Probabilistic seismic hazard assessment of Sweden

Joshi, Niranjan; Lund, Björn; Roberts, Roland

doi:https://doi.org/10.5194/nhess-24-4199-2024

Articles | Volume 24, issue 11

https://doi.org/10.5194/nhess-24-4199-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Harmonized seismic hazard and risk assessment for Europe

https://doi.org/10.5194/nhess-24-4199-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 11

Research article

|

28 Nov 2024

Research article |

| 28 Nov 2024

Probabilistic seismic hazard assessment of Sweden

Niranjan Joshi, Björn Lund, and Roland Roberts

Data sets

Earthquake catalogue data - SNSN Swedish national seismic network https://doi.org/10.18159/SNSN

Earthquake catalogue data - FNSN FNSN https://doi.org/10.14470/UR044600

Earthquake catalogue data - NNSN University of Bergen http://seismo.geo.uib.no/nnsn/#/

Earthquake catalogue data - GEUS The Geological Survey of Denmark and Greenland https://www.geus.dk/natur-og-klima/jordskaelv-og-seismologi/registrerede-jordskaelv-i-danmark

Earthquake catalogue data - Estonian seismic network Geological Survey of Estonia https://www.egt.ee/en/fields-activity-and-objectives/geology-and-environment/seismic-research-and-monitoring

Model code and software

PyGMT: A Python interface for the Generic Mapping Tools Dongdong Tian et al. https://doi.org/10.5281/zenodo.13679420

geopandas/geopandas: v0.8.1 K. Jordahl et al. https://doi.org/10.5281/zenodo.3946761

pandas-dev/pandas: Pandas The pandas development team https://doi.org/10.5281/zenodo.3509134

Short summary

Few large earthquakes and low occurrence rates make seismic hazard assessment of Sweden a challenging task. Recent expansion of the seismic network has improved the quality and quantity of the data recorded. We use these new data to estimate the Swedish seismic hazard using probabilistic methods to find that hazard was previously underestimated in the north. The north has the highest hazard in Sweden, with estimated mean peak ground acceleration of up to 0.06 g for a 475-year return period.