. Nippress, and A. Rietbrock Event Detection and Phase Picking Using a Time-Domain Estimate of Predominate Period Tpd Bulletin of the Seismological Society of America, December 1, 2008; 98(6): 3025 - 3032. [Abstract] [Full Text] [PDF]

				J. Tronicke The Influence of High Frequency Uncorrelated Noise on First-Break Arrival Times and Crosshole Traveltime Tomography Journal of Environmental & Engineering Geophysics, June 1, 2007; 12(2): 173 - 184. [Abstract] [Full Text] [PDF]

				Automatic P-Wave Arrival Detection and Picking with Multiscale Wavelet Analysis for Single-Component Recordings Bulletin of the Seismological Society of America, October 1, 2003; 93(5): 1904 - 1912.