Source of the great A.D. 1257 mystery eruption unveiled, Samalas volcano, Rinjani Volcanic Complex, Indonesia
22 years later, a "full" solar cycle, in 1279 another Solar Energetic Event was logged.
LOL This trekking website downplays the Risk around Rinjani complex.
<a href="https://www.rinjanidawnadventures.com/mount-rinjani/" target="_blank">https://www.rinjanidawnadventures.com/mount-rinjani/</a>
A 1256 Volcano also produced a significant eruption, in Saudi Arabia, at harrat Rahat. Which also went off in 641 CE (AD). In 1256 the lava travelled almost a full marathon, and threatened the Islamic Holy City of Medina. The 641 Eruption was one solar cycle after the Death of Muhammad in 6-8-632. Muhammad died in Medina one solar cycle after be forced out elsewhere, and he and disciples had to move to Medina.