Earthquake zone

from Wikipedia, the free encyclopedia
The earthquake zones according to DIN 4149

The earthquake zone according to DIN 4149 (until 12/2010) is a classification of areas according to their seismic hazard . Attempts to classify earthquake zones across Europe and to base the design of buildings on these zones have led to the development of the European standard EN 1998-1.

Germany

At the moment the classification in Germany is according to DIN EN 1998-1 / NA: 2011 01 National Annex - Nationally defined parameters - Eurocode 8: Design of structures against earthquakes - Part 1: Basics, earthquake effects and rules for building construction (applies in conjunction with DIN EN 1998-1 (2010-12)).

Zones

There are five different zones, namely areas outside of earthquake zones and earthquake zones 0 to 3:

The zone calculation is based on the assumption of an earthquake of the specified intensity with a return period of 475 years. This means that there is a 90 percent probability that such an earthquake will not be exceeded in 50 years.

  • Areas outside of earthquake zones: Areas with very low seismic hazard, in which the intensity 6.0 is not exceeded with the probability described above on the European Macroseismic Scale .
  • Earthquake zone 0: The intensity reaches a value between 6.0 and 6.5 with the probability described above
  • Earthquake zone 1: The intensity reaches a value between 6.5 and 7.0 with the probability described above
  • Earthquake zone 2: The intensity reaches a value between 7.0 and 7.5 with the probability described above
  • Earthquake zone 3: The intensity reaches a value of more than 7.5 with the probability described above

Values ​​for the assumed lateral accelerations are assigned to the earthquake zones.

Subsoil classes, subsoil classes

The following are also relevant for the construction of buildings :

  • Subsurface classes (R: rocky, S: deep-sedimentary, T: transition areas)
  • Soil classes (A: unweathered rock, B: moderately weathered, C: loose rock)

Italy

The Italian civil defense distinguishes four danger zones:

  • Zone 1 - greatest earthquake risk with the possibility of the strongest earthquakes and a maximum ground acceleration of 0.35 g (this corresponds to a strength of 6 to 7 on the Richter scale; e.g. Amatrice , which was severely affected by an earthquake in 2016, is in this zone)
  • Zone 2 - very dangerous, strongest earthquake possible
  • Zone 3 - strong earthquakes possible
  • Zone 4 - strong earthquakes possible, but rare

United States

The 1997 UBC standard distinguishes four hazard zones (and one zone zero). The most dangerous zone 4 is characterized by a ground acceleration of 0.4 g.

See also

Individual evidence

  1. ↑ Deutsches GeoForschungsZentrum , DIN EN 1998-1 / NA: 2011-01, earthquake zone
    map, map of the earthquake zones and geological subsurface classes for Baden-Württemberg, 1: 350000. Ed .: Baden-Württemberg, Ministry of the Interior. 1st edition 2005.
    Earthquake zone. Federal Geothermal Association, accessed on December 24, 2019 .
  2. ^ Deutsches GeoForschungsZentrum, Seismic load assumptions for the desired location
  3. ↑ Classification of the earthquake zones , accessed September 3, 2016