Correlation Between Solar and Seismic Activity: Prognosis of Earthquakes and Volcanic Eruptions Based on Daily Solar Indexes

Large earthquakes and volcanic eruptions are compared with the epochs of minima of 11-year cycles of solar activity. We use the data from 405 earthquakes with magnitude 7 and more and 71 volcanic eruption during 260 years. Close correlation between years of these terrestrial events and years of minima of solar activity is shown. We also use also daily solar indexes SSp and compare them with terrestrial events, constituting the main novelty of this work. Here we use the data of earthquakes between December 856 and January 2016, as well as data of volcanic eruptions in the same period. We subsequently compare daily indexes SSp during 2016 and 4 months of 2017 with earthquakes and volcanic eruptions. An important results is demonstrated: as soon as solar activity curve begins to go down, on the same day or some days after the earthquakes and volcanic eruptions occur. Evidently, this circumstance could be used for prognosis of these terrestrial events for several days in advance. In all cases considered our prognosis is confirmed. This is the main result of this article.