Two Decades of Seismicity in Storfjorden, Svalbard Archipelago, from Regional Data
| Autor: | Johannes Schweitzer, G. N. Antonovskaya, Myrto Pirli, Berit Paulsen, Yana V. Konechnaya |
|---|---|
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Seismological Research Letters. 92:2695-2704 |
| ISSN: | 1938-2057 0895-0695 |
| DOI: | 10.1785/0220200469 |
| Popis: | About two decades of earthquake parametric data for the area of Storfjorden offer the best medium-term image of seismicity yet for the arctic Svalbard Archipelago. Although seismic activity is dominated by the 2008 Mw 6.1 earthquake and its compound sequence and to a far lesser extent the 2016 Mw 5.1 event near Edgeøya and its aftershocks, as well as episodic earthquake occurrence at Heerland, background levels can be established for the first time, showing that earthquake occurrence in the region shows an episodic but stable character. A certain, minimum level of coverage by the regional seismic network is crucial for seismicity to be mapped accurately in space and time, whereas the efficiency of automatic data processing algorithms also plays a role. The evolution of the network and developments in data processing suggest that images of seismicity prior to mid-2000s and at more remote regions of the Archipelago are biased. Despite restrictions, some safe conclusions can be drawn about present-day seismotectonics. The results have implications for the tectonic placement of the region and the assessment of seismic hazard. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|