Year 774 was a common year starting on Saturday of the Julian calendar. The denomination 774 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.

2020年12月30日 · In the year 774 AD, an enormously powerful blast of matter and energy from space slammed into Earth. Nothing like it had been felt on this planet for 10,000 years. A mix of high-energy light and hugely accelerated subatomic particles, when this wave impacted Earth it changed our atmospheric chemistry enough to be measured centuries later.

2018年8月28日 · Recently, a rapid increase in radiocarbon (14 C) was observed in Japanese tree rings at AD 774/775. Various explanations for the anomaly have been offered, such as a supernova, a γ-ray burst, a...

What happened and who was notable in 774 AD? Browse important events, world leaders, notable birthdays, and tragic deaths from the year 774 AD.

2020年10月29日 · The 774 AD solar proton event (SPE) detected in cosmogenic nuclides had an inferred >1 GV (>430 MeV) fluence estimated to have been ∼30–70 times larger than that of the 1956 February 23 ground level event (GLE). The 1956 GLE was itself ∼2.5 times larger at >430 MeV than the episode of strong GLE activity from 1989 August–October.

IN 774 AD, THE SUN BLASTED EARTH WITH THE BIGGEST STORM IN 10,000 YEARS. 简介：公元774年，来自太阳的高能光和极大加速的亚原子粒子的混合体撞击了地球，它改变了地球的大气化学性质，在数个世纪后都可以测量到。 公元774年，一股来自太空的强大物质和能量波冲击了地球。 一万年来，这个星球上从未有过这样的遭遇。 高能光和加速巨大的亚原子粒子的混合物，当这能量波冲击地球时，它改变了我们的大气层化学组成结构，几个世纪后仍然能测量出来 …

April 5, 2017 – In the years 774 to 775 Charlemagne, the Frankish king, defeated the Lombards in Italy on the way to establishing a new so-called Roman Empire in Western Europe. But that historic event pales when compared to the cosmological one that …

2023年1月1日 · 研究人员考虑了历史上最强烈的太阳粒子风暴事件，即公元774年的事件，根据宇宙成因同位素的测量，计算了在航空高度下的环境剂量。 由于无法直接获得

2016年5月27日 · This information was collected as part of a lifelong project to create a historical timeline by E. McNally. The rest of the timeline can be found here: https://archive.org/details/emcnallychronology. Unordered events occurring during the year of …

Here, we show that the event was most likely caused by the Sun and occurred during the spring of AD 774. Particularly, the event intensities from various locations show a strong correlation with the latitude, demonstrating a particle-induced 14 C poleward increase, in accord with the solar origin of the event.