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31 mar 2009 · Request PDF | Investigations of historical seismograms of the 1956 Amorgos-Santorini earthquake (Greece, Ms=7.4) | The digitization of historical seismograms allows to gain new information about ...
1.1 The foundation of seismology: seismograms. Seismograms serve as the foundation for global seismology. An example seismic recording is shown in Fig. 1.1. Three orthogonal components of motion (up–down, north–south, and east–west) record the total (vector) ground displacement as a function of time. The example data were recorded at ...
http://gallery.usgs.gov/videos/852This video provides a tutorial for anyone interested in interpreting the seismic records on public webicorder displays.
- 4 min
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- USGS
Seismograms of the World-Wide Standard Seismograph Network (WWSSN) operated by the United States Geological Survey, Office of Earthquake Studies, are written photographically on three-drum recorders that permit the three components of ground motion to be recorded simultaneously. These components are vertical (Z), north-south (N), and east-west (E).
12 ott 2013 · Detailed info, map, data, reports, updates about this earthquake: Strong mag. 6.2 earthquake - Eastern Mediterranean, 34 km west of Kissamos, Chania, Crete, Greece, on Saturday, October 12, 2013 at 13:11 GMT - 278 user experience reports
seismographs in Greece, the characteristics of these instruments, areference on the usage of historical records, as well as a presentation of the procedure followed from the identification of the record to the archiving it as a digital file have been included. Key words: historical seismograms, digitization, Greece. 1. Introduction
A brief history of operation of the mechanicalseismographs in Greece and the application of atechnique for converting analog seismograms to digitaltraces in a form suitable for further processing orarchiving are presented in this study. A short historyabout the installation of mechanical seismographs inGreece, the characteristics of these instruments, areference on the usage of historical ...
