Solar superstorms can create enhanced atmospheric isotopes of carbon 14, beryllium 10 and chlorine 39. High resolution lake sediments and ice cores can discover

Solar superstorms can create enhanced atmospheric isotopes of carbon 14, beryllium 10 and chlorine 39. High resolution lake sediments and ice cores can discover earlier extreme solar events. Many studies point to 774 AD as the largest know solar storm event. Perhaps additional events in 993 and 660 BC.