AHEAD European Archive of Historical EArthquake DataEuropean Archive of Historical EArthquake Data

Elenco studiData sources
Elenco terremotiEarthquakes

Gisler et al., 2004c

Gisler M., Fäh D., Deichmann N., 2004c. The Valais earthquake of December 9, 1755. Eclogae Geol. Helv., 97, 3, 411-422. https://doi.org/10.1007/s00015-004-1130-9

    link      PDF abstract only 


The earthquake on December 9, 1755 is one of the major events in the Valais region, having an important influence on the seismic hazard assessment of the area. The re-evaluation of the event was undertaken in the course of upgrading the Earthquake Catalog of Switzerland (ECOS). It is now based on a newly investigated and reliable database created through research in archives and libraries. Using the data made available by the historical information, we assigned site intensities according to the criteria established by the European macroseismic scale EMS 98 (Grünthal 1998). Based on the broad spectrum of the available information, we assigned minimum and maximum possible values (Imin; Imax) and determined a most probable intensity value (Iw) for each site. The maximum observed intensity, Ix, is the largest intensity for each quake. Epicentral intensity, I0, is equal to the maximum observed intensity Ix, if at least two data points are assigned an intensity of Ix. We obtained maximum Ix = I0 = VIII at Brig/VS (46.3/8.0) and moment magnitude Mw = 6.1.

Nell'archivio c'è un terremoto da questo studio:In the archive there is one earthquake considered from this study:

molto grandiextra large
molto piccolivery small
non parametrizzatinot determined

Clicca sulla riga per individuare il terremoto sulla mappa o sulla lente per ottenere più informazioni.Click the row to highlight the earthquake on the map or the lens to obtain more information.

  DataDate    Area epicentraleEpicentral area    MDPs   Imax  EQ in
EQ in
Riferim. in
1755 12 09 13 30Valais  81  8