I want to know the answer to the following question:
What event formed a crater in Saaremaa?
All the background I'm provided with is that "According to the legend in the chronicle Tharapita was born on a forested mountain in Virumaa (Latin: Vironia), mainland Estonia from where he flew to Oesel, Saaremaa The name Taarapita has been interpreted as "Taara, help!"/"Thor, help!"". Is that enough to answer the question?
Answer: no