Possible Tsunami Deposits Discovered on the Bulgarian Black Sea Coast, and Some Applications

Abstract

The recently discovered tsunami deposits on the Northern Bulgarian Black Sea coast supports the idea that these shore lines have been flooded by local tsunamis in the past. The dating of the discovered deposits and inclusions in them as well as the levelling of their recent positions show that these deposits have been formed may be during the significant earthquake (M>7.0, approximate coordinates: 28.3E, 43.3N) generated the giant landslide occurred in I-st century BC. The effects of this landslide can be still observed on the seashore. The obtained data combined with others (such as tsunami catalogue for the Black sea, the recurrence graphs, the refraction models, the zoning of the tsunami generating sources and vulnerable areas, etc.) can be useful for the tsunami hazard assessment of the Black sea. This possibility is slightly mentioned using the previous investigations of the author and the results obtained about the newly discovered deposits.