Publication Date:
2017-04-04
Description:
We have analyzed 18 out of the selected 19 events of the Italian seismic history. We have paid
particular attention to the Adriatic coast earthquakes, 1908 Calabro Messinese and the 1917
Sansepolcro earthquakes. The historical bulletins, the instrumental parameters and the paper
seismograms for all the 13 events have been recovered. The relocation of the events for which we
have the complete set of data (the P and S arrival times and the paper records to read the missing
arrival times) was carried out. We have vectorialized seismograms for the recovered components
of the following earthquakes: Calabria 1905, Calabro Messinese 1908, Monterchi-Citerna 1917,
Senigallia 1930, Adriatic reagion1934,1938, 1962.
For the earthquakes occurred during war periods, is very difficult to find the bulletins, the paper
seismograms and the instrument parameters. However, for the 1916 Adriatic earthquake we have
enough bulletins to estimate the instrumental location.
The Sismos team has developed a new methodology to compute the moment tensor. This method
has the advantage to be suitable for historical dataset, but require long time computation even
using the new multi-dualcore computers. Using this technique we have calculated the moment
tensor and magnitude for the 1917 San Sepolcro earthquake using amplitudes from digitized
seismograms, while polarities come from both bulletins and seismograms reading.
Description:
Unpublished
Description:
Università Roma3
Description:
3.1. Fisica dei terremoti
Description:
open
Keywords:
historical seismicity
;
04. Solid Earth::04.02. Exploration geophysics::04.02.06. Seismic methods
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
Poster session
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