Investigating hydroclimatic impacts of the 168–158 BCE volcanic quartet and their relevance to the Nile River basin and Egyptian history

When 4 volcanoes erupted during the Ptolemaic era (305–30 BCE), it lowered farming productivity in ancient Egypt, possibly causing intermittent political and social unrest in the form of (sometimes widespread) revolts against the Ptolemaic elites. A bit technical, but important information