I was watching the 6 part BBC's 'Story of India' and had a thought about the abandonment of the Indus cities and migration eastward due to the failure of the monsoon. Could this failure of the monsoon be due to the eruption of the island of Theara north of Crete? The timing seems close. The ash cloud traversed Egypt, so it would have ended up in the Indian Ocean. Is there any evidence of ash deposits in the Indus river valley from the eruption? Is it possible the ash went too far south to show up and still affect the monsoon? Just curious if anyone has thought of this before.