Most of the research of Sebastian Krastel is related to sediment transport processes and associated geohazards. Central research questions include:

• What processes control sediment (re)deposition and transport on the shelf, across the shelf break and on the continental slope?
• What are the dominant processes and environmental controls of mass wasting?
• How dangerous are slope failures on continental margins and in lakes?
• How can we use sedimentary archives in lakes in order to reconstruct their geological evolution?
• How do submarine volcanoes and volcanic islands evolve?